Framed, single bank, adjustable louvre aluminium ventilator, for insertion into window frames.

  • Enables secure, weather resistant ventilation with exclusion of insects. Physical free area: 53 %.
  • Aluminium profiles with choice of finish. Blades at 100 mm centres. Angle adjustable by interior frame-mounted lever.
  • Suitable for insertion into glazing aperture of double glazed window.
  • Choice of unit to suit glazing unit thickness.
  • Projection of nib to glazing rebate. 40 mm.
  • 25 mm projecting external profile.
  • Projection of internal profile variable with equivalent glazing thickness.
  • Suitable for aluminium, PVC-U, wood or composite frames, including curtain wall.
  • Dimensions (minimum): 377 x 377 mm. Made to measure.

General information


Aluminium alloy: AlMgSi 0.5 to DIN 1748

Uniclass 2015

Pr_30_59_48_04 Aluminium louvre panel unitsPrimary


L10/10 Wood windows

L10/15 Wood windows

L10/20 Steel windows

L10/210 Wood windows

L10/250 Wood windows

L10/30 PVC-U windows

L10/31 PVC-U windows

L10/315 Steel windows

L10/33 Proprietary windows

L10/330 Aluminium windows

L10/335 Aluminium windows

L10/350 PVC-U windows

L10/380 PVC-U windows

L10/390 Proprietary windows

Specification data - Aluminium louvre panel units

Product Reference

Aluminium Louvre Grille 427GL


Visible aperture (w x h), ___ x ___ mm

Depth of glazing rebate, ___ mm

As drawing ___

Equivalent glazing thickness

24 mm

Standard option.

___ mm

Nonstandard option. Available 8–50 mm.

Finish (aluminium components)

Anodized, bronze

25 µ. Type E6/ EV1 to DIN 17611.

Anodized, natural

25 µ. Type E6/ C34 to DIN 17611.

Polyester powder coating, RAL colour ___, sheen ___ %

60–70 µ.

Polyester powder coating, Syntha Pulvin colour ___, sheen ___ %

60–70 µ.

Other requirements


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.

Standard product features


Aluminium alloy: AlMgSi 0.5 to DIN 1748.

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