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Slim thermally improved glazed-in ventilator


Variglaze is a thermally improved glazed-in aluminium ventilator that provides an Equivalent Area (EA) of 5400mm² per metre of extrusion (equal to vent length minus 78mm).

Its slim size minimises impact on window sight size. The Variglaze is available in made to measure sizes or in bar length in a variety of colours.

Suitable for

  • PVCu

Features & Benefits

  • Slim size minimises impact on window sight size
  • 2500mm² EA at 540mm long 5000mm² EA at 1005mm long
  • Supplied made-to-measure or in bar length (pre painted only)
  • Bar length for cutting to size by customer (pre painted only)
  • Suitable for 20, 22, 24 or 28mm glass thicknesses
  • Aluminium or white plastic canopy
  • Dual hardness flap gasket improves weather tightness
  • Minimal projection for inline patio doors
  • Thermally improved
  • Available in Gas Regulations version, complies with BS5440 Part 2
  • Retrofit or fitted cord control unit
  • When specified correctly complies with Building Regulations

Technical Information

Technical Information


Product 20mm Glass Thickness  22mm Glass Thickness  24mm Glass Thickness 28mm Glass Thickness
178-299 GV12301 GV12351 GV12401 GV12501
300-399 GV12302 GV12352 GV12402 GV12502
400-499 GV12303 GV12353 GV12403 GV12503
500-599 GV12304 GV12354 GV12404 GV12504
600-699 GV12305 GV12355 GV12405 GV12505
700-799 GV12306 GV12356 GV12406 GV12506
800-899 GV12307 GV12357 GV12407 GV12507
900-999 GV12308 GV12358 GV12408 GV12508
1000-1199 GV12309 GV12359 GV12409 GV12509
1200-1500 GV12310 GV12360 GV12410 GV12510

EA figures above and marked on vents are achieved when fitted to manufacturer’s recommendations.
Tested in accordance with BS:EN 13141-1 (2004).

Manufactured from

Aluminium 6063 HIT T6, component parts PVCu, POM, PA6 & PP (UV Stable)


Tested in accordance with BS EN 13141-1:2004 (airflow, air leakage and weather tightness)
Acoustic performance tested in accordance with BS EN ISO20140-10:1992, BS EN ISO140-10:1991 and single figures to BS EN ISO717-1:1991


(Full test details available on request)
Equivalent Area (EA) (mm²) – 5400 per metre of extrusion*
Free Area (mm²) – 9650 per metre of extrusion*
(*extrusion length should be calculated as the overall length minus 78mm)
Air Leakage (m³/hr @ 50Pa) – 500mm overall length – 2.49
Water Resistance (Pa) – 300
Acoustic Dn,e,w (+/-) – 500mm overall length – vent closed 48 (-1;-1), vent open 33 (0;-2)


Suffix product code with:
-387 (white with white PVCu canopy), -020 (white with white aluminium canopy), -475 (white with black aluminium canopy)



Manuals and Documentation

Variglaze - Bar Length Assembly Instructions

147.65 KB (English)

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Variglaze - Catalogue Page

1.44 MB (English)

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