Aluminium Louvre Grille 422

Components for site assembly of framed, double bank, fixed louvre aluminium ventilator, for exterior wall recess mounting.

  • Enables secure, weather resistant ventilation with exclusion of insects. Physical free area: 43 %.
  • Aluminium profiles with choice of finish. Blades at 33.33 mm centres.
  • Suitable for insertion into wall openings from exterior. 40 mm (maximum) flange overlap. 4 mm projecting external flange projection.
  • Choice of internal reveal fixing.
  • Dimensions (minimum): 150 x 150 mm. Made to measure.
  • Panel thickness: 50 mm.
  • Water tightness at wind speed 1 m/s: Class C (average), without water channel.
  • Components supplied uncut. May be subject to minimum quantities.
  • Similar model 421 available with single bank louvres and higher free area.

General information

Uniclass 2015

Pr_30_59_48_04 Aluminium louvre panel unitsPrimary


L10/650 Metal louvres

Specification data - Aluminium louvre panel units

Product Reference

Aluminium Louvre Grille 422, rectangular

Aluminium Louvre Grille 422, self-assembly


Single panel, aperture (w x h), ___ x ___ mm

Single panel, to outer edge of frame (w x h), ___ x ___ mm

Multiple panel, as drawing ___

Requires coupling bars.



Nonstandard option. Required for panels larger than 3 m².

Bracket type 1428

Standard option. Screw fix to reveal.

As drawing ___

Finish (aluminium components)

Anodized, natural

20 µ. Type E6/ C34 to DIN 17611.


Finish by others.

Polyester powder coating, white colour

60–70 µ.

Other requirements


Coupling bar

For multiple panel unit.

Drainage profile

Projecting drip for fixing to bottom flange.

Dust filter

With aluminium frame. Fixes to interior of louvre panel.

Mesh, 2.3 x 2.3 mm

Nonstandard option. Grade 304 stainless steel.

Mesh, 6 x 6 mm

Standard option. Grade 304 stainless steel.

Water channel

For insertion behind bottom louvre. Projecting internal collection channel with drip to exterior.

Standard product features


Aluminium alloy: AlMgSi 0.5 to DIN 1748.

Third party certifications
  • BSRIA Ltd: Water tightness testing to EN 13030
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