Central air conditioning, cooling and whole-house ventilation system

摘要

A central air conditioning and ventilating system has an exterior air intake duct and a plurality of dampers for opening and closing air ducts. One damper is positioned in the exterior air intake duct and a second damper is positioned in the interior of a return air duct and a third damper is positioned in the interior return air duct escape air duct. The first damper can be opened while the second damper is closed and a third damper opened to convert the air conditioning system to a whole house ventilation system.