Power Consumption of a Fan

Are you planning to buy new fans for your home or office? Or are you just curious to know about how much electricity a fan uses? Whatever the reasons, you can get your answers here. Here you’ll find info about the energy consumption of a ceiling and a pedestal fan.

Going through the below info, you can easily decide which fan is efficient. You’ll also find some tips on how you can save energy while using fans. So, without further ado, let’s get started.

How Much Electricity Does a Fan Use?

How much power a fan consumes depends on three important factors, which are: –

  • Sweep or radius of the blades
  • Air Delivery Rate
  • Revolutions per minute of the motor

However, most ceiling fans consume somewhere around 60-100 Watts of energy. Please consider this value as an average. And if you need specific wattage for your fan, you need to Google your model and brand. Once you do, you’ll get the exact number of units or watts it consumes.

Let’s understand what’s watt, kilowatt and kilowatt hours

If you’re confused about the above terms, it’s the right time to clear your doubts. Watt and kilowatt are units of electricity. Say, for example, if you have a 75-watt fan, it’ll consume energy at the rate of 75 watts per hour. And 1 kilowatt is equal to 1000 watts.

Now, Kilowatt-hour is the energy a device consumes in an hour. A 75-watt fan will consume 75 watts * 24 hours = 1800 watts hour or 1.8 kilowatt-hours of electricity in twenty-four hours. It means the fan will consume 1.8 units if used constantly for a day.

Here’s a more vivid example

Say you have 3 ceiling fans of each 70 watts at your house. And all of these fans run for 8 hours during the day and 4 hours during the night. In this example, we’ll calculate how much electricity bill you’ll pay at the end of the month.

Total hours each fan is used every day = 12

We’ll do the calculations for one fan and then multiply with 3.

  • Power consumed by a fan in one day = Power Rating X Hours used
  • Power consumed by a fan in one day = 70-watt X 12 hours
  • Power consumed by a fan in one day = 840-watt hours
  • Power consumed by a fan in one month = 840-watt hours X 30 (Days in a month)
  • Power consumed by a fan in one month = 25,200-watt-hours = 25.2 kWh

Let’s say power consumed in a month is 25 kWh. So, for three fans, the power consumed in a month is 25X 3 = 75 kWh.

What’s the Bill you Need to Pay for Using your Fan?

It depends on where you live. Some places have a tariff charge of Rs. 4 per unit, while the majority of the areas in India have a tariff above Rs. 8 per unit or per kWh. Let’s suppose in your area electricity tariff is Rs. 10 per kWh. So, we have three 70-watt fans that are used for 12 hours each day.

The bill you’ll get will be 75kWh*Rs10/kWh = Rs.750

OPERATIONAL HOURSPOWER CONSUMED BY A 70-WATT FANELECTRICITY BILL (RS)
1 hour70 X 1 = 70-watt hour0.070 X 10 = Rs 0.70
12 hours in a day70 X 12 = 840watt hour0.8 X 10 = Rs 8.0
12 X 30 = 360 hours in a month70 X 360 = 25-kilowatt hour25 X 10 = Rs 250

Rs. 250 per month is the charge of one fan. So, for three fans, it’ll be 250*3 = Rs.750.

How Much Power a Pedestal Fan or Table Fan Use?

Pedestal fans have low power consumption than the ceiling fan. It is largely because of the small radius of the pedestal fan blades. Usually, the pedestal fans are around 16 inches in radius. Pedestal fans are portable and deliver a better airflow as they stand on a vertical rod.

Generally, pedestal fans are rated between 50-60 watts. The reason behind this consumption is the high amount of revolutions pedestal fans offer. You can mount certain pedestal fans on the rod, while some come with a rod and a stand.

To understand how much energy a 60-watt pedestal fan consumes in a month, look at the below table. The table shows data when the fan is used for 10 hours a day and tariff charges, are Rs. 10 per kWh.

OPERATIONAL HOURSPOWER CONSUMED BY A 60-WATT PEDESTAL FANELECTRICITY BILL (RS)
1 hour60 X 1 = 60-watt hour0.060 X 10 = Rs 0.60
10 hours in a day60 X 10 = 600watt hour0.6 X 10 = Rs 6.0
10 X 30 = 300 hours in a month60 X 300 = 18-kilowatt hour18 X 10 = Rs 180

How Can You Save the Electricity Bill?

Fans don’t consume too much energy, right? What if you could still save on your energy bills? Let’s help you do so. Here are some common ways of reducing your electricity bills:

  • Make sure to buy fans with a BEE energy star rating. Such fans are around 15% more efficient than conventional fans.
  • Buy fans with brushless DC motor or BLDC motor fans. Such fans consume as low as 30 watts of energy and deliver the same airflow.
  • Turn off the fans when you’re not using them. It might sound cliché, but it works and goes for all the electric appliances.

Conclusion

It’s quite good to know about how much energy a fan consumes. After all, it’s one of the most commonly used things at our home or at offices. When you know how much energy a fan consumes, you can determine whether or not you have an efficient fan.

This way, you can either buy a more energy-efficient fan or reduce the usage. You can follow some points in the ‘how can you save electricity bill’ section and make the best use of power. If you liked the above insights, do share them with others.

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