Ceiling Fan / April 23, 2018 / Anne Perkins
Turn off air conditioning when using ceiling fans. The majority of energy cost savings comes from using ceiling fans instead of the air conditioner. Ceiling fans use from 50 to 90 watts (not including lights). Compare this to a central air conditioner using 2000 to 3000 watts; a window air conditioner can use 600 to 800 watts. The ceiling fan uses far less energy. As the temperature in your house rises, try to use ceiling fans to keep comfortable. But at some point the fans will not be able to keep you cool. Turn off the ceiling fans and start the air conditioner. The longer you can delay turning on the air conditioner, the more energy you save.
Here are a few more tips to consider while you're shopping for the right fan(s). The size of the room determines the span of the blade you should be looking for. You'll find blade spans that range between 29\" to 56\". The smallest blade span will work for a room that is no bigger than 50 square feet while a 36\" blade span will service an area of approximately 70' to 80' square feet. Larger rooms, such as 100 square feet need at least a 42\" blade span and a room that is larger than 100 square feet should have a fan with the longest blade span you can find.