Back draught shutters
The back draught shutter or non-return valve is fitted between two spiral ducts. When the fan is switched off, the valve is closed. This allows air to flow in one direction only. A backdraft damper is often used in the duct after an extractor hood. Using the shutter can prevent cold air currents from entering the house.
A back draught shutter is made of galvanised steel with an aluminium valve blade, the shaft and spring are made of stainless steel. Each shutter is internally sealed with a rubber edge to reduce noise and is available in a range of diameters on our webshop.
Would you like to install a back draught shutter? Read the following article on how to easily do it yourself.
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Mirjam van Werde
Customer service representative