This commercial secondary windows savings calculator generates separate savings for heating, HVAC auxiliaries, and cooling based on a data set developed from parametric Energy Plus runs using prototype models developed for and by the Bonneville Power Administration, in partnership with the Partnership for Advanced Window Solutions (PAWS).

Models address mid-sized offices, large offices, small hotels, large hotels, primary schools, secondary schools, small hospitals, mid-rise multifamily, and low-rise multifamily. The dataset is representative of climate variations throughout United States climate zones.