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Air intakes and outlets Roof cowls and External wall air intakes
Through-wall air intake - with backdraught damper and external wall grille

Through-wall air intake - with backdraught damper and external wall grille

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Description Packg. * Code
Through-wall air intake ø 100 with built-in backdraught damper and aluminium louvre grille 1 1615
Through-wall air intake ø 125 with built-in backdraught damper and aluminium louvre grille 1 1616
Through-wall air intake ø 150 with built-in backdraught damper and aluminium louvre grille 1 1617
* packaged quantities are shown for information purposes – All items can be ordered singly
Through-wall air intake ø 100 with built-in backdraught damper and aluminium louvre grille





These sleeves are used in through-wall configurations thickness 300–450 mm. The fixed sleeve is sealed into the masonry and the adjustment sleeve adapts the length for traversing the infill. 

The sleeve used with the grille fits directly into the fixed sleeve. Plan at least a 20mm overlap of one sleeve on the other and at least a 30mm overhang on the adjustment sleeve for connecting to the duct.

- 1 galvanized steel fixed sleeve

- 1 galvanized steel adjustment sleeve

- droplet-shaped aluminium grille, width 100mm, screwed to the adjustment sleeve.