However, ceiling fans won’t save energy if you run them without adjusting your regular HVAC system
Before the widespread use of air conditioning systems, the ceiling fan was the primary cooling source in many homes. Over time, with the rising popularity of HVAC systems, the use of ceiling fans drastically declined. Today, with rising energy prices and unrelenting energy awareness campaigns, many homeowners are rediscovering ceiling fans as a means to curb high air conditioning costs without compromising your home’s indoor comfort. Ceiling fans cool people and not rooms. Just like the wind feels cold when it blows over you, the ceiling fan creates the same effect. It is known as the wind-chill effect. As the ceiling fan rotates, the moving air will make you feel cooler, as it helps the natural cooling process of your body through evaporation. The more the air moves, the more moisture evaporates from your skin, providing the cooling effect. Since the ceiling fan’s function is to cool people, it achieves just that. It is not, by any means, a replacement for HVAC systems, especially in hotter temperatures. You can only use them in conjunction with air conditioners to create ideal cooling conditions and save cooling costs. However, ceiling fans won’t save energy if you run them without adjusting your regular HVAC system. They save energy when they enable you to lower your AC use. For instance, since the wind-chill effect makes you feel a few degrees cooler when your fan is on, it allows you to turn the thermostat up by up to four degrees and still feel just as cool. You won’t save a fortune without compromising your indoor environment.