Around 45% of your home’s energy is utilized for cooling and heating, but most heating and cooling go to unoccupied spaces. You also do not need to raise or decrease the temperature when sleeping. Each degree you decrease helps in consuming 1% less energy, so if you reduce the temperature by 15 degrees at night, you will use 15% less energy. The idea of a programmable thermostat works on this explanation and reduces your bills drastically. » learn more