Buy 4 get 1 FREE on 20kg gravel bags! (Add 5 bags to your basket - T&C's apply)
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Adjustable ventilator to provide ventilation beneath suspended ground floors up to 5 brick courses. With incorporated grille to prevent vermin entry. The vertical height of the ventilator unit adjusts to suit between 3 and 5 brick courses (225mm-375mm) with a minimum cavity width of 50mm.
Telescopic and adjustable for a step of 3, 4 or 5 brick courses
Horizontal and vertical extension accessories available
Free area of 8000mm2 per unit when installed without 1201AB airbrick
Free area of 6500mm2 per unit when installed with 1201AB airbrick
Equivalent area of 6170mm2 per unit when installed with 1201AB airbrick
Special grille included to prevent entry of vermin
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