The Aprilaire 8100 Energy Recovery Ventilator is designed to work in conjunction with the home’s forced air system, or totally independent, incorporating its own duct system to provide the homeowner with 1) a supply of fresh air distributed into the living space and 2) to exhaust stale air from the home to the outdoors through the EnergyMax Transfer Core. It is designed to handle homes with up to 3,600 ft of living space.