Zone Forced Air In the zone forced air section of the library, zone force air library members can be viewed, modified, or created for use in a TRACE project file. The following zone forced air types are available: Dehumidifier Four-Pipe Fan Coils Unit Heaters Water Source Heat Pumps Energy Recovery Ventilators Packaged Terminal Air Conditioners Unit Ventilators Window Air Conditioner Evaporative Cooler Units Packaged Terminal Heat Pumps VRF Indoor Unit Heat Pumps back to Equipment Library