6: Efficient Operation7: Thermostat Settings8: Programmable Thermostat9: Inspection10: Keep Registers Clean11: Trapped Air12: Pipe Insulation13: Inspect Ducts14: Duct Insulation15: Filter Replacement16: Reflectors17: Heat Flow18: Unused Rooms19: Air Conditioners20: Lower the Thermostat21: Maintain Humidity Levels22: Ceiling Fans23: Curtains
When buying a new furnace or boiler, look for the ENERGY STAR label.
