Rheem AXRF-FBB1 - Fresh Air Damper - Motorized - 25%.
Fresh Air Damper - Motorized - 25%. The 0-35% manual outside air system is designed to replace the unit duct cover. No drilling on the unit or field assembly is required. A 2-position control motor opens the intake damper when the blower is energized. The amount of outside air is controlled by simply adjusting the slide damper.