The OA damper is Generally an integral Portion of the AH system and its controls. In automatically controlled AH programs, the OA damper will open up and close according to a number of variables: the surface air temperature, humidity, and dew position temperature; the amount of people during the creating; https://griffincthvi.oblogation.com/35722689/detailed-notes-on-air-control-dampers-for-hot-climates