The SeaHawk Back Draught Shutter is made with galvanised sheet steel housing and Aluminium spring operated flaps which close when there is no positive air movement, preventing any air back-flowing when fans are turned off.  Back Draught Shutters are useful when dialing in the ventilation system and controlling pests in the grow space. air pressure from the fan opens the flaps, and allows air through the shutter.

Air pressure from the fan opens the flaps, and allows air through the shutter. Once the fan is off the flaps close without the air pressure so no air or light can pass back through the shutter.

Closed - Once the fan is off, no air (or light) can pass back through the shutter.

When installing the seaHawk Back Draught Shutter it needs to be positioned with the hinge area vertically.

Available in 150mm and 200mm.