Fantech 12" Normally Closed Shut-off Damper with Motor (24V)

12" Normally Closed Shut-off Damper with Motor (24V) Shut-off damper ADC is a 2-position, motorized damper without end switch. The damper is powered open with 24V AC, and is normally closed with spring return. Power supply wiring is connected to the lead wires attached to the damper motor. Positive closure is provided by a tight seal Power Open Spring Closed (POSC) Tight seal provides positive closure