iO HVAC Controls MD-3220-BM 32" X 20" Rectangular 2 Position Zone Damper - Belimo 3 Wire Actuator - Bottom MountiO HVAC Controls MD 3220 BM ACTUATORS ARE INSTALLED ON 2ND DIMENSION 32" x 20" Rectangular 2 Position Zone Damper Belimo 3 Wire Actuator Bottom Mount Height: 32 Width: 20 Total Size: 32 x 20 Actuator Placement on the dimension: 32 Additional Information Item NumberMD 3220 BM BrandiO HVAC Controls MotorizedYes ShapeRectangular Size (in)32 x 20 Spring ReturnSpring Return TypeRectangular Dampers