NBS Source
List your products
Description

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.

General information
Uniclass 2015
Trickle vents (Pr_30_59_94_90)Primary
Specification data - Trickle vents
Product Reference

Window Acoustic Trickle Ventilator 771AK

Elements (external/ internal)

771 AK/ 787 AK

UK Standard. Adjustable ventilation. Equivalent area (maximum): 3,471 mm². Acoustic attenuation, open (maximum): 40 dB.

771 AK/ 686 N

Permanent ventilation. UK noncompliant. Equivalent area (maximum): 3,116 mm². Acoustic attenuation, open (maximum): 37 dB.

771 AK/ 788 P

Trickle ventilation. UK noncompliant. Equivalent area (maximum): 3,471 mm². Acoustic attenuation, open (maximum): 40 dB.

Finish (aluminium components) -
External

Anodized, natural

20 µ.

Polyester powder coating, RAL colour ___, sheen ___ %

60–70 µ.

Internal

Anodized, natural

20 µ.

Polyester powder coating, RAL colour ___, sheen ___ %

End caps

Black

White

Special colour, ___

Special order. Consult supplier.

Other requirements

Fixing screws

Stainless steel, A2 Philips head, 3.5 x 9 mm to DIN 7981.

Standard product features

Materials:

  • Aluminium alloy: AlMgSi 0.5 to DIN 1748.
  • Plastic endcaps: ASA polymer (Acrylonitrile Styrene Acrylate).

Product Options

Dimensions:

  • 686 N internal - Length: 475 mm. Requires two slots 172 x 12 mm. Height: 19 mm. Projection: 28 mm.
  • 771 AK external - Length: 415 mm. Requires two slots 172 x 12 mm. Height: 52.6 mm. Projection: 52 mm.
  • 787 AK internal - Length: 475 mm. Requires two slots 172 x 12 mm. Height: 33 mm. Projection: 15 mm.
  • 788 P internal - Length: 475 mm. Requires two slots 172 x 12 mm. Height: 33 mm. Projection: 15 mm.

Literature
Similar products from Renson Fabrications Ltd

© 2020 NBS Enterprises Ltd. All rights reserved.