3100 Series Damper - 48" x 48" w/Motor

Item Number: 113905MK Availability: Usually ships in 24 hours 
Motorized 3100 Series Dampers allow effortless control of airflow.

• Motorized Damper Kits include both the damper and the motor.
• Motors have a cable pulley, so no delay timer is needed for fan.
• Aluminum back draft dampers are engineered for strength and durability.
• Blades are sealed with full-length, vinyl weather stripping.
• Flanged mount frame and a profile of 1-1/8" allows dampers to fit in just about any wall.
• For those that don't need the full kit, dampers and motors can be purchased separately.