Fantech 8" Normally Closed Shut-off Damper with Motor (24V)

8" Normally Closed Shut-off Damper with Motor (24V) Shut-off damper ADC is a turn off damper. The damper is provided with 24V AC motor with spring return actuator. Power connects to a connection block inside the electrical box. Positive closure is provided by a tight seal. Power Open Spring Closed (POSC) Tight seal provides positive closure