In HERS ratings, what role does air sealing play?

Air sealing is a critical component in optimizing energy efficiency and enhancing comfort in a home. By effectively sealing gaps and cracks in the building envelope, air sealing minimizes the amount of conditioned air that escapes from the home and prevents outside air from entering. This process directly contributes to reducing heating and cooling loads, which in turn lowers energy consumption and utility costs.

In terms of overall efficiency, a home that is properly air-sealed allows heating and cooling systems to operate more effectively, as they do not have to work as hard to maintain a comfortable indoor temperature. Additionally, improved air sealing contributes to a more consistent temperature throughout the home, reducing drafts and enhancing the comfort of the occupants.

While air sealing may have some indirect benefits related to moisture control, particularly in preventing the inward infiltration of humid air, its primary role in the context of HERS ratings is centered on preventing unnecessary energy loss and improving overall efficiency and comfort. The other options either misrepresent the primary function of air sealing or emphasize aspects that are secondary benefits.