iO HVAC Controls MD-3212-BM 32" X 12" Rectangular 2 Position Zone Damper - Belimo 3 Wire Actuator- Bottom MountiO HVAC Controls MD 3212 BM ACTUATORS ARE INSTALLED ON 2ND DIMENSION 32" x 12" Rectangular 2 Position Zone Damper Belimo 3 Wire Actuator Bottom Mount 32" x 12" Rectangular 2 Position Zone Damper Belimo 3 Wire Actuator Bottom Mount, PO PC, 60 Second Actuator timing, 2. 5 VA, 24V For use with the iO ESP Zone Panels or any zone panels needing 3 wire dampers 5 YEAR WARRANTY Additional Information Item NumberMD 3212 BM BrandiO HVAC Controls