Motorized Rectangular Bottom Mount Dampers - 8" x 20"
Heavy duty frame. LED's show damper's position. Nylon bushings for quieter operation. Simple 3-wire hook-up. Motor mounted on second dimension specified. The ND damper has a 97% leak proof rating. Overlapping blades and a strong positive off motor insures accurate control of all zones. The ND dampers combined with the Ultra-Zone zoning system provides the most comfortable and reliable system in the industry. The easy access, quick connecting terminal block eliminates the need for wire nuts and allows for trouble free use. The motor is UL listed and NEMA Class 2 certified.