Rheem RXRF-KFA1 - Fresh Air Damper - Manual - 25%.
Rheem RXRF- Fresh Air Damper - Manual - 25%. The Rheem RXRF- 0-35% manual outside air system is designed to replace the unit duct cover. No drilling on the unit or field assembly is required. The amount of outside air is controlled by simply adjusting the slide damper. The panel is fully insulated.