It is! In the sense that using a ceiling fan can help cut down on your air conditioner or heating use, thereby lowering the amount of electricity your home consumes. Generally, using a ceiling fan can help offset your thermostat by up to four degrees in either direction. Meaning that you can comfortably set your thermostat four degrees higher in the summer, and four degrees lower in the winter. Keep in mind that using a ceiling fan does still use electricity, but it is on part with the electricity used by a standard light bulb. In other words, it doesn’t use all that much!