Electricity Saving Tips For Homes And Offices

What is Inverter Technology AC and How it is Different from BEE 5 star Non Inverter AC?

By on July 17, 2017

Air Conditioners are a pain point for most people in our country who are concerned about their electricity bills. The moment an air conditioner is added to the list of appliances used in a household, the electricity bills increase significantly. Although it is difficult to significantly reduce the “big” impact of an air conditioner on your electricity bills, but still some of it can be managed by choosing the right technology, doing the right installation/maintenance/operation and by doing the right insulation of the room where the air conditioner is used (more details in our articles listed at the end of this article).

When it comes to technology, there were not many available till sometime back. When BEE actively started analyzing and labeling the air conditioners, we got some good one in form of 5 star air conditioners. The latest and the most efficient technology that is available in market today is the Inverter Technology for air conditioners. Inverter technology is designed in such a way that it can save 30-50% of electricity (units consumed) over a regular air conditioner. And since 2016, BEE has started give star ratings to inverter technology ACs as well. However, let’s look at what is inverter technology and how is it different from a non inverter BEE 5 star rated ACs. But before that if you reached this page looking for best inverter ACs in India, then here is the list:

Best Inverter ACs in India

  • Godrej GSC 12 FIXH 7 GGPG (1.00 ton, BEE 5 star inverter split air conditioner)
  • Bluestar 3CNHW12TAFU (1.00 ton, BEE 3 star inverter split air conditioner)
  • Daikin JTKM50 (1.50 ton, BEE 5 star inverter split air conditioner)
  • Hitachi RSH318EAEA (1.50 ton, BEE 3 star inverter split air conditioner)
  • Mitsubishi electric MSY-GK24VA (2.00 ton, BEE 5 star inverter split air conditioner)
  • Hitachi RMB324IAEA (2.00 ton, BEE 3 star inverter split air conditioner)
  • Bluestar 5CNHW09PAFU (0.75 ton, BEE 5 star inverter split air conditioner)
  • Bluestar 3CNHW09CAFU (0.75 ton, BEE 3 star inverter split air conditioner)

You can get a more detailed list and options at the end of this article.

How does an air conditioner work?

For most people, air conditioner just throws cool air at the temperature one sets it at. But does it really work that way? In fact air conditioner during cooling process, takes the indoor air, cools it by passing it through evaporator and throws it back in the room. It is quite opposite to how our good old air coolers used to work. Air coolers used to take outside air, cool it with water and throw it in. But air conditioners just work on internal air. Along with evaporator air conditioner also has a compressor that compresses the gas (refrigerant) in the AC to cool it that in turn cools the incoming internal air from the room.

In a regular air conditioner:

The compressor is either off or on. When it is on, it works at full capacity and consumes full electricity it is designed to consume. When the thermostat reaches the temperature level set in the AC, the compressor stops and the fan (in AC) continues to operate. When the thermostat senses that the temperature has increased, the compressor starts again.

What is Inverter Air Conditioner?

The inverter technology works like an accelerator in a car. When compressor needs more power, it gives it more power. When it needs less power, it gives less power. With this technology, the compressor is always on, but draws less power or more power depending on the temperature of the incoming air and the level set in the thermostat. The speed and power of the compressor is adjusted appropriately. This technology was developed in Japan and is being used there successfully for air conditioners and refrigerators. This technology is currently available only in split air conditioners.

What is benefit of Inverter Technology?

Every air conditioner is designed for a maximum peak load. So a 1.5ton AC is designed for a certain size of room and 1 ton for a different size. But not all rooms are of same size. A regular air conditioner of 1.5ton capacity will always run at peak power requirement when the compressor is running. An air conditioner with inverter technology will run continuously but will draw only that much power that is required to keep the temperature stable at the level desired. So it kind of automatically adjusts its capacity based on the requirement of the room it is cooling. Thus drawing much less power and consuming lesser units of electricity.

Although air conditioner with Inverter Technology adjusts its capacity based on the room requirement, it is very important to install a right sized air conditioner in a room. Please make sure that you evaluate the room and air conditioner capacity before you make a purchase.

What’s the difference between Inverter Technology AC and BEE 5 star non inverter AC:

  1. Inverter technology air conditioners are variable speed/ variable tonnage air conditioners and thus operationally they are quite different from regular air conditioners that have single speed compressors and single tonnage.
  2. Inverter technology air conditioners adjust their speed/tonnage depending on heat load of a room. Whereas regular air conditioners do not.
  3. Every room has a different heat load, even if they are of the same size. The heat load depends on various factors as we have listed on our article: Things that impact electricity consumption in air conditioners. To give you an analogy, every human being is different; even then the waist sizes of most trousers available in the market are fixed (leaving the ones with elastic). Inverter Technology AC is just like a trouser with an elastic waist that can adjust to the size. The other benefit is that even if the waist size increases or decreases, the trouser with elastic will adjust accordingly. Regular Air Conditioners are fixed size.
  4. Based on the data on power consumption by BEE, Inverter ACs of BEE 3 star ratings are about 7% more energy efficient than BEE 5 star rated non inverter ACs.
  5. The heat load in a room does not remain constant and it varies from seasons, varies based on number of people, varies between day and night, varies based on climate profiles of your location. To take the same analogy we mentioned above, the waist size increases or decreases with the amount of food one eats or the amount of exercise one does. So as a trouser with elastic waist can work well, an air conditioner with inverter tech can work well.

Power Consumption of Inverter and non inverter air conditioners.

Based on data from BEE in 2017, below is the representative (median) sample of power consumption of Air Conditioners of various tonnage and star ratings:

0.75 ton1 ton1.5 ton2 ton
3 Star Non Inverter62782812351548
5 Star Non Inverter57676011301412
3 Star Inverter55072610771344
4 Star Inverter4996589721208
5 Star Inverter4215578151005
Annual Electricity Consumption (Units or kWh for 1600 hrs) based on data from BEE

Are Inverter technology air conditioners slow in cooling?

Several people have concerns that Inverter Technology air conditioners do not cool well or cool slowly. However let us take this image as reference to understand how inverter AC works:

Inverter AC

Non inverter ACs are fixed speed ACs, where as inverter ACs are variable speed ACs. Non inverter ACs have compressors that go “On” and “Off”. Whereas inverter ACs have compressors that are “On” all the time. As non inverter ACs are sized for peak summer heat load, they are over-sized all the other times (in fact most of the time people oversize even for peak summer season). The drawback of the same is that the AC “Over cools” most of the time. So if you set AC at temperature of 25, it will cool it down to 23 or 22. Now one would question: then what is the use of thermostat? Well the thermostat (in a non inverter AC) switches off the compressor when the outside temperature has reached 25. But a lot has happened before that. In an AC, refrigerant moves from liquid to gas (by taking heat from the room) and then back from gas to liquid as the compressor compresses it. But if the refrigerant is more and heat in the room is less (which happens in over sized AC), it does not get enough heat from the room to convert from liquid to gas and it keeps moving as liquid. Now when the thermostat detects temperature and switches off the compressor, the refrigerant still remains in liquid state and thus has capacity to take heat from room to convert to gas. And so it takes more heat from the room and cools the room below the set temperature.

In comparison, the inverter tech AC changes the flow rate of refrigerant based on the heat of the room. When heat is less, the flow rate is less, when heat is more, the flow rate is more. And it does not switch off the compressor ever. It just makes sure that if temperature setting is 25, it is maintained at that level.

So the difference is: non inverter AC would over cool as shown in the picture. Whereas inverter AC will cool optimum. And thus one may feel that inverter AC does not cool or is slow.

Is there a Window AC with inverter technology available in market?

No there is no window Air Conditioner with inverter tech available in market. Will they be available in future? We don’t know.

Are there Star Ratings for Inverter ACs?

In 2016, BEE introduced a new star rating standard for Inverter Technology ACs as well. Currently most models are in BEE 3, 4 and 5 Star rating ranges on BEE. In future (in 2018), BEE plans to merge the star rating standards of inverter and non inverter ACs. To know more about new star rating standards for Inverter ACs, you may read this page on our website: Understand What is ISEER and Star Labeling of Inverter Air Conditioners in India.

If you are looking for most energy efficient inverter ACs, here is the list:

Best Ten Energy Efficient BEE 5 & 4 Star Rated Inverter Air Conditioners in India


Click on a category button below to choose category.

  • Best 1.5 Ton BEE 5 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 1.40 Ton
      • 5.20 ISEER
      • 744 Annual Units (for 1600 hrs)
    • Rank 2
      • 1.50 Ton
      • 5.15 ISEER
      • 793 Annual Units (for 1600 hrs)
    • Rank 3
      • 1.40 Ton
      • 4.90 ISEER
      • 791 Annual Units (for 1600 hrs)
    • Rank 4
      • 1.50 Ton
      • 4.85 ISEER
      • 842 Annual Units (for 1600 hrs)
    • Rank 5
      • 1.50 Ton
      • 4.75 ISEER
      • 839 Annual Units (for 1600 hrs)
    • Rank 6
      • 1.50 Ton
      • 4.74 ISEER
      • 850 Annual Units (for 1600 hrs)
    • Rank 7
    • LG-BS-18APZE
      • 1.50 Ton
      • 4.73 ISEER
      • 865 Annual Units (for 1600 hrs)
    • Rank 8
      • 1.40 Ton
      • 4.69 ISEER
      • 818 Annual Units (for 1600 hrs)
    • Rank 9
      • 1.50 Ton
      • 4.68 ISEER
      • 884 Annual Units (for 1600 hrs)
    • Rank 10
      • 1.50 Ton
      • 4.66 ISEER
      • 847 Annual Units (for 1600 hrs)
  • Best 1.0 Ton BEE 5 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 1.00 Ton
      • 5.80 ISEER
      • 483 Annual Units (for 1600 hrs)
    • Rank 2
      • 1.00 Ton
      • 5.80 ISEER
      • 474 Annual Units (for 1600 hrs)
    • Rank 3
      • 1.00 Ton
      • 5.75 ISEER
      • 492 Annual Units (for 1600 hrs)
    • Rank 4
      • 1.00 Ton
      • 5.20 ISEER
      • 512 Annual Units (for 1600 hrs)
    • Rank 5
      • 1.00 Ton
      • 4.86 ISEER
      • 557 Annual Units (for 1600 hrs)
    • Rank 6
      • 1.00 Ton
      • 4.86 ISEER
      • 560 Annual Units (for 1600 hrs)
    • Rank 7
    • LG-BSA12PMZD
      • 1.00 Ton
      • 4.74 ISEER
      • 584 Annual Units (for 1600 hrs)
    • Rank 8
    • LG-BS-12APZE
      • 1.00 Ton
      • 4.73 ISEER
      • 581 Annual Units (for 1600 hrs)
    • Rank 9
      • 1.00 Ton
      • 4.71 ISEER
      • 565 Annual Units (for 1600 hrs)
    • Rank 10
      • 1.00 Ton
      • 4.66 ISEER
      • 592 Annual Units (for 1600 hrs)
  • Best 2.0 Ton BEE 5 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 1.90 Ton
      • 4.85 ISEER
      • 1052 Annual Units (for 1600 hrs)
    • Rank 2
      • 2.00 Ton
      • 4.21 ISEER
      • 1288 Annual Units (for 1600 hrs)
  • Best 0.75 Ton BEE 5 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 0.80 Ton
      • 4.71 ISEER
      • 453 Annual Units (for 1600 hrs)
    • Rank 2
      • 0.80 Ton
      • 4.64 ISEER
      • 447 Annual Units (for 1600 hrs)
    • Rank 3
      • 0.70 Ton
      • 4.17 ISEER
      • 464 Annual Units (for 1600 hrs)

To know more about BEE Star Rating of Inverter Air Conditioners check this page on our website: Understand What is ISEER and Star Labeling of Inverter Air Conditioners in India

Best Ten Energy Efficient BEE 3 Star Rated Inverter Air Conditioners in India

Click on a category button below to choose category.

  • Best 1.5 Ton BEE 3 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 1.50 Ton
      • 3.99 ISEER
      • 1023 Annual Units (for 1600 hrs)
    • Rank 2
      • 1.50 Ton
      • 3.99 ISEER
      • 1023 Annual Units (for 1600 hrs)
    • Rank 3
      • 1.50 Ton
      • 3.99 ISEER
      • 1023 Annual Units (for 1600 hrs)
    • Rank 4
    • LLOYD-LS18AI
      • 1.50 Ton
      • 3.95 ISEER
      • 1000 Annual Units (for 1600 hrs)
    • Rank 5
      • 1.50 Ton
      • 3.95 ISEER
      • 1059 Annual Units (for 1600 hrs)
    • Rank 6
      • 1.50 Ton
      • 3.92 ISEER
      • 1008 Annual Units (for 1600 hrs)
    • Rank 7
    • LG-JS-Q18APXD
      • 1.50 Ton
      • 3.86 ISEER
      • 1041 Annual Units (for 1600 hrs)
    • Rank 8
    • LG-JS-Q18CPXD
      • 1.50 Ton
      • 3.86 ISEER
      • 1041 Annual Units (for 1600 hrs)
    • Rank 9
    • LG-JS-Q18VPXD
      • 1.50 Ton
      • 3.86 ISEER
      • 1041 Annual Units (for 1600 hrs)
    • Rank 10
    • LLOYD-LS19I3PI
      • 1.60 Ton
      • 3.84 ISEER
      • 1100 Annual Units (for 1600 hrs)
  • Best 1.0 Ton BEE 3 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 1.00 Ton
      • 3.99 ISEER
      • 669 Annual Units (for 1600 hrs)
    • Rank 2
      • 1.00 Ton
      • 3.94 ISEER
      • 692 Annual Units (for 1600 hrs)
    • Rank 3
      • 1.00 Ton
      • 3.90 ISEER
      • 663 Annual Units (for 1600 hrs)
    • Rank 4
      • 1.00 Ton
      • 3.86 ISEER
      • 680 Annual Units (for 1600 hrs)
    • Rank 5
    • LG-JS-Q12CPXD
      • 1.00 Ton
      • 3.86 ISEER
      • 691 Annual Units (for 1600 hrs)
    • Rank 6
    • LG-JS-Q12NPXA
      • 1.00 Ton
      • 3.86 ISEER
      • 691 Annual Units (for 1600 hrs)
    • Rank 7
    • LG-JS-Q12PWXA
      • 1.00 Ton
      • 3.86 ISEER
      • 691 Annual Units (for 1600 hrs)
    • Rank 8
    • LG-JS-Q12VPXD
      • 1.00 Ton
      • 3.86 ISEER
      • 691 Annual Units (for 1600 hrs)
    • Rank 9
      • 1.00 Ton
      • 3.80 ISEER
      • 688 Annual Units (for 1600 hrs)
    • Rank 10
    • LG-JS-Q12NUXA
      • 1.00 Ton
      • 3.72 ISEER
      • 729 Annual Units (for 1600 hrs)
  • Best 2.0 Ton BEE 3 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 2.00 Ton
      • 3.99 ISEER
      • 1359 Annual Units (for 1600 hrs)
    • Rank 2
      • 1.90 Ton
      • 3.98 ISEER
      • 1275 Annual Units (for 1600 hrs)
    • Rank 3
      • 2.00 Ton
      • 3.96 ISEER
      • 1367 Annual Units (for 1600 hrs)
  • Best 0.75 Ton BEE 3 Star Inverter AC (Click To Expand/Minimize)

    • Rank 1
      • 0.80 Ton
      • 3.94 ISEER
      • 536 Annual Units (for 1600 hrs)
    • Rank 2
      • 0.80 Ton
      • 3.87 ISEER
      • 531 Annual Units (for 1600 hrs)

Lesser known benefits of Inverter Technology

  • Regular motors need 3-4 times more current (more than running current) at startup. So the inverter/generator size needed to run any AC or Refrigerator increases significantly. But Inverter Technology air conditioners and refrigerators have variable speed motors that start up gradually needing much lesser current at startup. Thus the size of inverter/generator required to startup is less. For e.g. A 1.5 ton fixed speed AC that runs at about 10 Amp current may need up to 30 Amp current at startup and thus a 5 kVA inverter/generator. But an inverter technology Air Conditioner needs about 6-7 Amp current and not much more at startup and thus a 1.5 kVA or 2 kVA inverter/generator is good enough to support it.
  • Regular motors have much lower power factor. In commercial and industrial connections there is penalty for low power factor and rebates for higher power factor. An inverter technology motor will have power factor close to unity (or 1) which not only results in lesser electricity consumption but also help get rebates on better power factor.
  • If you are planning to use Solar PV for air conditioner, then it is the best to use inverter technology air conditioner or refrigerator as it not only reduces the size of PV panels because it consumes lesser electricity, it also reduces the size of inverter to be put along with the PV panel.

Here is a short video for tips to buy the best air conditioner in India




Here is a calculator for Sizing Air Conditioners in India

Select your city, dimensions of room, usage hours and sunlight checkboxes to get our recommendations. The inputs are on the left size and our recommendations on the right side. Also please note that these calculations are for a regular room in a house. If the room size is more than 400 sq ft then it would be better to call an engineer to do the evaluation.

Air Conditioner Sizing Calculator for India

(Note: This calculator is for a residential setup. It assumes a regular room with some furniture, basic appliances and 4 people in the room. Please do not use the numbers for a commercial setup.)


Check this if the ceiling of the room gets direct sunlight from top during the day.
Check this if West, South or South West walls of the room get direct sunlight during the day.


Please select a city
Size of Air Conditioner that you need:


Yearly Units ConsumptionYearly Electricity CostsApprox Cost of Buying
BEE 3 Star Non inverter
BEE 5 Star Non inverter
BEE 3 Star Inverter
BEE 4 Star Inverter
BEE 5 Star Inverter


Check this link to see Top Ten Air Conditioners in India for Electricity Savings: http://wp.me/p4hAhQ-4I


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Sir,I am planning to buy Daikin JTKM 50 Inverter AC.I live in Lucknow so saline air or voltage surge is not at all a problem.
But,recently I read about many Daikin inverter AC PCB's being blown up due to ants,mice and lizards and the consequences were hefty costs of repair of upto 15000.
So,should i go with Daikin JTKM 50 inverter model?

A quick revert would be highly appreciated.

Abhishek Jain (Mod)

Hi Akarshan,

PCBs of inverter ACs are expensive to replace. If they fail (whatever be the reason), you will have to pay a lot. Now it does not happen often that ants, mice, lizards get inside an AC's outdoor unit. But if it does, then it can cause problem in any AC. JTKM50 is a great AC otherwise.


First of all thank you for answering.

Just 1 doubt remains-

Could you please state certain measures to prevent such creatures from entering the outdoor unit.(Like I read it somewhere that one can apply Vicks vaporub on the inside of the outdoor unit to prevent them. IS IT SAFE AND WILL IT WORK?)

Abhishek Jain (Mod)

Hi Akarshan,

The outdoor unit is a box that contains condenser (heat exchanger) and compressor. As long as you do not put something that blocks the working of these units, it should be fine. So do not apply something directly to these two. Else you can certainly apply any rodent protection gel, etc.


1) Can a lake in the vicinity of 0.5 km be a potent cause for PCB corrosion?

2) Please suggest the best stabilizer for Daikin JTKM50 (1.5 TON)
to protect the PCB from getting damaged by VOLTAGE SURGE.

Abhishek Jain (Mod)

Hi Akarshan,

1) It may or may not affect. I have a lake close to my house which is less than 0.5 km. But nothing has happened to my AC in past 4 years. I have known people in my vicinity who have had inverter ACs for more than that as well. I cannot confirm if it can damage the PCB.

2) The choice of stabilizer depends on how low the voltage goes in your area. I can suggest you one, but then if voltage goes lower than its acceptable range then it will not be effective. So first you need to find how low the voltage goes in your area and then choose one accordingly. You can check this page: https://www.bijlibachao.com/appliances/voltage-stabilizers-buying-guide-best-tv-ac-fridge-home-guide-india.html


I prefer having a stabilizer with an inverter ac solely for the purpose of preventing voltage surge from damaging the PCB and not for actually regulating fluctuations since my area doesn't have any.

So could u please recommend a stabilizer for 1.5 ton inverter ac without considering the working range of the stabilizer since that range has no significance in my case.

Abhishek Jain (Mod)

You can go for VGuard VND 400 (Amazon Link: https://amzn.to/2ksOf4M )


Thank you very much for sparing your precious time for me and being so precise with your answers.

I must say that your website is a must visit for layman wanting to buy an ac.

Kudos to you and your team!!

Abhishek Jain (Mod)

Hi Akarshan,

Thanks for the good words. I am glad that you found the information useful.


My requirements-BEST IN CLASS PERFORMANCE(1.5 TON) with highest efficiency.

Abhishek Jain (Mod)

You can check Daikin JTKM50, Hitachi Kashikoi 5400i or Bluestar 5CNHW18PAFU.


Sir, we are planning on buying an AC and are confused between a 3 star and a 4 star Dual inverter AC's from LG.
The price between them differs by 10000 rupees. I was wondering in the long run if the electricity savings from a 4 star Ac would be more than the difference in the cost price. Please suggest. The room size is around 150 sq.ft will be using it for 5,6 months in a year around 6-7 hours per day.

Abhishek Jain (Mod)

Hi Aniketh,

For your usage 3 star inverter AC would be good enough.


Hi Sir,
i want to buy an inverter ac for my bedroom area 150sqr Ft so please suggest to me best ac.

Abhishek Jain (Mod)

Hi Rahul,

At Bijli Bachao, we suggest this strategy: First find out the right tonnage that you need for you room, because undersized AC may not cool well, and in case of non inverter AC, oversized AC can significantly increase electricity bills. In inverter ACs, slight oversizing is fine. You can use the calculator on this page to get the right tonnage: http://bijlibachao.com/top-ten-appliances/best-air-conditioner-ac-window-split-hitachi-lg-carrier-samsung-electricity-consumption-tonnage-in-india.html

Right tonnage depends on city, room’s location (if it gets direct sunlight on walls/ceiling or not), size of the room and number of people in the room, etc. Usually we assume 4 people in a room to do some calculations. But other parameters are required to be known to calculate the right size. A city like mumbai needs less cooling because temperatures do not go too high. But a city like Delhi needs more cooling because it is too hot in summers. Similarly a room on top floor getting direct sunlight on the roof will need more cooling as compared to a room on lower floors. So I would suggest that you use the calculator on this page to calculate the right tonnage.

After finding the right tonnage, you have to look at your usage of AC in hrs/year. And your budget. Because your usage determines if you need high efficiency AC or not (inverter or non inverter). Secondly we try to suggest the most efficient AC based on a person's requirement (tonnage requirement) and the budget.

Let me know the right tonnage (as per the calculator) and your budget and I can suggest you some models accordingly.


My house is at West Bengal.The temperature of the heating is 35c to 42c. My room size is also 10x12 sq. It's at the top floor. So tell me how much size will I get in the AC.

Abhishek Jain (Mod)


I would suggest that you use the calculator on this page to calculate the right size. It will provide you all the answers.


Also please tell can i run following Inverter Ac at my 1500VA modified size wave inverter?


Thanks in advance.

Abhishek Jain (Mod)

It's highest power input is 2300 Watts. So better go for 2.5 or 3 kVA inverter. 1.5 kVA will be less.


Thanks a lot bro for your kind prompt response.


I am very thankful to you for providing such valuable information. All your articles are well described and almost every bit of info is covered. Greetings and love from Pakistan.

Abhishek Jain (Mod)

Hi Umair,

I am glad that you found the information useful. Thanks for the good words.


Hello sir......I am planning to buy a 2 ton AC for my bedroom (approx 220 Sq. mt). In summer, my city (Jaipur) temperature goes upto 46-48 day & 35-38 night. Usage 8 to 9 hours at only night. so should I go for Inverter AC or Non-Inverter AC. Please suggest any brand.

Abhishek Jain (Mod)

Hi Sachin,

Is the room 220 Sq mt or 220 Sq ft? Because 220 Sq mt is huge! If you plan to use it only at night then 2 ton inverter AC would be good. You can look at these ACs:

Hitachi RMB324IAEA
Blue Star 3CNHW24TAFU


it's 220 Sq.FT....what about 2 ton LG dual inverter AC.... please guide about electricity consumption in LG dual inverter AC and 3 star non inverter AC. Usage 8 to 9 hours at only night. My local dealer tell me that there is no requirement of stabilizer for dual inverter AC..... is it right???

Abhishek Jain (Mod)

Hi Sachin,

LG 2 ton inverter ACs are not really 2 ton. They are 1.7 or 1.8 ton AC. In fact most brands mark 1.7/1.8 ton as 2 ton. Your room size is big and that is why I suggested true 2 ton ACs (so that just in case you use in day time it will work well). If your usage is only at night then you can go for LG Dual Inverter AC as well. And yes they do not need a stabilizer. In fact most inverter ACs do not need a stabilizer, but models from LG and Samsung have great voltage protection features.


Hi Moderator / Abhishek Jain, First, a big Kudos for your patience and detailed, at times repeated questions' responses. Hats off to your interest to address people's all questions. My question is, I got a Hitachi RSD318EAEA recently. Wondering about the inbuilt stabilizer. Does it have the capability to find out if the power outage and resumption happened just a few min back only? Like stabilizers having the delayed start (2-3minutes) so the AC compressor is not strained in case of power resumption within 2-3 minutes of outage while AC was running, cooling. Thanks in advance.

Abhishek Jain (Mod)

Hi Jayakumar,

Most modern ACs have inbuilt time delay to handle power outages and other situations. So yes, it would have a time delay.


maintaing cost of inverter is high compare to normal 5 star ac?

Abhishek Jain (Mod)

Yes it would be.


hello sir,
Can you explain me the cost of ownership between normal air conditionar vs inverter air conditionar.
so on which the cost of maintaining is high. Either i go for copper condenser or aluminium/Alloy.

Abhishek Jain (Mod)

Hi Aman,

I would suggest that you use the calculator on this page to understand the cost of ownership of different star rated air conditioners.

For copper and aluminium, let me copy some text that I use to reply most people having confusion about copper and aluminium:

There are two type of condensers: PFC and copper condenser. We have explained PFC and copper condenser in detail on FAQ no 13 on this page: .

You can get more details like pictures on that page. Here is the text from it:

a) PFC (Parallel Flow Condenser) or Multi Jet which is all aluminium. It is highly energy efficient (more than tube and fin condenser) but if it fails it need to be replaced. It can get damaged due to corrosion and thus needs good corrosion protection. Manufacturers specifically mention PFC or Multi Jet.PFC is a good technology from energy efficiency and costs point of view. And both copper and PFC will fail in case the environment is corrosive. It is just that copper ones can be repaired while PFC needs replacement. And because there is hassle and expense related to replacement (which only happens in case of corrosive environment), Aluminium has got some bad press. But it is not that aluminium fails always.

b) Coil and Fin type condenser, where coils are copper and fins are aluminium. Even in this the one with anti corrosion coating (also known as blue fin/gold fin) is better. Most brands have such type of condenser. You can ask the dealer to open the outdoor and indoor unit for you and you can check if it looks blue or not.

Please NOTE: Both copper and aluminium can corrode and in fact the coil and fin having two metals can corrode faster. The most important thing to look for is corrosion protection and not just copper or aluminium.

Also all depends on level of corrosion. If you live close to sea then corrosion is faster. I have personally used Aluminium ACs in Powai, Mumbai (about 6-7 kms away from sea) and never faced any corrosion issue. But people living on say worli seaface, Mumbai (right on the shore) always have direct winds from sea which can cause corrosion.



Hello, this article is very informative still I would like to seek your guidance in buying an inverter AC. As you know sales are on peak due to upcoming GST norms & I'm positively looking to grab a quick deal in the process. My requirements are as follows-
Location- Mahim, Mumbai (far from Mahim bay)
Summer- 16-18 hours/day from Feb-May and probably in Oct depending on heat
Rainy- 6-8 hours/day from June-Sept/Oct.
Winter- 4-5 hours/day from Nov- Jan

The above usage has been calculated from experiences so far using 5 star window AC which definitely has put a big hole in pocket so far.

Tonnage- 1
Inverter- Yes
Brand- Any
Budget- <33k

Can you recommend a model from following page on amazon-

Also, planning a visit to VS, Croma & Kohinoor in hope of cracking good deal.

Thanks for reading.

Abhishek Jain (Mod)

Hi Nimish,

Considering Mumbai electricity tariffs (which are really high), your usage of AC is quite high and it will be better if you go for a BEE 5 star rated inverter AC of 1 ton. I think Blue Star 5CNHW12PAFU (Amazon Link: http://amzn.to/2spb3oB ) is a great choice and quite well priced. But then you will have to increase your budget by 5K. But it will be really worth because your usage is high. Otherwise the best brand in your budget to get a BEE 3 star rated inverter AC would be LG. You can get models with decent energy efficiency at budget price. But then your usage is high so I would suggest going for a more efficient model.


Hello, I am SHAMEER from Chennai planning to buy an split ac for a room size of 130sq.ft in ground floor(G+1) and having windows facing west and east, should I go for 1.5ton or 1ton. Or Hitachi 1.2 Ton 5 Star ZUNOH 5200f -RAU514AWD is enough. Please tell me some models from carrier and blue star if I should go for 1.5ton

Abhishek Jain (Mod)

1.2 ton is enough for your room. You can go with Hitachi 1.2 Ton 5 Star ZUNOH 5200f -RAU514AWD.


thank you, will there be any issue relating to spares parts availability in future due to 1.2 ton

Abhishek Jain (Mod)

No. There should be no issue in buying a 1.2 ton AC.


Hello sir I bought yesterday an LG 3 star inverter ac (JS-Q12BPXA) and I live in Andheri Mumbai. Do I need a stabiliser for this particular AC? The AC page says It can operate without stabiliser in range of 145-290V. If fluctuations are beyond that, then we'll need a stabiliser. So would I need one for this?

Abhishek Jain (Mod)

There is no power fluctuation in Mumbai. You do not need a stabilizer for this AC.


Hello, I am Viplav from Chandrapur(Maharashtra) about 150Kms form Nagpur. I am planning to buy Split AC for my Bedroom of 15*10 ft, no direct sun light from Top & on Walls. In summer, my city temperature goes upto 48-49 day & 32-35 night. so should I go for Inverter AC or Non-Inverter AC. And I have heard that after certain external temperature Invertor AC stops or it wont cool properly. Is it true??
Daikin, Blue Star, Panasonic or Godrej what should I prefer...

Abhishek Jain (Mod)

You need a 1.5 ton AC for your room. Inverter AC should not stop at any external temperature as long as the temperature is withing its operating temperature range. Certain ACs have low operating temperature of 46-48 degrees and some have high (as high as 52). And this is the case with both inverter and non inverter AC. What is your budget for this AC?


Good if it is less.. but I can manage upto 45k-50k.

Abhishek Jain (Mod)

You can look at these models:

Panasonic PS18SKY
Blue Star 3CNHW18TAFU

These would be really good.

Gaurav Chaturvedi

Hi Abhishek
I live in Mumbai and am looking for 2 units of 1.5T AC for my flat. I had selected Daikin JTKM50 and placed the order with their dealer about 20 days back. However the dealer informs me that due to high consumption and low production of this model he will not be able to deliver same. That puts me on the hunt for AC again. My budget is INR50,000 per unit including installation. Can you advise the difference between JTKM50 and FTKM50 models of Daikin. Which other models would you suggest in this budget.

Thanks and brgds

Abhishek Jain (Mod)

Hi Gaurav,

FTKM50 would be the next best model from Daikin after JTKM50. The difference is that JTKM50 has air purifier built in and it is also a bit more energy efficient. But then Daikin FTKM50 is not bad at all. You can also look at Blue Star 5CNHW18PAFU (Amazon Link: http://amzn.to/2sLEJQk ) ... it is quite energy efficient, had good air filters and in general a good and value for money option.



I have recently bought LG 18NUXA 1.5 ton inverter ac. I thought it will be more energy efficient. However I see it consumes 1840 Watts of power and has running amps of 8.4. When I compare it with other ACs even if non-invertor, I see the power consumption is around 1650 watts and running amp is 7.1 to 7.9. Does this mean LG 18NUXA will consume more power and is less energy efficient? I am satisfied with AC's performance though.


Abhishek Jain (Mod)

1840 watts is peak power consumption. The power consumption will vary based on the heat load. I would suggest that you read about the working of inverter AC above and then evaluate.


we bought lg 1ton inverter 3star ac and we are installed in 100 sq.ft room.we are new user of airconditioners so we decided to go with inverter series due to low energy consumption but after using for 2 months we get 3500 additional charges with my usual eb bill, SO MY QUESTION IS WHERE IS THE ENERGY EFFICIENCY IN THESE? and WHY I PAID EXTRA 20k for the inverter series,what benefit from the inverter ac, NOTHING RIGHT?

Abhishek Jain (Mod)

Hi Abishek,

Let's take an example to help you understand your situation. Imagine you are used to driving a two wheeler that gives a mileage of 75 km/lt and then you decide to buy a car. Now you buy a good fuel efficient car that gives a mileage of 18 km/lt. But when you use it, you feel that you have spent a lot of petrol. Now the big difference here is that cars do consume much more fuel as compared to a two wheeler. The moment you add an AC, your electricity bills are bound to increase. You cannot add an AC and expect that bills will not increase much.

Adding another dimension to the above analogy is the usage. If your usage of car is high, even the most fuel efficient car will consume petrol. Similarly, even if you get most energy efficient AC, it will consume some electricity to run. Your electricity bill increased by about 1750 per month. Now I am not sure which city you are in and what is your tariff. But on an average if I assume Rs 7 per unit, the consumption in a month is 1750/7 = 250 units. Which is roughly 8 units a day. 8 units a day sounds reasonable for 1 to 3 star inverter AC if your usage is about 14-16 hrs.


waiting for ur valuable reply sir


Hi Bijli Bachao team,

Thanks for all your excellent efforts here. Early this year I bought an inverter AC on your reccomendation and I am quite happy about it. I bought Daikin FTKM50 5-star inverter.
Now I need one more AC for my living room. I live in Noida in a high rise, where summers are dry and corrosion is not an issue. Also power cuts are minimal. The tonnage calculator is giving me a size of 3.0 tons for my living room, but I do not see any residential AC of that size. The closest I see is Daikin FTKP71 2.2 tons 4 star inverter for a price of 65K including installation. My question is:
1. Is Daikin a trusted brand, and should I go for it again. Although my Daikin AC is working fine but its only been a couple of months since I am actually using it.
2. What are others options in this tonnage?
3. Can I go for 2 tons, where I get more options, as for living room we need it to be comfortable and not cold like bedroom.

Please suggest a suitable AC . I am assuming that Inverter tech would be best, please advise if you think otherwise.

Thanks a lot.

Abhishek Jain (Mod)

Hi Saurabh,

Here is my response:

1) Daikin is a premium brand and certainly a trusted one. Rest all depends on your choice. You may try other brand as well.

2) I would not suggest you to undersize an inverter AC as it will not give desired electricity saving benefits. Also if your usage of AC is not high then you may not need an inverter AC.

3) If your room needs 3 ton and if you install a 2 ton AC, then it will not cool the whole room. The corners of the room which are farthest from the indoor unit will not receive enough cooling. So it will be better if you install it close to the seating area. You can go for a 2 ton AC with an understanding that it will not cool the whole room. And yes, its electricity consumption will be on a higher side because the compressor will hardly get time to rest (it will have long cycles). The best thing that you can do is to go for an AC with 2 ton capacity, BEE 5 star rating (for less electricity consumption), non inverter and with long air flow. Models from Mitusbishi (Mostly mitsubishi heavy and a few mitsubishi electric) have long air flow to cover a larger area. But then MItsubishi models are also super expensive. You may optionally go for any 2 ton AC which is BEE 5 star rated non inverter (in case cost is an issue).


I am from Rajkot city (Gujarat), planning to buy split ac of O General or Mitsubishi Electric for my living room having 260 carpet area and 10 Ft. height, no direct sunlight from top and on walls. Usage will be for daily 5 hours for 5 months. Kindly suggest which brand should i choose, as well as suitable Ton, Star rating, inverter or without inverter split ac should i go for ?

Abhishek Jain (Mod)

Sorry. Not that O General model. You can look at Mitsubishi Electric MS-GK or MS-GL series.

Abhishek Jain (Mod)

Hi Akash,

Both Mitsubishi electric and O General are good. Your usage is not very high, so you can go for non inverter Split AC. I think Mitsubishi Electric will have more energy efficient options, however, O General is quite sturdy. You can go for 2 ton model from O General ASGA24FUTA


Dear Mr.Jain
We r thankful to you about your awareness programme and saving electricity and environment.
I want to buy 1 ton inverter ac.i live on 2nd floor and A drian is 600 mtr away from my home.my budget under 30k.i have shortlisted sansui Hyundai, mitashi whirlpool inverter ACS.if you can suggest me top 3 model according to my requirement.
Thanks in advance.

Abhishek Jain (Mod)

Hi Neeraj,

If there is a drain then I would suggest that first you check with your neighbors who own ACs to find if there is regular leakage of gas or not. If there is regular leakage then the environment would be corrosive and I would not suggest you to go for inverter AC. If there is no regular leakage then you may go for a 1 ton inverter AC. Just check with people and let me know and I can suggest something accordingly.


I found Lg services r good here and blue star is also good.pls suggest any model of lg with 5 star ac

Abhishek Jain (Mod)

I would suggest that you go for Bluestar as they have good corrosion protection. You can look at these models from Bluestar: 5HW12SBTU , 5HW12ZBRTU , 5HW12ZBWTU


I am planning to buy an Air conditioner for my parents. The room size is 110 sq feet with height 10 ft situated in top floor with two window facing west and south each. My local ac dealer suggest me to go for 1 ton 3 star ac. But based on my research some said 1.5 ton would be good rest suggested for 1 ton. Could you please help me with this?
Mostly ac would be used for 8 hours/day during sleep hours.
Suggest me if I can go for 1 ton inverter ac as in some website it says 1 ton inverter can work for upto 1.2 ton capacity till cooling or If i should go for 1 ton or 1.5 ton non inverter ac.
Due to my budget constrain I have looked up below models.
http://www.onida.com/air-conditioners/GUSTO%20-%20INV12GSO -- 29K in my local dealer
http://www.onida.com/air-conditioners/GUSTO%20-%20SA123GSO -- 25K in my local dealer
Above models are 100% copper and has R410a gas
Could you please go through the above model and let me know whether i can go for above models or any other suggestion.

Abhishek Jain (Mod)


Which city are you in? The size of AC will depend a lot on that. I would suggest that you use the calculator on this page to calculate the right size as the calculator takes in a lot of parameters that are required to calculate the right size. Inverter ACs can extend to up to 0.2 ton more than the marketed size. Let me know the size as per the calculator and your budget and I can suggest you some models.


Hello Abhishek,
As per the calculator the right size suggested by it is 1.5 Ton (For cooling requirement of 1.2 Ton) and My budget is around 28- 32K.

Abhishek Jain (Mod)

In that case you can even go for 1 ton inverter AC, because 1 ton inverter ACs can extend to 1.2 to if needed. If you need popular brands then you can look at these:

Whirlpool 1 ton Fantasia inverter AC (Flipkart Link: http://fkrt.it/2lU0q!NNNN )
LG JS-Q12BTXD (Flipkart Link: http://fkrt.it/2lqLO!NNNN )
LG JS-Q12BPXA (Flipkart Link: http://fkrt.it/2zM9g!NNNN )

If you are fine with lesser known brands then you can look at these:

Onida INV12IRS (Flipkart Link: http://fkrt.it/2zykg!NNNN )
Sansui SS4C34.WS1-CM (Flipkart Link: http://fkrt.it/2HKJX!NNNN )
Hyundai HS4I54.GCO-CM (Flipkart Link: http://fkrt.it/Lr0R4TuuuN )
Mitashi MiSAC10INv20 (Flipkart Link: http://fkrt.it/2Hluj!NNNN )


I have a Carrier 1.5 ton (Ester) AC - I had temporarily shifted to a residence and will be here till 3 months. Since its a temporary shifting, I had not installed the AC here (it was uninstalled from the old location). Can it lay still for 3 months or will this cause any problems to the electrical components of the AC

Abhishek Jain (Mod)

Depends on how it is kept. If the environment (where it is kept) is not corrosive, then there should be no problem.


Which one will be better?

2. Daikin-FTKH50SRV
3. Hitachi-RSD318EAEA

Abhishek Jain (Mod)



Please suggest from below models
2. Daikin-FTKH50SRV
3. Hitachi-RSD318EAEA

Abhishek Jain (Mod)

Hitachi-RSD318EAEA would be the most efficient.


Hi Abhishek
Thanks for your reply. I have to add another ac in that list. Bluestar RBFU series BI-3HNHW17RBFU/
BO-3HNHW17RBFU .Can you please tell me about this ac.

Abhishek Jain (Mod)

Hi Avik,

Purely from efficiency point of view Hitachi has the most efficient BEE 3 star rated ACs. Bluestar is also a really good brand. Among the models that you have selected, Daikin FTKH is the only one with really low efficiency (among all). But otherwise you can go as per your brand preference. Hitachi is also a premium brand and being the most efficient makes it a good choice.


Hi Abhishek

Thanks for your reply. I have done enquiry in my locality for after sale service for hitachi ac. Everybody is saying it is pathetic. Can you share your views about lg model.

Abhishek Jain (Mod)

Hi Avik,

LG JS-Q18NUXA would be your next best options. It has good ISEER of 3.86 with copper condenser. And in general LG models are good in handling voltage and also have good air filters as well. The dual inverter tech can also help achieve lesser noise. You can certainly go for it.


Dear Bijli Bachao team,
Firstly, thanks for this blog. I live in Udaipur city about 1 km from the lake. We have 2 rooms, each of which by your calculator need 1.5 ton ACs. One of the rooms is inside with no windows to the outside. There is a narrow doorway connecting the 2 rooms. I am thinking of installing a multi split AC for the 2 rooms.
1. Since one of the rooms is far away from the outside walls, is this even possible?
2. Can we use an AC in one room and a cooler in the other with the door open?

Abhishek Jain (Mod)

Here is my response:

1) It is certainly possible to have longer piping. You just need to fill in extra refrigerant (or go for slightly bigger AC ... say 2 ton if requirement is 1.5 ton).

2) I would not suggest to keep the door open because a) if the door is open, then the heat load of the full area is to be taken while calculating AC tonnage. b) AC works by removing humidity while cooler works by adding humidity. So both should not be used together.


Which brands would you suggest me for inverter ACs for around 30-40k and the reasons for these brands?
Also some good >=3 star inverter ACs around 30-40k.
Are there any drawbacks with inverter ACs that I should be worried about, or any drawbacks for that matter?
Thanks in adv :)

Abhishek Jain (Mod)

What tonnage are you looking at? The only time we suggest to avoid inverter AC is when someone lives in a corrosive area. Which is close to sea, river, lake, any other water body or a chemical factor. This is because there is a PCB in outdoor unit of inverter ACs which is prone to corrosion. And the repair is expensive.


1.5 ton.
Also, is copper condenser really worth the extra price? If so, please suggest 1.5 ton inverter ACs with copper condenser.

Abhishek Jain (Mod)

Within 30-40K and in 1.5 ton, the best option you have is to go for LG inverter AC of 1.5 ton. Their efficiency is high and features are also really good. You can get copper ones from LG as well in your budget. Copper in general is easier to repair in case of damage. Aluminium needs replacement in case of damage. And that is why people prefer copper. Here are some models that you can look at:

LG JS-Q18ATXD (Amazon Link: http://amzn.to/2plxzkK )

LG JS-Q18AFXD (Amazon Link: http://amzn.to/2oA2VBg ) similar model with different design

LG JS-Q18CPXD (Amazon Link: http://amzn.to/2oA7Ban ) ... this is an Amazon only product and I doubt you will get this in market.

LG JS-Q18NPXA (Amazon Link: http://amzn.to/2oA6Nm5 )

LG JS-Q18SUXD (Amazon Link: http://amzn.to/2oMG2Le )

LG JS-Q18AUXA (Amazon Link: http://amzn.to/2oMjWqB )

IN this models with SU and AU in name are copper.


Thanks Abhishek, these seem like some good models.
Is LG a good brand for ACs though?
If I extend my budget till 45k, will I get any better models? How are carrier, daikin ACs in this range?

Abhishek Jain (Mod)

Carrier does not have a BEE 3 star model and BEE 4 star and above are expensive (more than 45K usually). Daikin has a BEE 3 star model which is not as good. Their 4 star model again would be expensive. However, you can look at these BEE 3 star models which may fit in your budegt and would be really good:

Hitachi RSH318EAEA (Amazon Link: http://amzn.to/2oKrNrZ )
Panasonic PS18SKY
Blue Star 3CNHW18TAFU
Blue Star 3CNHW18NAFU

LG is also a good brand. They are market leaders (in terms of number of units sold) in Air Conditioners (along with Voltas).


Ya LG seems reasonable too. I think i'll go with LG then. Finally, just could you tell me how good is this one:

Abhishek Jain (Mod)

Carrier model would be better.

Abhishek Jain (Mod)

This one will be better than LG.


Alright, thanks again for the help Abhishek, and sorry if I accidentally reposted the same comment.


Sorry I didn't understand the inverter technology. The current that comes in the mains power supply is AC. The inverter then converts it to DC and feeds it to the compressor? But I thought an inverter converts DC to AC. Secondly, people who live in areas that have a lot of power cuts also buy inverters. If I have understood it correctly, that is something different from the inverter in air-conditioning technology, right? There, the battery is charged using the mains power supply, and when there is a power cut, the current from the battery is converted to AC by the inverter and fed to the appliances. Please clarify. And thanks for this great article. :)

Abhishek Jain (Mod)

BLDC motors in Inverter Technology ACs works by altering frequency of the AC (current). The incoming AC is first converted to DC using a converter, then the power factor is corrected and then finally the DC is again converted back to AC (of desired frequency) using an "Inverter" (which converts DC back to AC of desired frequency). And that is why it is called "inverter technology".

As you got it right that Inverter is something that converts DC to AC. A power inverter used at home charges the battery and then electricity stored in the battery is used to power the appliances. DC from battery is converted to AC (useful) using an "inverter".

There is no battery in inverter tech ACs. So they do not store any electricity. The purpose of "inverter" in air conditioner is just to convert DC to AC of desired frequency.


Thanks for the explanation!


Abhishek Jain (Mod)
Hi Venky,
Daikin ETC50 would be better. It has best efficiency numbers, plus Daikin is a great brand. I think you should go with Daikin ETC50.


Thanks. Mr.Jain. Bluestar sales person talks about double layer copper coil. Blue film protection for indoor and outdoor coils. Will this feature be better as compared to Daikin ?, Pls advise.

Abhishek Jain (Mod)

Blue Fin corrosion protection will matter if you live in a corrosive area (close to sea, lake, river, nallah or chemical factory). Else it may not be too important.


Hi Abhishek,
I live in Kolkata. My home has 12 inches of thick Wall on the outer side and it receives no direct sunlight. Room dimension are 15*10*12. I have Voltas AC in our bedroom since 2010. For the last two years the Electricity bill for the month May have increased from Rs3500 to Rs7000 to Rs11240 this year. For the last two years I am also facing problem with Voltas AC as its requires gas to be filled yearly. Now i want to change the Ac. Please suggest, should i go for inverter or non inverter. I am inclined towards Daikin and Bluestar (after reading stories of after sales service of Hitachi)

Abhishek Jain (Mod)

Hi Ayan,

It will be good for you if you buy and inverter tech AC. What is your usage and how much if your budget? My guess is that you would be looking at 1.5 ton AC (you can evaluate the same using the calculator on this page).


Thank you very much for your information.


Hi Abhishek
I have short listed 2 AC 1.5 Ton
Daikin 5 star Inverter Ac JTKM50SRV16
Daikin 5 Star AC ATF50SRV16
I know 1 of them is Inverter n other is Non Inverter Ac my Question is I live in Mumbai (Mumbra) where there is Frequent Power cut daily. What would u suggest will be better choice for me Have heard that PCB Circuit of Inverter Ac is very Sensitive n gets Damaged easily due to power cut or Fluctuations. Is this true ???
Which would be better choice for me
Also give ur suggestion on these 2 AC Models in terms of Quality n Features which is better.

Abhishek Jain (Mod)

Hi Naveed,

The biggest problem for PCB comes from corrosion. If you live close to sea/river, then you should avoid inverter AC. Else inverter ACs are quite good. You can protect it by using a surge protector, something like this: http://amzn.to/2sGOcpR

Also I have heard about some issues with Daikin JTKM50. I think you can go with Blue Star 5CNHW18PAFU. It is a good AC.


Plz recommend a split inverter ac, i am from punjab , city Mukerian-144211

Abhishek Jain (Mod)

Hello Rajiv,

At Bijli Bachao, we suggest this strategy: First find out the right tonnage that you need for you room, because undersized AC may not cool well, and in case of non inverter AC, oversized AC can significantly increase electricity bills. In inverter ACs, slight oversizing is fine. You can use the calculator on this page to get the right tonnage: http://bijlibachao.com/top-ten-appliances/best-air-conditioner-ac-window-split-hitachi-lg-carrier-samsung-electricity-consumption-tonnage-in-india.html

Right tonnage depends on city, room’s location (if it gets direct sunlight on walls/ceiling or not), size of the room and number of people in the room, etc. Usually we assume 4 people in a room to do some calculations. But other parameters are required to be known to calculate the right size. A city like mumbai needs less cooling because temperatures do not go too high. But a city like Delhi needs more cooling because it is too hot in summers. Similarly a room on top floor getting direct sunlight on the roof will need more cooling as compared to a room on lower floors. So I would suggest that you use the calculator on this page to calculate the right tonnage.

After finding the right tonnage, you have to look at your usage of AC in hrs/year. And your budget. Because your usage determines if you need high efficiency AC or not. Secondly we try to suggest the most efficient AC based on a person's requirement (tonnage requirement) and the budget.

Let me know the right tonnage (as per the calculator) and your budget and I can suggest you some models accordingly.


@bijlibachao team .... kudos to the detailed analysis done by you guys ....brings out lucidly the aspects one should look at while buying a split AC. But I would like to add another angle to the analysis and would request your comments on the same. This is the Output that I got for some room input parameters:-

Yearly Units Consumption Yearly Electricity Costs Approx Cost of Buying

BEE 3 Star Non inverter 1204 8789 32383
BEE 5 Star Non inverter 1102 8045 37673
BEE 3 Star Inverter 1050 7665 40317
BEE 4 Star Inverter 948 6920 45606
BEE 5 Star Inverter 795 5804 53540

Now lets calculate the difference we accrue between a 3* Inverter AC & 5* Inverter AC. Difference in electricity bill is Rs 1861/- (7665-5804) yearly. And difference in purchase cost Rs 13223/- (53540-40317). So I pay 13223/- extra upfront for 5* Inverter AC but save only Rs 1861/- yearly. So 13223/1861=7.12 years...lets round it off to 5 years. That means if I buy 3* Inverter AC and use it for 5 years then I reach the cost of 5* Inverter AC (@present rate). I know these are approximations but just another oblique thought process :) and I would like you to give your insight on this.

Abhishek Jain (Mod)

Your observation is quite true and these numbers are also median numbers (from all the data that we have collected). We have tried giving some numbers to make a judgement, but then the real difference comes in when you are comparing two models. For e.g. if you are planning to buy a BEE 3 star rated inverter AC of 1.5 ton, then you can get an LG model with ISEER of 3.89 for 35K as well. While a Hitachi BEE 5 star inverter of ISEER of 5.15 would cost 60K. The difference is huge, however one fact to consider here is that the price also includes brand premium (in case of Hitachi). Another example would be if you look at Hitachi BEE 3 star rated inverter AC of 1.5 ton with ISEER of 3.99, it costs about 44K. Whereas Blue Star P series 1.5 ton BEE 5 star rated inverter AC with ISEER of 4.75 would cost only 49K. And Blue Star is also a great brand (Indian though).

So real ROI calculation can be done only when you are comparing two models as pricing includes a lot of things. You can even get a 1.5 ton inverter AC of Hyundai or Sansui for 30K. Which are efficient too.

But the problem that we face is that most people come and ask if they should go for 3 star inverter or 5 star inverter. And people are just looking at an answer which is independent of a brand. It is quite difficult to answer that. And that is why we took median values to do the calculations.


Hi Abhishek,

My Hitachi Window AC 1.5 ,6 years old with good coil condition. Is showing increasing ampere in the meter which reach at level of 12 and after that compressor trip. So ,as per engineer it is compressor dead indication. So, my question is should I change the compressor which cost approximately 10,000 and use it for next 2-3 years. OR you recommend to go for a new AC.


Before you take that decision do check a few more things....(1) Whether the stabilizer you have is giving correct & appropriate output. (2) The input voltage at the AC point is optimum and on giving it load, if there is a drop. In case there is a drop then there are chances of fault in the wiring, neutral at mains loc, etc. (3) Proper servicing of the AC (which I take that you would have got done).
If all is good, then yes the compressor is kaput.

Abhishek Jain (Mod)

It will be better to go for a new AC. You will get an air conditioner which will be far more energy efficient than your old AC.


@bijlibachao team, hats off to your input and industrious undertaking of ACs, i was thinking about buying an AC as the heat is climbing , and i will now pause for a moment and wait little bit longer to avail the right choice , Take a Bow.


My budget is 35000 for a 1.5 T split. ( 3 star, copper coil ). The following models appear to be good to me. Blue star 3HW18BTU, VOLTAS 183LYA DAIKIN Model: ETC50SRV16. Please let me know which is better. Suggest if there are some alternatives. Thank you.

Abhishek Jain (Mod)

Hi Venky,

Daikin ETC50 would be better. It has best efficiency numbers, plus Daikin is a great brand. I think you should go with Daikin ETC50.


Hello, Abhishek !
Please,suggest an AC for my room.
I live in Bangalore, room size 13*19*9 (excluding wardrobe and bathroom ),no direct sun on walls,but direct sun on roof.2 big windows on east side & 1 window on north.Usage of AC :6 months per year (during summer) , 8 hours daily.
Which models and tonnage would You suggest for me ,both inverter and non- inverter?
My budget is up to Rs 60000.

Abhishek Jain (Mod)

Is the size 13x19x9 or 13x9x9. If it is 13x19x9 then you need a 2 ton AC for the room. You can look at these:

Non Inverter:

BrandModelAmazon Link




Hello Sir,
I am from kolkata, where we have very hot and humid summer. Because of factories and adjacent river(around 2.8 km) the area is prone to corrosion. Assuming so, I am ditching the plan of buying inverter AC. Planning to install two static split AC of 1 - 1.2 ton each as the rooms are 10 X 12 ft.
Room 1:- Ground floor ; no direct sunlight
Room 2 :- Topmost Floor ; tends to have high temperature.
Usage:- 6 months a year esp. in summer time. approx 9 hrs.

could you provide models with efficient cooling , low power consumption and low on maintenance from popular brands(Voltas,LG,Bluestar,Hitachi,Daikin,samsung) ??

Thanks & Regards,

Abhishek Jain (Mod)

I think Blue Star and Hitachi would be your best bet if you are in a corrosive area (or daikin model with corrosion protection). You can look at these in 1 ton:


In 1.2 ton you can look at these:

BrandModelAmazon LinkFlipkart Link

Thanks a lot for your valuable suggestion.
I made a mistake, the top most floor is of 12 X 12 ft and there is nothing above it and direct sunlight also. Will 1 or 1.2 ton AC will be enough or should I move to 1.5 ton ? Because I read somewhere that AC compressor will be stressing out to maintain the temperature while will affect the longevity of AC and also energy saving will be less. Please correct me if I am wrong. Thanks.

Abhishek Jain (Mod)

You should use 1.5 ton AC for that room. Although slight undersizing will not be too bad in case of fixed speed ACs. The compressor will run a bit longer, but then that would not be too bad as well. But then cooling would be slow and not complete. So it is better to go for 1.5 ton. You can look at these:

BrandModelAmazon LinkFlipkart Link
HITACHIRAU518MWD http://fkrt.it/dpC1ZTuuuN

Thanks a lot... and keep up your good work.. team bijli bachao :)


AC with Aluminium coil is cheaper compared to Copper coil. Is there any difference in energy efficiency ? Will there be degradation to material and efficiency in longer run ? LG claims to use Alloy not copper Is this alloy better than copper ?

Abhishek Jain (Mod)

Aluminium technically should be more energy efficient than copper. Durability is a question in case of corrosive environment though. Degradation (derating) happens in all ACs. Premium brands have lesser derating especially in copper models. But then if you get an LG AC which has aluminium with higher efficiency and may be at lesser cost, then it still works better than going for lower efficiency model with higher cost. Unless the environment is corrosive and there is chance of complete damage to condenser (in case of aluminium), LG Alloy may still work out better in many cases.


Hi Mr. Abhishek,
During my search for collecting information for AC before buying, I saw your website. Your efforts are really appreciable to help people to buy a right AC as lots of companies; a number of models with either similar or varying specifications and interaction with sales in the market only confuses a layman. I am living in Bhavnagar (Gujarat), hot; (Bhavnagar is coastal area though vary far away from living place); room size is 15 x 10 ft., thick walled, sunlight from morning to noon at East facing wall, second floor. The use will be mainly during summer months (~4 months) and during night hours at ~ 25 oC ( except Sunday when both day (few hours) and night cooling will be required by two users; room has not very much occupied by things. I need a AC with long life, energy efficient with minimum sound (if possible no sound). Which company u will suggest ? I am thinking for Blue star/ Mitushibi. One salesman told AUX ( Japenese; all spec similar to Mitushibi from same company but low cost becoz new in the market only from 3 years ) even better than Mitushibi. One said 'Lloyd' has no sound. Here salesman told that there is no star rating in inverter. But by reading your website and your responses, I came to know that it is there. What is the difference between different models of same star rating, same tonn capacity of same company, e.g. different model for 3 star, 1.5 tonn. should I go to 3 or 5 star or inverter? and which model of which company ? Thanks.

Abhishek Jain (Mod)

Hi Prashant,

Each star rating represents a range of energy efficiency. So a BEE 3 star inverter AC would be anywhere between 3.5 ISEER to 3.99 ISEER. So even a model with 3.5 ISEER will be 3 star and one with 3.99 will also be 3 star. However, model with 3.99 ISEER will be more electricity saving than model with 3.5 ISEER.

Inverter ACs are in general quiter and thus going for inverter AC would be better. Your usage is not very high so BEE 3 star would be fine. You can go for Blue Star or Mitsubishi Inverter ACs. However, Mitsubishi inverter ACs would be BEE 5 star and expensive as well. It is a great brand and if you want to go for it, you can very well go for it. MSY-GK18VA would be a great choice. But I think Blue Star T Series 3CNHW18TAFU or N Series 3CNHW18NAFU would be really good. These are BEE 3 star rated model. T Series has slightly better efficiency while N series has slightly more cooling capacity. Both will be good.


hello again.
and sorry for the inconvenience. we talk earlier regarding ac's . i can't emaill you from my last id .
i am still on hunt for right ac. whenever i go to purchase Salesman put something new and we got confused. i ask about daikin they show samsung or electrolux. Anyways.
WHAT is the 8 pole motor. i want your opinion on SAMSUNG MODELS, which are ARISMVJHETR 1.5t AND ARISMV5HGWK.( Image attached.) Is this really best Ac's in 1.5t sagment.
salesman says it is the best ac with best service ? 8pole motor is latest technology which is used by samsung.
i can't see any of your comment on samsung Ac's.
and What is the service feedback regarding Daikin in delhi. Any idea ?

Abhishek Jain (Mod)

Hi Asif,

Depends on the model, but the in general Daikin is a better brand than Samsung and electrolux. Every one has some or the other technology. Samsung has 8 pole and LG has Dual inverter. Point is one has to compare 1) Cooling 2) Power consumption and then also durability. I think Daikin is better than these two.


1 final question,
Between Daikin and Blue star , which company gave better service. After sale .

Abhishek Jain (Mod)

It varies from area to area. You will have to check with local dealers and people who use those brands.


Hi Abhishek,

I have recently purchased a 2.2 Ton split AC.What should be the KVA rating for the stabilizer for a 2.2 Ton AC?

Abhishek Jain (Mod)

Which brand and model AC did you purchase?


Its MHI SRK25CSS model Split AC of 2.2 Ton

Abhishek Jain (Mod)

It's peak power input is about 2050 watts. Which means in steady state at peak power the ampere would be about 9. Assuming startup current is 3 times more, then approx 30 Amp would needed. Which makes the VA value 30x220 = 6600. So about 6.5 kVA would be needed.


Any particular model of copper which you can suggest for the same?

Abhishek Jain (Mod)

I do not have too much research and analysis around the same. So difficult for me to name one.


I have Lloyd ac 1.5 ton before 1month.now its not working properly. What is the problem? Only fan only working. Cooling is not there. How to resolve it.

Abhishek Jain (Mod)

It could be quite possible that the outdoor unit is getting lot of direct heat from sunlight or it may be facing another outdoor unit which must be throwing a lot of hot air on it. In general if the outdoor temperature is too high and the air surrounding the outdoor unit is too hot, the compressor stops working. Does it work properly at night?


sir, as you told me that company should give a reason why pcb fails, they only tell me that there is a installation defect and
there may be a electrical spike but they are not sure as the technician will not able to find the reason

Abhishek Jain (Mod)

This is strange and a good feedback. A spike should burn something but then it does not look like that is the case.

madhu sudan acharya

People around me say that it is harmful to study under the light of LED Bulb. How far it is true? In fact, i was to buy a table lamp with LED bulb of 4 watt for my son's study. Though the matter is of little importance, considering eye health of my son, I require your guidance. Hope it will be answered. Thanks.

Abhishek Jain (Mod)

LEDs have high luminescence and unidirectional light, thus it causes strain to eyes when looked at directly. People usually use frosted deflectors to minimize this. But in case of table lamp, it will point downwards. It should not be too bad especially if you do not select one with really high wattage.


I bought Daikin JTKM50, should I use surge protector or voltage stabilizer as my home is in front of transformer so voltage fluctuation is not a problem but pcb of outdoor unit become fail one week and company doesn't find the reason as humidity is not present near my home in Delhi.
Please provide online buy link.
Can I use both voltage stabilizer and surge protector together?
The outdoor unit is not covered so is there any problem in different weather conditions as I am not able to cover it?

Abhishek Jain (Mod)

Hi Pulkit,

Daikin should provide a reason why the PCB failed. If there was a surge, then PCB should burn. If there was corrosion then that should also appear. They cannot say that it failed without any reason. As for surge protection, you can check Sollatek AC Guard (Amazon Link: http://amzn.to/2rxDSCt ).


10 * 11 feet room. Ground floor. No direct sunlight. 1 tonne will be very good. My confusion is b/w 5 star split AC and inverter ac. Companies - Daikan, carrier, Hitachi. Budget - Around 35000.

Abhishek Jain (Mod)

Hi Aditya,

1 ton should be mostly fine for your room. BEE 5 star rated non inverter ACs and BEE 3 star inverter AC are quite close in terms of electricity consumption, with just a few models of BEE 3 star rated inverter ACs being slightly better. But then there are lot of other benefits of inverter technology, so if the choice is between these two, in general it is better to go for inverter AC. However, it will be difficult to get BEE 3 star rated inverter ACs of 1 ton in a budget of 35K from the brands you have selected. LG and Voltas would be the best bet in your budget. The best models that I can think of that can fit in your budget are Daikin BEE 5 star rated non inverter series:

ATF35 (Flipkart Link: http://fkrt.it/N!g9NTuuuN )
DTF35 (Amazon Link: http://amzn.to/2skAnNT , Flipkart Link: http://fkrt.it/uTeTF!NNNN )

Or Carrier Superia (Amazon Link: http://amzn.to/2skBZqK )

FTF35 or ATF35 or DTF35. Carrier Superia would be the netx best bet.


Hi Abhishek,

How is the Mitsubishi Heavy SRK20 CSS 1.6Ton AC in cooling performance?Also can a surge protector like Belkin be able to handle 1.6 Ton AC along with stabililzer?Could you suggest the particular Belkin model for this particular AC model?

Abhishek Jain (Mod)

Hi Tarun,

Do not use a surge protector for fixed speed AC. It will not really be useful. For a fixed speed AC you can go with a voltage stabilizer with surge protection. A surge protector of 16 Amp will shut down if the current is more. And a fixed speed AC will certainly use more than 16 Amp current to start up.


Thanxs for the prompt reply,How about the perfomance of that particular AC model?

Abhishek Jain (Mod)

I think it is a fantastic AC. It has good energy efficiency. It has a long air flow and thus can cover a large area. MHI is a great brand.


Hi Abhishek,

I live in Ahmedabad where the temp go upto 47C. I am looking for a 1.5T split ac for usage upto 11 hours a day for about 8 months a year. Please suggest some good models. Also, suggest if I should go for inverter or stick to 4/5 star non-inverter ac

Abhishek Jain (Mod)

Hi Manu,

Inverter AC would be better looking at your usage. What is your budget for this AC?


My budget is upto 45K. I like Superia/Octra series from Carrier, Blue Star, LG. Please suggest any from these brands or otherwise

Abhishek Jain (Mod)

Hi Manu,

If you can get Carrier Superia or Octra series inverter AC in your budget then that would be the best as they are BEE 4 star rated inverter AC. But I doubt you will get them. These are good options in BEE 3 star rated inverter ACs in your budget:

Hitachi RSB318IAEA
Hitachi RSD318EAEA
Hitachi RSH318EAEA (Amazon Link: http://amzn.to/2oKrNrZ )
Panasonic PS18SKY
LG JS-Q18SUXD (Amazon Link: http://amzn.to/2oMG2Le )
LG JS-Q18AUXA (Amazon Link: http://amzn.to/2oMjWqB )
Blue Star 3CNHW18TAFU
Voltas 183V EY (Flipkart Link: http://fkrt.it/j34ZwTuuuN )
Voltas 183V IY (Amazon Link: http://amzn.to/2r23ghH )
Blue Star 3CNHW18NAFU

Shakeel Chohan

I few days back in installed Gree Inverter in my room. I am living on first floor with direct sunlight. I have two questions:
1) Now a days when my ac runs its starts giving weird smell, initially it wasn't giving any smell.
2) My AC does not drain water until i set the temperature below 22 C. When AC starts draining water the smell also automatically Extinguishes.
My question is whether these two behaviour of AC are normal, if not, can i sort out this issue by myself or have to consult technician.

Abhishek Jain (Mod)

The two things happening are quite linked. Usually if the AC is oversized or not running at ideal capacity (tonnage) then it will not remove humidity effectively and when it does not remove humidity effectively, molds and mildew develop and can cause bad smell. My guess is that your AC is quite big for your room.

Shakeel Chohan

Thanks for ur reply.
My room size is 13.5 x 10.5 x 10. I m living on first floor with direct sunlight facing west. I have currently installed 1.3 ton inverter.

Abhishek Jain (Mod)

That should not be too big for the room. If you are in Mumbai (or close to sea) then may be 1 ton would have been sufficient. But even then 1.3 ton should not be too big. I would suggest that you check with Gree and tell them that it is not able to remove humidity effectively.

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