Some people think buying an energy-efficient window fan is not beneficial as it will affect the performance of the fan. This is a total misunderstanding that needs to correct. There is no harm in buying an energy-efficient fan as it will cost you no additional charges.
An energy-efficient window fan will consume up to 50% less electricity than an average window fan. This will help you save a few bucks every month from utility bills. Thus, you should definitely buy an energy-efficient fan to save your money in the long run.