Ceiling Fan Power Consumption: Complete Guide

It’s hard to imagine a house without a ceiling fan. These are one of the most common electrical appliances present in almost every household. However, not many are aware of how much energy these ceiling fans consume.

In this post, we will give you all the information needed to figure out the electricity consumption of the humble ceiling fan. We have also covered the power consumption numbers for 5-star ceiling fans in India.

We will also try to answer whether it makes sense to shell out extra to purchase a power-efficient ceiling fan or should you go with a regular ceiling fan.

Ceiling Fan Wattage and Rating in India

The power consumption of a ceiling fan depends on several factors. These are:

  1. Wattage
  2. Usage based on weather and individual preferences
  3. Age of the ceiling
  4. Motor

Needless to say, wattage is an important criterion that will determine how much energy is consumed by your ceiling fan.

Most ceiling fans in India come with a power rating of up to 80 Watts.

It’s important to note that this wattage of ceiling fans depends on the length of the blades (sweep size), number of blades, fan speed.

You get ceiling fans with a blade length of 300 mm (30 cm) to 1400 mm (140 cm).

Needless to say, bigger fans consume more power.

Blade LengthWattagePower Consumption in units (in 1 hour)Ideal Room size in sq. ft.
300300.030<30
60035 to 500.04230 to 35
90060 to 700.06535 to 65
120070 to 750.07265 to 100
140075+0.075100 to 225

It is interesting to note that there is not much difference in power consumption of ceiling fans after 900 mm.

Hence, we can find out the power consumption of ceiling fans based in their ideal room size.

Fan Blade Length Power Consumption of Ceiling Fan in Units
Milimeter Inch 1 day (12 hours) 1 month  1 year
300 mm 12 inch 0.42 13 151
600 mm 24 inch 0.50 15 181
900 mm 35 inch 0.78 23 281
1200 mm 47 inch 0.86 26 311
1400 mm 55 inch 0.90 27 324
Fan Blade Length Electricity Bill in INR
Milimeter Inch 1 day (12 hours) 1 month  1 year
300 mm 12 inch 2.7 81 968
600 mm 24 inch 3.2 97 1161
900 mm 35 inch 5.0 150 1797
1200 mm 47 inch 5.5 166 1991
1400 mm 55 inch 5.8 173 2074

Power rate at Rs 6.4 per unit.

Please note that these numbers are for regular ceiling fans when run at full speed. Brands such as Atomberg, Usha, and Orient Electric also offer energy-saving models that consume only 28 – 32 Watts. However, all brands offer regular fans and our chart is true for regular ceiling fans.

Also, since the power consumption also depends on the speed of the fan, here is a quick comparison of power consumption with respect to the fan speed.

SpeedWatt-age of Ceiling Fan
900 mm1200 mm
Speed 112 Watts16 Watts
Speed 221 Watts27 Watts
Speed 330 Watts45 Watts
Speed 445 Watts55 Watts
Speed 565 Watts75 Watts

Energy Efficient Ceiling Fans in India

There are several ceiling fans in India that consume far less power as compared to regular ceiling fans. We have created a list of such fans for you.

BLDC Fan BEE star rated from Atomberg Technologies (amazon link) –

Orient Electric Fan (amazon link) –

BLDC Fan BEE star rated by Atomberg Technologies (amazon link) –

BEE Star Rating in Ceiling Fans

Whenever we talk about energy efficiency, BEE star labelling system cannot be ignored. If you are wondering what it means, then you are at the right place.

BEE star rating system was started by the government of India to empower appliance buyers with knowledge of their power consumption just by looking at the star rating.

The BEE label is on top of every appliance that is under the BEE program. All the models are rated from 1 to 5 star based on their energy consumption. 5-star rating means highest power efficiency, while 1 star means lowest power efficiency.

Needless to say, more than 99% BEE label ceiling fans in the market are 5-star fans.

Please note that the ceiling fan does not come under a mandatory scheme of BEE Star Label. Hence, you will not find any star rating on many ceiling fans.

Power Consumption as per BEE Star Label

The table here shows the minimum performance value that fans need to comply with based on their blade span:

Fan Blade Length (mm)Minimum Air Delivery (m3/minute)Minimum Service Value (m3/minute/Watt)
9001303.1
10501503.1
12002104.0
14002454.1
15002704.3

Fan blade size (fan sweep size) is the length of the fan’s wing.

Air delivery represents the amount of air swept by the fan upon testing in the lab. As per BEE documentation air delivery values are on the basis of air velocity measurement up to 15m/min.

Service value shows air delivery for every 1 watt consumed.

BEE Star rating for ceiling fans is based on sweep size.

For sweep size less than 1200 mm, below chart should be used.

Star RatingService Value
1 Star3.1 to 3.6
2 Star3.6 to 4.1
3 Star4.1 to 4.6
4 Star4.6 to 5.1
5 Star≥ 5.1

For sweep size greater than 1200 mm, below chart should be used.

Star RatingService Value
1 Star4.0 to 4.5 for 1200 mm 4.1 to 4.5 for 1400 mm 4.3 to 4.5 for 1500 mm
2 Star4.5 to 5.0
3 Star5.0 to 5
4 Star5.5 to 6.0
5 Star≥ 6.0

Source: https://www.beestarlabel.com/Content/Files/Schedule8-CF.pdf

If all this is confusing, you can just remember that a 5 star 1200 mm fan usually comes with a wattage of 30 to 35 Watts. This value is less than half of that of regular fans.

This is made possible because most 5-star ceiling fans come with BLDC motor. These are brushless motors that allow lesser friction and vibration, hence consume lower energy. Hence, BLDC fan can help you in reducing your electricity bills.

Because BLDC motor is so power-efficient it makes it possible to add functionalities such as wireless control (remote control

How to Calculate Power Consumption of Ceiling Fan from Watt-age

If you know the wattage rating of your ceiling fan, it becomes really easy to calculate the power consumption of ceiling fan. All you need to know is the duration of fan usage every day.

Formula for calculating ceiling power consumption and electricity bill is:

Watt-age (in kW) x Run time of fan per day (in hours) x Electricity consumption rates in units per hour

For example, let’s take an example of a regular 1200 mm fan in our house.

Fan Wattage = 70 Watts

Running Time per day = 12 hours

Power Rate = Rs. 6.4/kWh (Average in NCR)

To calculate hourly power consumption, all we have to do is divide wattage by 1000.

Hence hourly power consumption = 70/1000  

This value equals 0.07 Kilowatt-hour or kWh.

Now power consumption in 12 hours = 12 x 0.07 = 0.84

Electricity bill due to ceiling fan running for 8 hours = 6.4 x 0.84 = INR 5.4

Similarly, we can calculate power consumption in a month and in a year.

How to Save on Electricity Power Consumption of Fan

  • Go for BEE five star rated fans as they consume significantly less power for the same wattage than a regular fan without BEE rating. On top of this, the wattage of the fans is also less.
  • Try to purchase Brushless DC motor (BLDC) fans. They can consume as low as 30 watts for same speed and air delivery.
  • Ensure proper ventilation in the room by keeping your windows open while the fan is running
  • Replace older fans because as the age of fan progresses, it starts to use more power.
  • Run fan at lower speeds. Speed at 1 consumes significantly lower power as compared to speed at 3 or 5.
  • You can adjust the direction of the ceiling fan during summers, such that the air is pushed towards the downward direction.

Conclusion

A regular size ceiling fan comes with 70 – 80 Watts power rating. Even if the fan is run for 12 hours, it will consume no more than 0.96 kWh of power which is slightly less than 1 unit per day. Hence, fan wattage may not be the best deciding factor if you really want to save on overall electricity consumption in your home.

Still, 5-star ceiling fans are the most power-efficient fans out there. The BLDC motor ensures that the power consumption gets reduced to less than half of that of regular fan as it comes with a wattage of 30 – 35 Watts.

Since, power factor for fans is very close to 1, you can use the formula for electricity bill estimate: Watt-age (in kW) x Run time of fan per day (in hours) x Electricity consumption rates in units per hour

If you liked this post, then do comment in the box below and we will be happy to help.

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