Use ceiling fans
Ceiling fans can help you lower air conditioning costs in the summer and keep you more comfortable in the winter, according to Energy Star.
During the summer, use the ceiling fan in a counterclockwise direction, NStar said. If you raise your thermostat by two degrees while a ceiling fan is running, you can lower air conditioning costs by up to 14 percent over the course of the cooling season, Energy Star said.
In the winter, you should reverse the ceiling fan motor and operate it at a low speed in the opposite direction. This produces a gentle updraft, which forces warm air near the ceiling down into the living space, Energy Star said.