Cold air can seep into a house through unsealed spaces. The housing specialist also recommended weather stripping around doors and windows to close gaps. Set thermostats on the lowest comfortable temperature during the cooler seasons. Graham said to decrease the setting on the thermostat by about 10 degrees before leaving town for a few days, and do not turn it up suddenly when arriving home again. Also remember to change filters once a month.
Clean filters help maintain clean air and provide a more efficient system.
People who live in homes with fireplaces should realize that an open damper is a way for heat to escape the house. Fireplaces don't have a forced air system, so a good bit of heat from a fire can exit through the chimney instead of coming into the room and house. Recommendations on this web site do not endorse any commercial products or trade names.