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New! ThermGard TG50 Roof Glazing System

  • Wide Spans
  • Low Pitch
  • Non-Fragile

Shop Online For A Wide Selection Of Rooflights

Lonsdale Roofing

GlazaTherm Roof Vent Size Matrix

Width (W) mm & Length (L) mm are O/A Fixed Frame Sizes

Width-W
Length-L 600 700 800 900 1000 1100 1200
600 0.28 0.31 0.34 0.37 0.40 0.43 0.46
0.50 0.56 0.61 0.67 0.72 0.78 0.83
700 0.31 0.34 0.37 0.40 0.43 0.46 0.49
0.56 0.62 0.67 0.73 0.78 0.84 0.89
800 0.34 0.37 0.40 0.43 0.46 0.49 0.52
0.61 0.67 0.72 0.78 0.83 0.89 0.94
900 0.37 0.40 0.43 0.46 0.49 0.52 0.55
0.67 0.73 0.78 0.84 0.89 0.95 1.00
1000 0.40 0.43 0.46 0.49 0.52 0.55 0.58
0.72 0.78 0.83 0.89 0.94 1.00 1.05
1100 0.43 0.46 0.49 0.52 0.55 0.58 0.61
0.78 0.84 0.89 0.95 1.00 1.06 1.11
1200 0.46 0.49 0.52 0.55 0.58 0.61 0.64
0.83 0.89 0.94 1.00 1.05 1.11 1.16
1500 0.55 0.58 0.61 0.64 0.67 0.70 0.73
1.00 1.06 1.11 1.17 1.22 1.28 1.33
0.64 0.67 0.70 0.73 0.76 0.79 0.82
1.16 1.22 1.27 1.33 1.38 1.44 1.49
2000 0.70 0.73 0.76 0.79 0.82 0.85 0.88
1.27 1.33 1.38 1.44 1.49 1.55 1.60
2400 0.82 0.85 0.88
1.49 1.55 1.60

Approx Free Air Area m2 – based upon opening actuator stroke lengths: 300mm, 550mm
Side Hung Vents are restricted to 1.20m2 (Width x Length) with max O/A Fixed Frame Length 1800mm
If the size you require is outside the boundaries of the above matrix, please contact our Sales Office 0n 0208 801 4221