The OA damper is Ordinarily an integral part of the AH method and its controls. In instantly controlled AH systems, the OA damper will open and shut based upon many things: the outside air temperature, humidity, and dew place temperature; the amount of men and women while in the making; https://aircontroldampersforhotcl45666.mybuzzblog.com/16495923/air-control-dampers-for-engine-sheds-for-dummies