Greenheck’s IAQ-42 air flow measuring control damper utilizes patented Speciflow™ Technology built into the controller to measure the pressure, position of the damper blades, and temperature of the air flowing through the damper. The IAQ-42 will control air to prevent over ventilation, under ventilation and provide energy savings during low occupancy periods. The IAQ-42 can help buildings meet the indoor/outdoor air requirements of ASHRAE Standard 62 and California Title 24 by providing accurate monitoring and control of outside air.