Electricity Saving Tips For Homes And Offices

Choose the right sized water heater/geyser for electricity saving

By on August 25, 2015

Hindi Translation: बिजली की बचत के लिए सही आकार के वॉटर हीटर/गीजर का चुनाव

Planning to buy a new water heater/geyser and confused with the options available and sizes available? If yes then you are not alone, there are many people who face the same situation while buying a water heater. While buying a water heater one has to make sure that it not just suffices the need of the family but also does not increase electricity bills (or units consumed) significantly. People might look at the wattage of the water heater to determine the amount of electricity the water heater might use, but wattage does not have any impact on the electricity consumption of water heater. We will try to list some facts that can help you decide on the size and type of water heater.

Water Heater

What factors does electricity consumption of water heater/geyser depend on?

Electricity consumption of water heater depends on:

  • Volume of Hot Water used: This is the main driving factor of electricity consumption by water heaters. The more the hot water you use, the more the electricity it will consume.
  • Tap (Input) water temperature: Places with colder climates need lot more heating than places with warmer climates. A water heater in Kashmir will require lot more electricity than a water heater in Tamil Nadu.
  • Temperature of water used for bathing: Please note that this is different from thermostat temperature.
  • Thermostat temperature: This is by default set to about 60oC for most water heaters. Some heaters have external control to change this setting.
  • Standing Losses: Yes, water heaters do lose heat and this is calculated as standing loss. It is the heat lost through the surface of the water heater. BEE defines standing losses as the energy consumption of a filled water heater, after steady state conditions have been reached when connected to electrical supply, when no water is drawn. Much of this depends on the quality of material used for making the water heater. Branded water heaters are of better quality and thus they are preferred. BEE also rates only the branded water heaters.

How much water is required for my family?

A very straightforward guideline for the same is as mentioned below:

  • For bathing using bucket water: 15 lts/person per bath (one bucket). If more buckets of water are used, then add 15 lts/bucket.
  • For bathing using shower: 25 lts/person per bath.
  • For tub bath or extended shower bath: 35 lts/person per bath.
  • For washing cloths: 10 lts/person per day.
  • For washing utensils: 5 lts/person per meal.

(Source: http://www.teriin.org/ResUpdate/reep/ch_9.pdf)

So if there are 4 people in the household and all 4 take shower bath. Then the total hot water requirement per day of the household is 100 lts. Keep adding the water per use as per the guidelines above and you will get the water requirement of your house.

What is the ideal temperature for bathing?

Although most water heaters have a thermostat setting of 60oC, which means that, the water is heated up to 60oC but can human body handle water at 60oC? The answer is NO. Water at 60oC is too dangerous for human body and can cause first-degree burns. Human body temperature is 37oC and any temperature above it feels hot. A temperature of 46oC is quite hot but far less dangerous than water at 60oC. So even though your water heater heats the water to 60oC, you need to add extra cold water to make it bearable.

(Source: http://www.telegraph.co.uk/health/3318578/So-Mr-Prescott-how-hot-should-my-bath-be.html)

So what is the ideal Electricity Units that are required by your family?

Heating of water is a classic thermodynamics problem and has a straight forward formula:

Heat required = M (Mass of water) x Cp (Specific heat of water) x delta T (Difference in starting temperature and desired temperature).

A simplified solution to calculate electricity units is:

                                    Ideal Units for heating = Volume of Water x Temperature Difference x 0.0012

So if your family’s water requirement is 100 lts of hot water per day and you prefer to use water at 40oC and your tap water temperature is 20oC. Then the ideal units for your water heating requirement is:

                                    100 x (40-20) x 0.0012 = 2.4 units per day.

Will all water heaters consume ideal units of electricity?

No. The amount we calculated above is the ideal units and not the actual units. The actual units depend on the size of water heater, standing losses and the way you use it. The bigger the size of a water heater higher are the standing losses, because more is the surface area. Typical 100 lts water heaters have standing losses of more than 1 unit/day, 70 lts water heater is close to 0.9 units/day, and it decreases as the size decreases.

If you leave the water heater on throughout the day then you certainly loose the full standing loss units in a day. The way to minimize it is by heating the appropriate amount of water that is required which can be done by switching the water heater on before use and switch it off after use. This way the standing losses will be minimized to the period when water heater is used. Also do not waste any extra hot water because that is waste of electricity.

So does it mean that you should buy smallest volume water heater?

Depends. If the water heater is too small then the amount of hot water (even if it is at 60oC) will not suffice the need of single person (even after adding cold water). You will have to wait for longer for the water heater to heat the desired amount of water or keep the output flow of water from the heater low.

So what is the ideal size?

Ideal size of water heater should be close to the volume of hot water required at one go. If people take bath one by one and use 25 lts of water, then a 25 lts or a 15 lts of water heater will make sure that the water is optimum hot when one goes to take bath (at places where tap water temperature is not too low). If the tap water temperature is too low (especially in cold places) only a 25 lts capacity hot water will work if 25 lts of water is required for a bath. If water heater is connected to 2 bathrooms then ideal size is 25 + 25 = 50 lts, because 50 lts of water can be used simultaneously. This does not mean that 6 lts water heater will not suffice; it’s just that it will take more time to heat the same amount of water or you might have to bear with cold water at the end of your bath. Ideal sizes are those that generate enough heat that are good for maximum instantaneous use.

How does the wattage of water heater effect?

Wattage of water heater makes the water heat faster or slower. If you buy an instant water heater of 4.5 kW the water will heat faster than a water heater of 2 kW. At times a 4.5 kW instant water heater can also heat the water required for bathing and can save electricity (by stopping wastage of extra hot water). The only downside of 4.5 kW water heater is that it increases the electricity load of your house which means that you connected load will have to be increased which may increase the fixed charge component of your electricity bill.Infographic11


  • Sana

    Sir, I posted a query on 18th of Aug and I did not receive any reply. Can you please revert back.

    Thanks and regards
    Sana

    • Bijli Bachao Team

      Hi Sana,

      If people in your house prefer bucket bath then a 10 lts water heater should be good enough. However people prefer taking a shower then 15 lts one would be good. You can check the most efficient models available in the market on this link: https://www.bijlibachao.com/top-ten-appliances/best-water-heaters-geysers-brand-in-india-by-standing-loss-and-size.html

  • Raufahamad Pathan

    Hi Bijli Bachao Team,

    I am from Pune, I am planning to install instant Geyser but for low water pressure. Water inlet to geyser will be from my loft water tank, which will have height of 1-1.5 feet.
    In my 2 bathrooms, i am aleardy having AO smith 15ltr and Bajaj 1ltr geyser installed. I am looking for 3rd geyser for my third bathroom.
    On this point, which branded geyser i should go for? please mentioned with model number as well.
    Can you please provide your valuable inputs on this to resolve this difficult situation.

    Thanks and Regards,
    Rauf

    • Bijli Bachao Team

      Hi Rauf,

      Apologies, but currently we do not have data to figure out models that can work in low water pressure conditions.

  • Sana

    We live in a high rise building on 10th floor of 28 floor building and water is bore water. Please suggest a good water heater for a family of 4 people.

  • Krishna

    Hi, We, a family of 3 people, live in chennai with occasional guests. We are looking for geyser which will be connected to 2 bathrooms. It is mostly bucket bath and occasionally shower. While 2 of us mostly go for cold water bath, one of us compulsorily needs hot water bath. All of us bath twice a day. Which is the most suitable geyser for us. Sorry I missed out to add that we stay on 9th floor of a high rise building of about 30 floors and water pressure is too high for shower bath

  • Aayush

    Sir tell me which water geyser is used in home for save electricity.
    For kitchen and bathroom which geyser size is right

    • Bijli Bachao Team

      I would suggest you to go for 1 or 3 lts instant water heater for kitchen and 10/15 lts models for bathroom.

  • Debashis Mitra

    Hi, I am planning to put one geyser for one of my bathrooms. We are 5 member in the house. There are 4 adults and 1 kid. I already have 1 solar heater in my one bathroom, and I want to use geyser in my another bathroom. We generally use mix of bucket/ shower, but shower option is more. Please suggest should it be instant or storage one or what would be the capacity. On an average there would 3 adult and 1 kid would be using the same on an average.

    • Bijli Bachao Team

      A 15 lts water heater would be good for you. You can look at these:

      HAVELLS QUATRO 15
      AO SMITH HSE-VAS-015
      MORPHY RICHARDS Lavo Digi15
      MORPHY RICHARDS Lavo EM15
      Ferroli Caldo.15V
      HAVELLS QUATRO DIGITAL 15

  • Baira Raghavan

    Hi there:

    I am planning to install water heater in 3 bathrooms. There are 2 adults and 4 kids. Usually, it is bucket bath. Usually, two bathrooms are used at a time. What do you suggest? Instant or storage. If instant, how many litres and if storage, how many litres. Also, would you please let me know the advantage of instant over storage or vice versa. Also please let me know what brand to buy.
    Your suggestion would really help a confused soul.

    Thanks, Baira

    • Bijli Bachao Team

      If you do not live in a place with extreme cold climate then a 6-10 lts storage water heater would do. Or if you want to go for instant then you need to go for a 3 lts one with 3-4 kW heating element.

      Benefits of Instant:

      1) It saves electricity (consumes less units).
      2) It saves space.
      3) It heats fast as the heating element is of higher kW.

      Drawbacks of Instant
      1) Higher kW means higher load on the electricity connection. Which means you will need better wiring as well as higher connected load from the electricity distribution company. This can increase the fixed charges component of electricity bill (however it will still be less than energy charges).

      2) It cannot work with showers as the water required for shower bath is lot more.

      Top brands: Havells, AO Smith, Racold, Bajaj, Ferolli, Venus. You can buy an instant water heater from any of these brands. Just make sure that you look at the wattage of heating element. It should be 3 to 4 kW.

  • Dhawal

    Hello,
    I would like to install 3 shower panels and 3 different bathrooms. Each bathroom will be used by 2 to 3 persons. What size and type of geyser is required? I always want always on geyser which gives continuous hot water to wash basin, shower, taps etc 24X7 but I guess electric consumption will be too high. Please advice.

    Thanks in advance.

    • Bijli Bachao Team

      Hi Dhawal,

      If you keep the geyser on for 24×7 then certainly it will increase the electricity consumption of the geyser. The biggest loss would be the standing loss of the geyser. Standing loss will be more if you go for a big sized geyser. I would suggest you to go for a BEE 5 star rated 15 lts geyser as it would suffice your bathing needs as well as will have lesser standing loss as compared to bigger geysers. You can check the list of top ten water heaters (by size) on this link: https://www.bijlibachao.com/top-ten-appliances/best-water-heaters-geysers-brand-in-india-by-standing-loss-and-size.html

    • Dhawal

      Hello Bijli Bachao Team,

      Thanks for your reply. So this is the model you are suggesting with lowest standing loss?

      http://www.snapdeal.com/product/havells-15-quatro-digital-geyser/483036884

      Will this be able to work with shower panel as I saw on AO smith website and they said 50 Liters Geyser is needed for shower panel as you can see on following link

      http://www.aosmithindia.com/How_select_Water_Heater.html#q2

      Please advice as this wont be normal shower but it will be shower panel with one rain shower and 4 body jets and atleast 2 to 3 people should be able to take a bath one after another.

      Thanks in advance.

    • Bijli Bachao Team

      Hi Dhawal,

      If 2-3 people are going to use it immediately one after another then you can go with a 50 lts water heater. A 15 lts water heater will take 20-25 mins to heat up again. Also if you have a panel then you can go with 50 lts.

      Ideally electricity consumption depends on amount of hot water you use. If you use more then electricity consumption will be more. Also if you go for bigger sized water heater, then the standing losses are also more. That is why we suggest people to go for 15 lts water heater for regular shower. You can look at these:

      Ferroli Caldo.50V
      MORPHY RICHARDS Premio Digi50
      MORPHY RICHARDS Fervo Digi50
      MORPHY RICHARDS Lavo EM50
      Ferroli Caldo.50H

  • Jeetendra

    I want to install water heater in my manufacturing unit where I need 30-40 ltrs of water at 50 deg Centigrade after every 20 minutes. Please suggest me suitable options. Thanks ..

    • Jeetendra

      Also please let me know the no. of electric units it will consume per cycle. Thanks…

    • Bijli Bachao Team

      Hello Mr Jeetendra,

      Assuming that incoming water is at 20 degrees, you would need 40 x (50-20) x 0.0012 = 1.44 units or kWh of electricity to heat water to 50 degrees. If you need it every 20 mins then you need a heater with heating element of 1.44 x 3 = 4.32 kW. So you need heating element of roughly 4-5 kW.

      However as you need it for commercial use and you need frequent heating, I would suggest you to go for heat pump based water heater of 75-100 lts capacity. It would be 3-4 times more energy efficient than regular water heater. So instead of 1.44 units per cycle it would consume 1/3 or 1/4 of it. Heat Pump is just like an AC. You would have seen that ACs throw heat from the outdoor unit. Heat Pump based water heaters use that heat to heat water. So it can serve dual purpose of AC as well as water heating, and on top of it, it will be highly energy efficient. You can look at these cataloges:

      http://www.aosmithindia.com/New_Commercial_Products/AWH.pdf

      http://www.racold.com/pdf/Heatpump.pdf

      http://www.venushomeappliances.com/commercial-hp.html

  • Shebu

    Hi Team,

    I live in Coimbatore and we are 4 adults family, please suggest a water heater with capacity used for shower/bucket bath only. Can I connect a single water heater to 2/3 bathrooms, if so suggest the water heater capacity I need to look for..

    • Bijli Bachao Team

      You may look at any of these:

      HAVELLS QUATRO 15
      AO SMITH HSE-VAS-015
      MORPHY RICHARDS Lavo Digi15
      MORPHY RICHARDS Lavo EM15
      Ferroli Caldo.15V
      HAVELLS QUATRO DIGITAL 15

      If you want to connect multiple bathrooms, then you will have to go for bigger 50 lts water heater. But I would not recommend that from an energy savings perspective.

  • Vivek

    What is the smallest horizontally wall-mounted gyser sufficient for 1 person?

    • Bijli Bachao Team

      Hi Vivek,

      What is the width/height that you want to fit your geyser in?

  • sarathy

    We have 5 members in our family . Out of 5 ,three are adults . can u suggest a water heater for us ??? we live in Bangalore , karnataka. I plan to buy 2 water heaters for 2 bathrooms. I expect a energy efficient / very reliable brand.

    • Bijli Bachao Team

      Hello Sarathy,

      A 15 lts water heater would be good for you to have shower and save electricity as well. You can look at these:

      HAVELLS QUATRO 15
      AO SMITH HSE-VAS-015
      MORPHY RICHARDS Lavo Digi15
      MORPHY RICHARDS Lavo EM15
      Ferroli Caldo.15V
      HAVELLS QUATRO DIGITAL 15

      If you use bucket for bathing then you can look at these:

      HAVELLS QUATRO 10
      MORPHY RICHARDS Lavo EM10
      Ferroli Caldo.10V
      MORPHY RICHARDS Salvo 10L
      Bajaj Shakti GPV 10 GL

  • Bharath

    We have four members in our family . All four are adults . can u suggest a water heater for us ??? we live in mysuru , karnataka.

    • Bijli Bachao Team

      If you mostly prefer bucket bath then a 10 lts water heater will be more than enough. In that case you can look at these:

      HAVELLS QUATRO 10
      MORPHY RICHARDS Lavo EM10
      Ferroli Caldo.10V
      MORPHY RICHARDS Salvo 10L
      Bajaj Shakti GPV 10 GL

      But if you prefer shower bath then you would need 15 lts and in that case you can look at these:

      HAVELLS QUATRO 15
      AO SMITH HSE-VAS-015
      MORPHY RICHARDS Lavo Digi15
      MORPHY RICHARDS Lavo EM15
      Ferroli Caldo.15V
      HAVELLS QUATRO DIGITAL 15

  • Prashant

    We are three members in family. Two adults and one child living in Pune. Which Water Heater will be suitable for us?

    • Bijli Bachao Team

      Hi Prashant,

      A 10 lts water heater should be good enough for your family. You can look at these:

      Morphy Richards Salvo 10L
      Havells OPAL 10
      Usha Aquagenie 10L
      Bajaj PX 10 GLR
      Havells BUENO 10
      Bajaj Majesty 10 GPU
      AO Smith HSE-SBS-010

  • Anand

    Hi Team, I leave in Pune with my 4 family members. I am planning to buy Jaquar 25 Lit storage water heater for one bathroom.
    We selected Jaquar becasue, its giving Warranty 7 Years on Tank, 4 Years on Heating Element, 2 Years on Other Parts

    http://jaquar.com/products/elena-horizontal-volume-l-15

    Please suggest, if our choise is energy efficient too.

    • Bijli Bachao Team

      Hi Anand,

      This model is not there on BEE’s list and it looks like it is not rated by BEE. So cannot comment if it is energy efficient too.

  • sandeep

    Hi, I would like to install solar water heater but i found out that when the house was being constructed , plumbing was not done for solar water heaters. can we do plumbing now without any extreme modifications? how hard or easy it is? the house is G+1 wit two bathrooms in both the floors. thanks

  • vijay

    Dear Sir,
    I intend buying water Geyser for a family of four adults in Chennai -to be used only for bathing .What should be the ideal size .Which company’s geyser should be bought( having minimum standing loss) Can you suggest three companies name

    • Bijli Bachao Team

      You can go for 15 lts water heater. You can look at these:

      Havells QUATRO 15
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts

  • S.Viswanathan

    I would like to buy a instant water heater for my family, in our house only my wife uses hot water, and
    that too not more than one bucket. Can you suggest best instant water heater, whether it should be 1 lt.
    or 3 lt. capacity, and the wattage required.

    • Bijli Bachao Team

      Hello Mr Viswanathan,

      A 3 lts capacity water heater would be better for you. You can look at these:

      A O Smith EWS 3 L
      Havells Opal 3 L
      or Racold Pronto 3L.

  • Pradeep

    Mine is a family of six living in a place where the average winter temperature is 5 degree. Considering 2 buckets (hot + cold) per person for a bath, can you suggest a couple of models along with the required capacity. I prefer storage type.

    • Bijli Bachao Team

      A bucket of water is about 15 lts. A bucket full of water at 75 degrees when mixed with bucket full of water at 5 degrees would get you 2 buckets full of water at 40 degrees. Which will be more than enough for your need. So you should go for a 15 lts water heater. You can look at these models:

      Havells QUATRO 15
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts

    • Pradeep

      Thanks a lot again.

  • Pradeep

    Is it possible to use solar water heater in early morning where there is no sunlight ?

    • Bijli Bachao Team

      Hi Pradeep,

      As long as the atmosphere is hot outside the water heater can heat water. Also the water that got heated previous day will stay hot in the water heater because the water heater will have good insulation.

    • Pradeep

      Thanks a lot Bijli bachao team for the quick reply.

  • monika

    1 KW input then what is output KW of Geysers.

    • Bijli Bachao Team

      For electric geysers 1 KW input will give 1 kW output. It’s only with geysers of heat pump type that 1 kW input can give 3-4 kW output.

  • shashi

    Sir,
    I had downloaded a doc from ur website which had details about Geyser,
    Ranking Brand Star Rating Grand Total
    5 4 3 2 1
    1 RACOLD 30 20 1 8 0 59
    2 V-GUARD 21 9 4 2 0 36
    3 AO SMITH 21 8 0 0 0 29
    4 VES-STAR 20 0 0 0 0 20
    5 CROMPTON GREAVES 18 7 13 1 0 39
    6 HAVELLS 18 1 1 0 0 20

    Based on this I had opted for V GUARD ,but in most of ur reply either u suggest Racold or Havells ,is their any particular reason for this. I stay in Bengaluru, we are family of 3 and I had opted for 10 liter Geyser, we had connected solar heated water to Geyser ,

    • Abhishek Jain

      Hi Shashi,

      The list of top brands is based on number of energy efficient models listed with BEE (which is based on standing losses of various water heaters). When we suggest models we look at technology and features in various models and suggest accordingly. Models from Racold, Havells and AO Smith have nicer features that can save electricity, provide protection and are durable as well. However that does not mean VGuard is bad, but if we compare models on features, models from these brands come out better.

  • Rajesh

    Pls suggest between 10L racold eterno 2 vertical versus Bajaj majesty GPU 10L heater…which is better to purchase

    • Abhishek Jain

      Racold Eterno 2 is giving more warranty. So I would prefer that.

    • DR DEVA PRASAD SAHU

      I live at Bhubaneswar having a family of 3 members. We are used to bucket water bathing. Please suggest me whether am instant geyser (1 lt or 3 lt) will serve our purpose or a storage type will be better ? If storage type, then what is the ideal capacity ?? 10 L or 15 L ??? If I purchase from JAQUAR (HSE-SCJ 10 L or 15 L), is it OK ???? Or any other better manufacturers ? Kindly guide me.

    • Abhishek Jain

      Hello Mr Sahu,

      Bubaneshwar is not very cold in winters so even 3 lts instant water heater would work if used for bucket bath. If you go for storage then 10L one would be more than enough. Bajaj, Racold, AO Smith, Havells, Venus are some good water heater brands. If you are looking for instant water heaters then you can look in one of them. If you are looking for 10 lts water heater then you can look at these:

      Morphy Richards Salvo 10L
      Havells OPAL 10
      Usha Aquagenie 10L
      Bajaj PX 10 GLR
      Havells BUENO 10
      Bajaj Majesty 10 GPU
      AO Smith HSE-SBS-010

  • Rajesh

    Sir, we r a 6-member family in Nashik. All r using bucket bath. Planning to buy Racold Eterno-2 storage water heater.
    Please suggest proper size (10L or 15 L) for lesser electricity consumption and alternate better models.

    • Abhishek Jain

      Hello Mr Rajesh,

      You can go for 10lts Racold Eterno-2 water heater.

    • Rajesh

      Thanx for ur suggestions Sir..

  • Abhijeet

    Sir. I want to buy a Geyser for my Family in which there are 5 members. which is best suitable and which is energy efficient GEYSER?. which is best 10 Liters 15 liters or 25 liters. Please Guide me. And Prefer best Geyser.

    • Abhishek Jain

      Hello Mr Abhijeet,

      Which city are you in? Also do family members prefer bucket bath or shower bath? Is it only for one bathroom?

    • Abhijeet

      sir, my village is Naldurg which is near to solapur city. family member prefer both as shower and bucket bath. and there are two bathroom. as one is use for all and one is attached to the master bed-room.

    • Abhishek Jain

      Hi Abhijeet,
      You should go for 15L water heater for both the bathroom.
      You can look at these 15L water heaters.
      Havells QUATRO 15
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts

  • joseph

    Is 10 litre water heater good for a shower for one person pls?

    • Abhishek Jain

      Depends on the city. If it is not too cold then it will surely work. If you live in a cold city and take longish showers then it may not.

  • Bhargav

    We are a family of 2 adults and 1 child. We stay at Bhavnagar, gujarat, India. Which size geyser suits us most ? We get municipality water. We want to use it for shower or bucket bath either way. Thanks.

    • Abhishek Jain

      You should go for 15 lts water heater. You can look at these:

      Havells QUATRO 15 (Havells Quatro Digital has a remote control as well which can be quite useful)
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts water heater.

    • Bhargav

      Thanks abhishek.. I ordered racold cdr 15 ltr ivory.

    • Deshpande

      Abhiji in 1ltr 4.5 kq model is available will it HV more pier consumption?or for bucket bath 1ltr 3kw will suffice in pune for countinous stream bucket bath?

    • Abhishek Jain

      Hello Mr Deshpande,

      power consumption depends on the volume of hot water you use. It does not depend on KW of the geyser. KW just determines the speed at which the water becomes hot. A 4.5 kW instant water heater can provide more continuous hot water as compared to 3 kW water heater. However if you put a 4.5 kW water heater, make sure that you have enough connected load on your electricity connection to handle the same.

  • Anuj Mathur

    Hi Abhishek,

    Thanks for the useful information. I do have a query with regard to the optimum capacity of the geyser I should buy. My house has two main bathrooms and a guest bathroom. Unfortunately, the guest bathroom only has a horizontal space of 13? to install a geyser. Even the vertical space is at premium and a bulky geyser would not fit there.

    I bought a havells 15 litre geyser and tried to hang it at the place of installation (without actually installing it yet). Though it seems to fit snugly there, I do feel that there wouldn’t be any clearance or margin at all, neither on both sides of the geyser, nor from the top. An experienced electrical did also advise the same thing to me.

    If I buy the 10 litre version, it should fit appropriately there. But I am concerned whether it would be sufficient. Although the bathroom would only be used occasionally, it?s likely that the shower will be used rather than bucket. Considering the cold climate in Delhi, would a 10 litre geyser be sufficient for a single person?s shower bath. Or else, do you think that it would be appropriate to install the 15 litre version. Energy consumption would not be the deal breaker here.

    An early response would be much appreciated.

    • Abhishek Jain

      Hello Mr Mathur,

      10 lts water heater can provide a short shower bath not a longish one which people mostly like while using shower. If there is another bathroom close to this one, you may consider going for a bigger water heater for combined two bathrooms.

  • Jebin

    Kindly request your suggestion. I am trying to decide between a 3L and a 1L instant water geyser (both rated 3KW) for shower bath purpose. Per the calculations that you have explained below, for a 3L and temp difference of 30 C – time required is 6.3 secs; and for a 1L – same scenario – time required is 2.1 secs. If this is true, isn’t 1L model better?
    Based out of Bangalore and the water source is both borewell water and Kaveri water. Which brand is better – AO Smith, Racold or V-Guard or any others?

    • Abhishek Jain

      Hi Jebin,

      As per the calculation mentioned below it will take 2 mins to heat 3 lts and 42 seconds to heat 1 ltr by 30 degrees. The rate of heating remains the same at 3 KW. Better or not will depend on the rate at which you use the hot water. A 3 KW heating element can heat 1 lts in 42 seconds. If you are drawing 1 lts water in 42 seconds then you will get continuous hot water be it 1 ltr instant heater or 3 lts instant heater. Because the moment you draw water from the tank, cold water will fill it in.

      In general I would not suggest instant water heater for shower bath purpose specially when you live in B’lore where temperature is generally low. For shower bath in B’lore 15 lts water heater would be better.

  • mudu

    I need instant water electric heater or geyser 6 or below liters because I have already instant water electric geyser but electricity billing is too high every month. Please advice good instant water electric heater or geyser for low electricity bill. We have take bucket bath every day. I live in Mumbai.

    • Abhishek Jain

      Hi Mudu,

      Water heater of 6 lts capacity is not classified as instant. Instants are 3 and 1 lts models. If you are looking for 6 lts you can look at these:

      Havells BUENO 6
      Havells QUATRO 6
      Bajaj Majesty 6GPU
      A O Smith HSE-SBS-006 or HSE-SAS-006

      If you are looking for instant, then you can look at Racold, A O Smith, Havells, Bajaj or Venus instant water heaters.

  • Ashfak

    Ashfak from bellary Karnataka, we r 4 family members we using bucket bath which is better 3litr or 6litres plz reply.

    • Abhishek Jain

      I would say 10 lts is better, but if the choice is between 6 and 3 then I would choose 6 at least.

  • husein

    We want instant water geyser not storage geyser.below 6 liters. We take bucket bath.pls suggest good power saver or good star rating geyser or heater i live in Mumbai.

    • Abhishek Jain

      Hi Husein,

      You can go for AO Smith, Racold, Havells or Venus instant water heaters.

  • husein

    I need instant water heater (which can heat at least 10 liters of water) with low power consumption?

    Please advice? I live in Mumbai.

    • Abhishek Jain

      You can look at these models:

      I guess Indore is quite cold in winters. 6 lts is good for places like Mumbai that are not very cold in winters. And that too for bucket bath. So if it will be used just for bucket bath and temperature is quite low in winters then a 10 lts model will be sufficient. If it is for shower bath then you will have to go for 15 lts water heater. You can look at these 10 lts water heater models:

      Morphy Richards Salvo 10L
      Havells OPAL 10
      Usha Aquagenie 10L
      Bajaj PX 10 GLR
      Havells BUENO 10
      Bajaj Majesty 10 GPU
      AO Smith HSE-SBS-010

  • kumar

    Hi, Planning to install water heater for attached bathroom for single(sometimes two persons) usage. WATER PRESSURE is too LOW since its a single floor house and over head tank is just above the roof. Please suggest which type of geyser I can go with

    • Abhishek Jain

      Hi Kumar,

      Low pressure is not a problem for water heaters. High pressure is. However a question for you, will it be used for bucket bath or shower bath?

    • kumar

      Thanks a lot abhi for ur reply. my concern was, since the water pressure is low, it takes time to fill up, which might cause dry heating.(during filling). Coming back to your question, usually bucket, v.rarely shower. Again low water pressure might be a drawback for using shower. It would be great if you can suggest best type n capacity for the above requirement

    • Abhishek Jain

      Hi Kumar,

      For bucket bath 10lts water heater should be good enough. You can look at these models:

      10 lts models:
      Morphy Richards Salvo 10L
      Havells OPAL 10
      Usha Aquagenie 10L
      Bajaj PX 10 GLR
      Havells BUENO 10
      Bajaj Majesty 10 GPU
      AO Smith HSE-SBS-010

    • kumar

      Thanks a lot abhi

  • Mayur Ganeriwal

    thanks u abhishek for suggest me..

  • Aneesh Thomas

    Hi Abhishek,

    Thanks for sharing ur knowledge.. I really appreciate u for helping the unknown.

    I am Looking for a Water Heater For a Small House. I Would like to Knw, How fast a 6ltr 3000KW 5 star rated geyser can Heat Up the Water to Its Max Temp? If The Climate Temp Is around 20 Degree.

    Thanks
    Aneesh

    • Abhishek Jain

      Hi Aneesh,

      To heat 6 lts water to 60 degrees the energy required would be 6 x (60-20) x 0.0012 = 0.288 kwh or units. So time taken would be (0.288/3)x60 = ~6 mins.

  • Mayur

    hello abhishek..,
    u say dat all of them have protective inner coating technology dat prevent
    water heater from corrosion..
    can u tell me which brand is good and better .. i m confuse which product i
    buy..
    ao smith comes in blue diomand glass lines technology and raccold comes in
    polytene coating technology ..
    can u suggest me which is better .. racold interno dg 25 ltr.. or ao smith
    hse -ses , or venus splash digital..
    wat is means of 1kw/2kw/3kw..
    which temperature i set to warm water dats its works for long tym and how
    many tym taken to warm the water…
    regards…

    • Abhishek Jain

      Hi Mayur,

      Polymer based coating is better than Enamel based coating for hard water protection. You can go for Racold model.

      1 Kw/2 Kw/3 Kw means the rate at which water is heated in the water heater. 3 kW will heat fastest and 1 KW slowest.

      For 25 lts, a 1 KW heating element would take about 1 hrs to heat water, 2 KW would take 30 mins and 3 KW 20 mins.

  • Mayur Ganeriwal

    I m mayur from pratapgarh u.p .. i want to buy 25 Ltr water geyser.. which is good for me.. i select three model ao smith , racold interno dg 25 ltr , venus digital splash .. here in pratapgarh water is hard…
    Is remote control water geyser is good or manual ..

    • Abhishek Jain

      Hello Mayur,

      It is better if the geyser has a remote control. That gives an ease to switch on/off the water heater or change the temperature settings. To reduce electricity consumption it is better that you keep the temperature of the water heater at a lower setting. The three brands that you have chosen, all of them have protective inner coating to prevent the water heater from corrosion. An enamel coated glass lined tank is good for hard water. You can choose anyone of them.

  • Guru

    Thanks Abhishek,

    What the option for hardwater in 6

  • Guru

    Hi Abhishek,

    We are in Pune (Wagholi) were we have Bore well and water tanker which supply water (both areHard water) i need 2 no 10L-15 L 5 star rated which can handle the hard water.
    Regards
    Guru

    • Abhishek Jain

      You can look at these:

      15 lts models:

      Havells QUATRO 15
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts water heater.

      10 lts models:
      Havells QUATRO 10
      Havells OPAL 10
      Usha Aquagenie 10L
      Bajaj Majesty 10 GPU

  • Narayanan

    I am from chennai I have 10 lts water heater. I think its more current consumption. I want to change to solar water heater it is good or not. pls suggest.

    • Abhishek Jain

      Hello Mr Narayanan,

      Solar water heater is an excellent option. However they are available in large sizes like 100 lts+. You can read more about them on this link: https://www.bijlibachao.com/solar/solar-water-heater-system-how-can-it-save-energy-and-its-prices-in-india.html

  • Kunal

    I like to have longish showers 10-20 minutes and was thinking of getting a tankless geyser. Would the geyser give hour water for the entire duration?

    • Abhishek Jain

      It will be difficult for a tankless geyser to give continuous hot water for 10-20 mins.

  • mansi upadhyay

    Hi,plz tel me which one is best,tank or tankless geysers????

    • Abhishek Jain

      I would say that it will be best if you can go for the smallest tank geyser (6 lts/10 lts/15 lts) that can suffice your needs.

  • Sanjiv

    Hi,
    I am from Mumbai. We are a family of 6 and most of them have bucket bath. We had problems with our 20-year old “Mini Spherehot” instant water heater(in the past, had been repaired a few times for coil burnout, etc) and now that it’s out of order, would like to replace it with a new geyser. Though the domestic water supply pressure is moderate, it arbitrarily falls down to very low levels. We usually fill up about less than half bucket with hot water and then fill the remaining with cold water. Please recommend a suitable water heater(small).

    • Abhishek Jain

      I would suggest that you go for 6 lts water heater. You can look at these:

      Havells BUENO 6
      Havells QUATRO 6
      Bajaj Majesty 6GPU
      A O Smith HSE-SBS-006 or HSE-SAS-006

  • Anand

    Hi Abhishek,

    I am Pune, Maharashtra. Temperature in winters can go below 10 while in summers it might cross 40. I have a family of 4. There are 3 bathrooms in the house, two of which are connected to single water geyser connection. One bathroom is separate.

    For the separate one, I am planning to buy a 3 ltr instant geyser and I will look for options you suggested in other threads.

    My question is about the other two bathrooms with single geyser. One of the two bathrooms would be used daily while the second bathroom would be used rarely (only when guests come). Do you think an instant geyser would be okay for such an arrangement? If no, then can you suggest an adequate size of storage geyser? both of us using the bathroom daily would mostly have bucket bath. Once in a week would be shower bath.

    Plus, I also have a constraint of height of geyser as the space provided would incorporate approx. 300 mm height of the geyser.

    Please guide.

    • Abhishek Jain

      Hi Anand,

      Sizing of water heater should be done based on instantaneous requirement of hot water. If at any given time only one of the bathroom will be used then even a common instant geyser would work. If both will be used together then you would need about 25 lts water heater as instant water heater will not be able to give sufficient hot water for two people.

    • Anand

      Thanks for the reply Abhishek.

      Since one bathroom would be used rarely, I assume there is no point in heating 25 ltrs of water everytime. (thats what I gathered from other posts in your blog.)

      Now about instant geyser, I have two points:
      1. Since we take shower bath once a week, would the instant geyser be very inconvinient? Even with a higher capacity heating element?
      2. Some of my friends in the society experience higher energy bills, which they feel is because of instant geyser. But your blog says its not the case. Maybe their bills are higher because of some other reasons? (avg bill of 1200 per month without washing machine, oven etc.)

      Based on your inputs I will decide whether to go for an instant one or a 15 ltrs one.

      Would really appreciate your reply.

    • Abhishek Jain

      Hi Anand,

      The amount of hot water that you can get from instant water heater will remain the same be it for bucket bath or for shower bath. If you use instant water heater for shower, it will have to be a quick shower rather than a relaxed shower bath that one tends to have while using shower. It will not be inconvenient but will be short. Or it may get longer if you do not use shower at full force and higher capacity heating element.

      Also instant water heaters cannot increase electricity bills unless you leave it on for long and/or leave the tap on.

  • Daniyyel

    Hi Abhishek,

    I just bought the Racold Eterno DG 25L. It is a very slick geyser with tonnes of options – uniquely being able to set kW usage between 1/2/3. I needed some advice on what setting would be ideal for electricity savings.

    Assume the following to be true – initial water temperature in tank before heating is 20C, desired water temperature is set to 50C, and geyser will be switched on and off before bath. Keep in mind time needed to heat up isn’t an issue as far as inconvenience goes as it has an auto-start timer and I am the only user.
    a) 1kW (4 mins/deg) – geyser runs for 2 hours at 1kW to raise the temperature 30deg from 20C to 50C
    b) 2kW (2 mins/deg) – geyser runs for 1 hour at 2kW for the same scenario
    c) 3kW (1.5 mins/deg) – geyser runs for 45 minutes for the same scenario
    *The mins/deg numbers are from the manual and on basic observation (by keeping an eye on the LED display showing actual water temperature and noting it against a watch) I have noticed them to be fairly accurate.

    My question is assuming the above stated scenario, in terms of pure electricity savings, which is best? Run it at the lowest kW but for the longest duration, highest kW for the shortest time, or the middle ground.

    I hope this poses as interesting a mathematical question to you from a fellow energy geek!

    Your insight on this case and in general (that is varying start/stop temperatures, that is higher/lower differentials, etc) would be appreciated so that I may best make use of my new and very feature packed geyser (that is temperature setting, kW setting).

    Cheers,
    Daniyyel

    • Abhishek Jain

      Hi Daniyyel,

      Energy (Electricity) consumption will almost be the same in all the three cases because the volume of water being heated will be the same. There will be some heat loss from the surface but that will be insignificant in comparison to total energy used for heating. Even for that insignificant heat loss, the one that heats fastest will have lowest heat loss. So a 3 kW setting would be the best. You save energy as long as you do not waste hot water or leave hot water in the water heater.

    • Daniyyel

      That’s rather strange then for them to label their 1kW heating option as “Eco” mode.

      I’m afraid I may have made a mistake in purchasing this one as I was under the impression given that this was the only geyser that had the option to tune the power all the way down to 1kW, it would offer the best electricity savings.

      Just for my information, would say something like the new Havells 10L/2.5kW 5 star rated instant geyser have been a better choice? Would that sort of a “hybrid” (I say hybrid because of the comparatively larger tank size) work in Kolkata? Mean average lows in the coldest months are barrel below 15C. In the last few days of use I have observed initial water temperature in the tank to hover in the mid 20s.

      Now that I’m stuck with this one what do you suggest is my best course of action to achieve maximum savings? Run it on 3kW at a temperature of 50C and switch off before showering? Could you approximate (using the values I gave you) what kind of usage (in units) per day, assuming it runs once a day, I am looking at with this geyser?

    • Abhishek Jain

      Hi Daniyyel,

      The heating elements of water heater are almost 98-99% efficient, i.e. whatever energy they pull from source is almost completely used up for heating the water. So if you have a 10 lts water heater then to increase the temperature by 20 degrees would use: (10 x 4.2 x 20)/3600 = 0.24 KWH (or unit of electricity). A 3 kW unit will give this much energy in 0.24/3 = 0.08 hrs or about 5 mins. A 2 kW unit will give this much energy in 0.24/2 = 0.12 hrs or about 7-8 mins. A 1 kW unit will give this much energy in 0.24 hr or about 14-15 mins. A BEE 5 star rated 10 lts water heater would have standing loss of about 0.42 kWH (or units)/24 hrs or 0.0175 unit in an hour. So if you heat water with a 1 kW heating element and use it within an hour then on top of 0.24 units you may additionally use up 0.0175 units of electricity. If you heat using a 3 kW heating element then it will get heated up in 5 mins and if you use the water in another 10 mins then you hardly waste any electricity.

      So the rating of heating element is just to speed up or down the heating. The energy consumption will increase if you increase the volume of water to be heated or if you leave hot water in geyser (loss due to standing losses).

  • Shivraj

    Pls advise me for the selection of suitable Water Heaters/Geysers foe the use of family having 3 members only.
    Our average consumption of water as 15 Lit/person.

    • Abhishek Jain

      Which city are you in?

  • Sidharth

    Confused which type & size geyser to buy. We are a family of 4 assisted by two helpers. This geyser is for Kitchen & water will be used for utensil cleaning, mopping & water for two assistants to take bath. May be 1-2 bucket for gaurd & Driver. Please suggest which is the best buy. Thanks in advance

    • Abhishek Jain

      Which city are you in?

    • Sidharth

      I am in New Delhi

    • Abhishek Jain

      For your usage I think a 15 lts water heater should be good enough. You can look at these models:

      Havells QUATRO 15
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts water heater.

  • sharad

    We had 4 members family. Only I use showers. i need a water geyser for bathroom. Which size i should go for ?

    10L or 15L ?

    • Abhishek Jain

      You can go for 10 lts model.

    • sharad

      Does 10L will provide continuous hot water supply even if initial 10L got used ? if yes then how much Ltrs hot water i will get continous ?

    • Abhishek Jain

      A water heater typically heats water to a peak of 60 degrees (unless you adjust the thermostat). Which means if the incoming water temperature is 25 degrees, then 10 lts water will use up 10 x 4.2 x (60-25) = 1470 kJ of energy. Typically human beings can handle only up to 40 degrees hot water. So the amount of water that can be adjusted to 40 degrees with that about of heat is = 1470 / ( (40-25) * 4.2 ) = 23 lts.

      So if the incoming water temperature is about 25 then with 10 lts water heater you can get 23 lts of hot water at 40 degrees (which is decently hot). A regular shower bath takes up 25 lts (unless you are used to having long shower).

    • sharad

      Well said. Thanks a lot for your valuable support.

      What happens after 23L hot water ?

      i am confused between 10L and 15L as i heard more capacity takes more time like 15L takes 20min while 10L takes 12min to heat water

    • Abhishek Jain

      If the water heater is switch on, it will continue heating the water. But it will not be able to heat the water to temperature that you need. You will have to wait for it to heat the water to the temperature you need. Certainly 10L will take less time to heat, but the total volume of hot water (at temperature at which you need) will be less as compared to 15L water heater. However if you go for bigger water heater and leave hot water in it, the water will loose heat with time and in turn the electricity used for heating goes waste and thus we suggest going for smaller sized water heater.

  • Anil

    So what do you suggest? This article is basically talking about storage water heaters not instant water heaters.

    What do you suggest for instant water heaters?

  • Avishek

    Shall we shut down a geyser once we have enough water for future use? Or it is fine to keep the geyser on even after cut off is reached? Which one is better efficiency wise and what are the advantages/disadvantages of both? Thanks.

    • Abhishek Jain

      It is better to switch off the geyser once you have enough water for use. Keeping it on you would waste electricity in form of standing losses.

  • Geetansh

    I want to fit a geyser in my washroom, which is for small family – 4 persons. I can fit a gyser of physical size – length 3 feet. Could you please suggest which gyser would best fit in my requirement. Also please let me know the capacity, brand and model of your suggested geysers. Thanks for your help!

    • Abhishek Jain

      Hi Geetansh,

      Is the constraint height or length. If it is length then you can go for vertical models like Havells Quatro, A O Smith HSE-SAS/SBS/SDS/SES models, Racold Eterno/Altero models, Bajaj Majesty GPU models. If it is height then you can look at Bajaj GMH RF or CP models or AO Smith EWSH model.

  • Anuj Seth

    I do not afree with your point of switching off the Geyser. I have noticed if we keep the Geyser on it saves electricity. Because the water inside the geyser is still at higher temp. than the input water temp. So The energy used to heat that water to 60C will be less than what you will use next day.

    These day we get Geysers which have good insulation and keep water hot till next day will less electricity.

    • Abhishek Jain

      The most efficient BEE 5 star rated geysers also have standing loss. So with best of insulation there is loss of heat. It’s better to avoid that.

  • P.Srinivasakumar

    What can be the maximum efficiency of the normal geysers?

    • Abhishek Jain

      The energy efficiency of geysers is mentioned in kWH of standing loss per day. Which means the amount of energy it will loose in the whole day if hot water is left in the geyser. The numbers differ for different sizes of geysers. Smaller geysers have low surface area so the loss is less, bigger geysers have higher surface area so the losses are more.

  • Sander Vandenhaute

    Hi

    Do you have any detailed, statistical information on the (hot) water usage of an average indian household (so not just 5 en 10 liters but like 6.231 and 9.345)?

    Thanks

    • Abhishek Jain

      Hi Sander,

      We do not have those numbers.

  • anikethan

    If i have a solar water heater, and there is an overcast in rainy season, How should i route the water from solar system through the geyser and what type of geyser should I buy

    • Abhishek Jain

      Hi Anikethan,

      There are two types of systems available in market: 1) Hybrid: which is a pre-integrated system. 2) Simple solar water heater with no integrated electric geyser. However in the hybrid system, the hot water output from solar water heater is put in the electric geyser. Electric geysers have thermostat which shuts off the electricity once the water reaches a certain temperature. This ensures that water is always hot to a certain degree. Now if you want your solar water heater to be integrated to your geyser, you just need to ensure that the piping in your house is such that the hot water output from solar water heater goes into the electric geyser (which can be any regular electric geyser). If the water is hot enough, then the electric geyser will not consume any electricity (thermostat will keep it off). If water is colder then the electric geyser will heat it. So you just need to ensure that the piping is such that the water from Solar Water heater goes into the regular geyser.

  • KP 7

    good helped a lot.

  • vijay

    Very useful points.

  • Dnyanesh Bodhe

    Ver Very well written.. excellent initiative…!

  • aravikumar

    Excellent info guys. Very helpful & well-written. Keep up the good work.

  • Abhishek Jain

    Hi Anuradha,

    We wrote about solar water heater on one of our posts: https://www.bijlibachao.com/solar/solar-water-heater-system-how-can-it-save-energy-and-its-prices-in-india.html . Do check it out and let us know if you have more questions.

    Regards,
    Abhishek

  • anuradha

    Hi abhishek,
    Could you please tell me the cost saving a 100 litre solar water heater would give in a period of two years as compared to a normal geyser of 100 litre.
    Regards,
    Anuradha.

  • furnace Rochester NY

    This is really going to help me in the related stuff..thanks for the information

  • Piyush Agrawal

    Hi Abhishek, I have many questions related to all electric equipments that is required in hotel like T.V., A.C., Geyser, Fan, lights, invertor, batteries, solar power etc. Let me know if I can post my questions here / can email you / call you.

    Regards,
    piyush0101 @ yahoo . com

  • Piyush Agrawal

    I am starting a 2* hotel of 30 rooms. Can you please recommend which geyser is good & what should be the size. Based on my understanding after reading the article above, I think one geyser per room, storage type water heater & size of 10L, should be good enough.

    Regards,
    Piyush

  • krishna reddy

    What is Cp Used in calculating units? Is it specific to heater?

    • Abhishek Jain

      Hi,

      Cp here refers to specific heat of water and it is no where related to the heater. To calculate ideal units, you can use this simple formula:

      Ideal Units = Volume of Water x Temperature Difference x 0.0012

      Regards,
      Abhishek

    • krishna reddy

      Thanks Abhishek, Yours work is truly appreciated. As you said ideal units, few more units get added depending upon standing loss. Lets say I’m using 15lts Kenstar water heater, as you mentioned in some other article, How long does it take to get to 60c temperature(winter season) after I switch on. Standing Loss is loss one it’s heated and left being unused, am I right? What If I use heated water immediately after switching off heater, there wont be any loss right? would the above geyser automatic switches off once it reaches 60c? will it keep heating for standing loss, if I switch on?

    • Abhishek Jain

      Let me try to answer your questions one by one:

      1) Assuming that the temperature of cold water in winters is 20oC. The units needed to heat water will be 0.72 units (calculated using the formula mentioned earlier). Now if the water heater is rated at 2 kW (or 2000 watts) then it will take 22 mins to heat up, if the heater is rated at 3 kW (or 3000 watts) then it will take 14 mins.

      2) Your understanding is right, standing loss is heat loss once the water is heated and left unused.

      3) Your understanding is right that if you use heated water immediately after switching off the heater, there will not be any loss.

      4) Most modern water heaters have thermostat which will switch off the heater once the temperature reaches 60oC. But if you leave the water unused and water heater switched on for a long time, the water will loose heat (standing loss) and the temperature will come down and then the heater will start again to maintain the temperature to 60oC. So effectively if you leave the water heater switched on for the whole day, then the electricity consumed will be Ideal units for heating the water + standing loss.

      Hope this helps.

      Regards,
      Abhishek

    • krishna reddy

      Thanks Abhishek, That helps a lot. Keep it up.

  • sneha

    even using induction heater you can get hot water right ..???? then why geyser ?? geyser is more efficient than induction heater but in what way..????

    • Abhishek Jain

      Geyser is more of an enclosed space which is well insulated. The heat exchange with the environment is very less thereby most of the energy given is used up to heat the water. And the hot water does not lose much heat.

      Whereas water heated with induction heater is in direct contact with air and can loose the energy when in contact with air. The water is not insulated.

      Although if you really heat the water immediately and use it, I do not think even induction heater would be much inefficient. Geyser has the benefit that you can keep the hot water stored. Also with geyser you can use the water in multiple taps and showers.

      Regards,
      Abhishek

    • hanmant

      Hey hi,
      for hot water what should I prefer electric geyser or induction stove.

    • Abhishek Jain

      Hi,

      Better than induction stove, I would suggest that you use an instant water heater. Although it is always better to use a small sized storage water heater (10-15 lts) and switch it on before use and switch it off as soon as water is heated.

      Regards,
      Abhishek

    • manoj

      Hi Abhishek,
      If one really has to save electricity to the tune of 80%, one should use air source hybrid heatpumps. Its much more reliable than solar and you get 24 hrs hot water. we have been giving this solution to Hotels, Hostels , Paying guests since a very long time and they recover their investment in less than one year.
      Induction heating water heater is also ready with us now for domestic use. We have been in water heating for 40 years with constant new technologies. We can also heat swimming pools at only 10-15% of normal expenditure having done more than 200 such installations.
      Please contact us at [email protected] based at bangalore

    • Abhishek Jain

      Thanks a lot for the information Manoj. We will surely research about it and will contact you for more details.

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