Window Acoustic Trickle Ventilator 771AK

Internal and external aluminium ventilator fittings for screw fixing over slots in window frames.

• Enables secure, weather resistant ventilation with exclusion of insects. Equivalent area 3,116–3,471 mm².

• Aluminium profiles with plastic endcaps. Choice of finish.

• Suitable for insertion into window frames with open internal void.

• Choice of models with variation in equivalent area and acoustic attenuation. Standard lengths.

• Projecting exterior element with projecting hood profile. Aluminium extrusion with plastic endcaps. Self regulating. Incorporates internal flap which closes as external wind speed rises.

• Projecting interior element with adjustable bottom hinged flap. Aluminium extrusion with plastic endcaps. Directs incoming air upwards to minimise draughts.

• Suitable for aluminium, PVC-U, wood or composite frames.

• Thermally broken in combination.

• Alternative models available with clip fixing.