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Back Draft Shutter 125 mm Metal
The Back Draft Shutter 125 mm Metal is the most widely used size in residential and semi-professional ventilation. It automatically blocks reverse airflow in Ø125 mm ducts — no power needed. Suitable for bathrooms, kitchens, toilets, garages, workshops and grow rooms. Durable metal build for lasting performance.
Back Draft Shutter 125 mm Metal – The go-to size for most ventilation systems
The 125 mm diameter is the standard choice across a huge range of ventilation setups, from domestic bathroom fans to semi-professional extraction systems. The Back Draft Shutter 125 mm Metal takes advantage of that compatibility, offering reliable one-way airflow control wherever it's needed. Common applications include bathroom and toilet ventilation, kitchen extractor hoods, garage air systems, workshop extraction and indoor grow rooms. Browse all available sizes in our back draft shutter category.
Passive protection that never switches off
The shutter requires no power or manual adjustment. Airflow pressure pushes the flap open; gravity closes it again the moment the fan stops. That means continuous protection against cold drafts, cooking smells, neighbour odours and humidity — even when the extractor is idle.
Why metal over plastic?
In damp environments like bathrooms and kitchens, metal outlasts plastic — it handles condensation, heat and temperature swings without warping or degrading. This coupler connects two standard Ø125 mm air tubes. For a quieter setup, pair it with a soundproof casing 125 mm. Fast delivery across Belgium.
Does the Back Draft Shutter 125 mm need to be wired in or powered?
No — it works entirely passively. The flap opens when air flows through and closes by gravity when the fan stops. There are no electrical connections, no batteries and no settings to configure. Just fit it in line with your 125 mm duct and it works immediately.
