Electricity Saving Tips For Homes And Offices

BEE 5 Star Rated Ceiling Fans: Myths And Realities

By on September 3, 2017

When we were setting up our house and were looking for electrical appliances to buy, our contractor, who was working on the electrical work, told us not to buy BEE 5 star ceiling fans. The reason he gave us was that there was complaints that BEE 5 star rated ceiling fans do not give good air delivery. We looked around for some data and agreed to what he was saying and installed a regular ceiling fan. Three years later (last week) we decided to give them a try and got the ceiling fans replaced. To our pleasant surprise we found the whole experience much better than what we expected. We write this article based on our experience auditing homes and also on our measurement of the old ceiling fans we replaced and the new one we bought.

Observations during home energy audits

While most people target only lights when they think about electricity savings, but fans contribute a lot more to the electricity bills and could be close to 30-40% of the electricity bills. Compared to lights that are switched on only in the evening (from 6 PM till midnight), ceiling fans are on for most part of the day and even during night. Also ceiling fans consume more electricity than a tubelight.

Myths and realities of 5 star rated ceiling fans

Most people believe that BEE 5 star rated fans deliver less air and using the same may not give similar comfort as a regular fan. Even when we look at the data (link: http://bit.ly/QLiRvi), we find that BEE 5 Star rated fans have minimum air delivery of about 210-220 CMM whereas regular fans have the value of 250 CMM. But when we replaced the fans in our home, we did not find much difference in the air delivery of old and the new fan. The new BEE 5 star rated fans are as good as the old ceiling fans and in fact we are quite happy to have newer fans in our house (in-tangible benefit). And the best part is that the earlier fans were rated at 75 Watts, but the new fans are rated at 50 Watts (30% savings). In fact some BEE 5 star rated fans are also rated at about 45 Watts.

How does it convert to numbers?

A typical ceiling fan runs for about 10-12 hours in a day (including a few hours at night). So if we look at usage and units, below are the numbers:

Regular Fan

5 star rated Fan

Wattage

75 W

50 W

Units Consumed Per Day (assuming 12 hours usage)

0.9

0.6

Units consumed in a month

27

18

Units consumed in a year

328

219

Cost of using fan in a year (at approx. Rs 5 a unit)

1642

1095

Above number show a clear saving of about Rs 600 per year (you can find per unit cost of electricity for you form our online calculator: Online Electricity Bill Calculator – For all states in India).

If we look at MRP of various fans available in the market, the MRP of regular ceiling fans is about Rs 1400 (non decorative) and those of 5 star rated fans is about Rs 1900. Which clearly shows that the money can be recovered in about a year of usage. And as the ceiling fans run for long, there will be savings afterward.

How we got our ceiling fans replaced

Unlike popular perception many private utilities (electricity distribution companies) are running programs that can help consumers reduce their electricity bills. They are also doing so as part of regulations from government. Being a customer of Tata Power in Mumbai, we got our old ceiling fans replaced for new ones at the cost of Rs 950 per piece (in exchange of old fans). Reliance Energy in Mumbai runs a similar program for ceiling fans. Even with that cost, if we look at above numbers, the return on investment will happen in about one and half years and we will save there after. So replacing old ceiling fans with new BEE 5 star rated fans also helps in reducing electricity bills.

The above numbers are just for 1 ceiling fan. In case you have multiple, you can save more on your electricity bills if you replace your old ceiling fans. Do let us know your feedback in case you have used energy efficient ceiling fans.


Related Articles



The short URL of the present article is: http://bgli.in/mXEle

Please use the commenting form below to ask any questions or to make a comment. Please do not put the same comment multiple times. Your comment will appear after sometime. Also please note that we do not reply to emails or comments on social media. So if you have any question, please put it in the form below and we will try to reply to it as soon as possible.


अगर आप के कुछ भी सवाल हैं, वह आप नीचे दिए हुए सवाल-जवाब सेक्शन में पूछ सकते हैं। आप अपने सवाल हिंदी में भी पूछ सकते हैं और हम आपको हिंदी में ही जवाब देंगे। कृपया एक ही सवाल को बार बार ना डालें। आप एक बार जब "submit " बटन दबाएंगे, उसके बाद आपका सवाल यहाँ दिखने में थोड़ा टाइम लगेगा। कृपया धैर्य रखें। अगर हमारे पास आपके सवाल का जवाब है तो हम उसे जल्दी से जल्दी जवाब देने की कोशिश करेंगे। कृपया अपने सवाल ई मेल या सोशल मीडिया पर ना डालें।

Add comment

E-mail is already registered on the site. Please use the Login form or enter another.

You entered an incorrect username or password

Sorry, you must be logged in to post a comment.

24 comments

by Newest
by Best by Newest by Oldest
1

please recommend me best table fan in term of energy consumption.

2
Abhishek Jain (Mod)

I am not aware of a good branded one that is available. Many small solar companies have small DC table fans, but they usually work on solar. Atomberg (a well known startup from IITBombay is planning to come up with one soon). Their Gorilla Ceiling Fan is already quite popular.

3

Bijli save is good thinking

4

i took your advice and changed all old heritage fans in my home. All 5 of them about 3 years ago with energy saving USHA fans. This was the single biggest source of reduction in my electricity bills. Thanks Bijli Bachao Team.

5
Abhishek Jain (Mod)

That's great news. It is great that you are saving good amount of electricity. I am glad that Bijli Bachao was helpful.

6

Good Evening Abhishek Sir,
I'm looking for an convection oven.We are 7 members family,which brand and what capacity i should go for pls suggest.

Thanks,
Regards.

7
Abhishek Jain (Mod)

Hello Mr Habib,

The size will depend on your needs and it will be very difficult for me to tell the right size. We have not done much research on Convection ovens, but in general IFB and Morphy Richards are quite popular on ecommerce sites. You can check these:

IFB 23 lts Convection Oven (Flipkart Link: http://fkrt.it/cfYhL!NNNN )
IFB 20 lts Convection Oven (Amazon Link: http://amzn.to/2up9E62 )
Morphy Richards 25 lts Convection Oven (Flipkart Link: http://fkrt.it/f66nBTuuuN )
Morphy Richards 23 lts Convection Oven (Amazon Link: http://amzn.to/2tUmOHu )

8

Hello Abhishek ji
I have seen ur video about gorilla fan on YouTube, you have used an energy meter of HPL make to measure how much energy is consumed bt the fan at various speeds, sir I want to purchase the same meter, can you help me in getting it, either by giving me the info from where I can get the same energy meter or how to purchase it, I have tried local shops here but they don't have this type of digital display meters. Thank you

9
Abhishek Jain (Mod)

Sorry, the one which was used to measure gorilla fan was a fabricated one. We purchased a single phase meter from the local market and got it fabricated. You can go for any single phase digital meter (which shows all the values: kWh, kW, Power Factor, etc) and get it fabricated by your local electrician.

10
Abhishek Jain (Mod)

This is the one which was used to measure the fan: http://amzn.to/2thNeko

11

I have 20 year old Fan. How much watts do you think it would be? I came to know today only that these are 20 year old fans. (I was not living here) I had spoken to a havells guy who told me that all fans are 62watts nowadays max 75watts.
As I was under the impression that fans took around 300 watts or minimum 150 watts and wanted to change fans to Superfan A1. (for my friend actually) This havells guy showed up 1900 rupees 62watt fans and told us that for office use where fan is only 10 hours only the difference in savings between superfan and this is not much.
Even though I said its a 35 Watt fan He said you will save only 42% which will not amount to much he it will take you 5 years to recover that money.
He said no need to change your old fans as you will not save much.
So Now by your calculations it seems that it will take 3 years to recover extra money saved on power if I got it for fan that 1500 rupees more. It could be even more saving if I got in for the Super fan.
So I feel the Havells guy fooled us. Is it so?

My Main question which I asked earlier what could be 20 year fans watts? Is it 300 or 150? So do you think I should change it right away. Will by electrician come to know by looking at it or my putting a power meter?
Thanks

12
Abhishek Jain (Mod)

Hi Raj,

Difficult to tell you the exact wattage, but then it would be about 150 watts. Now to give you some calculations:

Your current fan: 150 watts for 10 hours means it consume 150x10 =1500 Wh or 1.5 units of electricity in a day or for 20 working days it uses 1.5x20 = 30 units in a month and 30x12 = 360 units in a year.

If you go to a 62 watt fan then it will consume 62x10 = 620 Wh or 0.62 units, so for a month it would be 0.62 x 20 = 12.4 units in a month and 12.4*12 = 148.8 units in a year.

If you go for 35 watts fan then it will consume 35x10 = 350 Wh or 0.35 units, so for a month it would be 0.35 x 20 = 7 units in a month and 7x12 = 84 units in a year.

Now assuming that your cost of electricity is Rs 7 per unit (It can be higher as well depending on your city and tariff, also you are on commercial connection if you have an office).

So the yearly cost of operation:

current fan = 360x7 = Rs 2520
62 watts fan = 148.8x7 = Rs 1041.6
35 watts fan = 84x7 = Rs 588.

If your electricity cost is Rs 7 a unit then by changing your current fan to superfan, you save Rs 2000 a year. The cost of superfan is Rs 3500. So you can imagine the savings!! Also the fan has 5 years warranty.

As compared to 62 watts fan you save Rs 400 per year. Superfan would have costed Rs 1500 more, which could have been recovered in 3-4 years (again within warranty period).

And all this calculation assuming that you are running fans at top speed. If the speed is lower, then the savings are more in BLDC fans. Gorilla fan is just 28 watts fan.

13

How to select capacitor size of fan

14
Abhishek Jain (Mod)

I would suggest that you take it to your local electrical store. The shop keeper should be able to identify the size of the old capacitor and would suggest you a new one.

15

sir, u didnt mention which fans u used for ur tests. Also one more thing ........on one of the sites the power for Usha Technix 1200mm fan is given as 52W whereas its 45W on usha's website. Also rpm given is 385 whereas its 340 on usha ! so whats the real truth?

16
Abhishek Jain (Mod)

Hi,

I have tested Havells ES50, Superfan and Atomberg's Gorilla Fan.

17

Good, what were the results? Did superfan / atomberg fans have the same airflow as traditional fans?

18
Abhishek Jain (Mod)

Yes. They have the same airflow as traditional fans and consume lot less electricity.

19

I am using Super Fan recommended by you and It performance has been very good but you have not mentioned about Super fan ?

20
Abhishek Jain (Mod)

This specific article was written before SuperFan came into existence. Our top ten list ceiling fans and other pages do cover a lot about superfan.

21

In Mumbai Tata/Reliance are providing various schemes for their customers to shift to 5 star rating electrical appliances. Whether Maharashtra state distribution Co ( Mahavitaran ) or any other state/central government organization providing any kind of scheme to their customers?

22
Abhishek Jain (Mod)

Hello Mr Amar,

BEE has bachat lamp yojna for replacing lights, but I have not heard of such DSM programs by MahaDiscom.

23

I have purchased ceiling fan by crompton Greeves. Are they BEE5 star rated... whether they mention about that in their card or so.. please let me know. Where you will rate Crompton fans.. compared to other competitors in the market, curious to know to rate my judgement.

24
Abhishek Jain (Mod)

Hello Mr Radhakrishna,

Crompton Greeves or CG does have BEE 5 star rated fans. Which model have you purchased? The star rated fans have a BEE star label on the box (should be there on the card as well). CG is one of the leading brands for ceiling fans.

Top

Send this to a friend