Home > Companies > Renson Fabrications Ltd > Aluminium Louvre Grille 412

Framed, double-bank, fixed-louvre aluminium ventilator, for exterior wall recess-mounting.

  • Enables secure, weather resistant ventilation with exclusion of insects. Suitable for enclosure of high voltage installations. Physical free area: 39 %.
  • Aluminium profiles with choice of finish. Blades at 20 mm centres.
  • Suitable for insertion into wall openings from exterior. 23 mm (maximum) flange overlap.
  • Flange overlap (maximum): 21 mm overlap, 5 mm projection.
  • Flange projection: 5 mm.
  • Internal prefixed brackets for reveal fixing.
  • Dimensions without flange (minimum): 100 x 100 mm. Made to measure.
  • Similar model 412R available for circular apertures.

Related literature

The following content references this product:

Standard product features


Aluminium alloy: AlMgSi 0.5 to DIN 1748.

NBS Specification

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This product is associated with the following NBS Create clause:
45-25-50/305 Aluminium louvre panel units

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Renson Fabrications Ltd


+44 (0)1622 754123

Product reference

[Aluminium Louvre Grille 412, rectangular]
[Aluminium Louvre Grille 412, round]
[Aluminium Louvre Grille 412, self-assembly]


[Single panel, aperture (w x h x wall thickness), ___ x ___ 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.
[Brackets type 418]
Standard option. Screw fix to reveal.
[Pre-installation frame]
[Spring clips type 419]
Nonstandard option. For small panels.
[As drawing ___]

Finish (aluminium components)

[Anodized, natural]
20 µ. Type E6/ C34 to DIN 17611. Diameter (maximum in one piece): 1400 mm.
[Polyester powder coating, RAL colour ___, sheen ___ %]
60–70 µ. Diameter (maximum in one piece): 1500 mm.
[Polyester powder coating, Syntha Pulvin colour ___, sheen ___ %]
60–70 µ. Diameter (maximum in one piece): 1500 mm.

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.
[Earthing lug]
[Insect mesh, 2.3 x 2.3 mm]
Standard option. Grade 304 stainless steel.
[Insect mesh, 6 x 6 mm]
Nonstandard option. Grade 304 stainless steel.
[Water channel]
For insertion behind bottom louvre. Projecting internal collection channel with drip to exterior.

Manufacturer details

Fairfax Units 1 - 5,
Bircholt Road,
Parkwood Industrial Estate,
Kent, ME15 9SF
Tel +44 (0)1622 754123
Fax +44 (0)1622 689478
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