Alpine Ventilation has a range of snap-in round cone diffusers in 3 sizes. Cone diffusers are installed in the ceiling and are great for cooling applications. They can also be used for heating and air extraction.
They are constructed from UV stabilised ABS that will not go brittle or yellow with age. The 3 neck sizes are 200, 250 and 300mm. Note that corresponding face and cut-out sizes are larger. Clips snap onto the plaster for easy and fast installation. Ducting is attached to the neck at the top with worm clamps and/or duct tape.
The flow can be regulated by spinning the central round disk to increase or decrease air flow.
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