A ceiling fan is essential home electrical, especially during the hot summer months. Many may argue that air conditioning systems have reduced the importance of ceiling fans significantly. But this is not true. AC units consume 3600 watts of energy on an average while ceiling fans consume about 60 watts of energy. Thus, ceiling fans save a lot more energy as compared to AC units. Moreover, even the highly advanced ceiling fans cost less than AC units which makes them much more affordable than AC units.
Calculating Energy Cost
Ceiling fans do not use a lot of electricity but the cost to run it per hour or per day depends upon its usage. Power of the motor which rotates the blades is the critical factor which must be determined to calculate the energy cost of a ceiling fan. The manufacturer on its label specifies the power rating of a ceiling fan in watts. Find out the cost of per kilowatt-hour charged by your electricity supply company and multiply it with the wattage of your ceiling fan. Thereafter, divide the result by 1000 to convert it into kilowatt-hours. The result is the cost of running your ceiling fan for an hour. Determine the number of hours you run your fan in a day and multiply it with kilowatt per hour cost, which was calculated first to get the cost of running your ceiling fan per day.
Nowadays, many models of ceiling fans are equipped with lights. In such a ceiling fan, the energy consumed by the light bulb has to be taken into consideration as well. The same formula is applied. Multiply the wattage of the bulb by the per kilowatt-hour cost and dividing the result by 1000. Now determine the number of hours the light is switched on irrespective of the number of hours the fan rotates in a day. For example, if the fan is run for 6 hours, but the light is kept on for 3 hours in a day, then consider 3 hours only. Multiply the number of hours by per kilowatt-hour cost to get the cost of running the light in a day. Finally, add the energy cost of the light to the energy cost of running the fan to get the final energy cost of the ceiling fan with light.
Factors Affecting Electricity Consumption
The power of the motor determines how much electricity a ceiling fan consumes. Greater the wattage more is energy consumption. The modern BLDC motors are much more energy-efficient as compared to conventional motors. Ceiling fans equipped with BLDC motors consume much less power as compared to normal ceiling fans but give optimal performance.
Greater the airflow rate and RPM of the ceiling fan, more will be its power rating. The size of the ceiling fan is also directly proportional to its size.
Light bulbs used in ceiling fans usually have power rating ranging between 40-100 W. Modern LED bulbs, on the other hand, consume much less power.