Tested and certified in accordance with BS EN 12101-2. Our range of AOV Smoke vents are designed to automatically extract smoke in the event of a fire
  • Meet standards for safety, security, non-fagility and fire safety
  • All the sizes listed achieve a higher Aerodynamic Free Area of more than 1.0 Aa m2 in a Lobby and 0.70 Aa m2 in a stairwell as per the requirement of EN 12101-2, not the grey area ""free vent area"" that is often quoted.
  • Opens to 140° in under 1 minute as per BS EN12101-2
  • Available with or without wind deflectors
  • Can be integrated with building management systems or be independently controlled
 
Aerodynamic free area - AOV Smoke Vents with PVC Kerb(Aa)Aa
Smoke Vent Size (Note: Rectangular Sizes are Hinged on the Long Side) Daylight free area* Size Roof opening area (m2) Standard (no Wind deflectors) With Wind deflectors Free Area (m2)
Cv Aa m2 Cv Aa m2
1200 x 1050mm 1050 x 900mm 1.26 0.42 0.53* 0.63 0.79 0.88
1350 x 1050mm 1200 x 900mm 1.42 0.40 0.57* 0.64 0.90 0.99
1500 x 1050mm 1350 x 900mm 1.58 0.39 0.61* 0.64 1.01 1.12
1200 x 1200mm 1050 x 1050mm 1.44 0.44 0.63* 0.62 0.90 1.01
1350 x 1200mm 1200 x 1050mm 1.62 0.42 0.68* 0.63 1.02 1.16
1500 x 1200mm 1350 x 1050mm 1.80 0.40 0.72 0.64 1.15 1.32
1350 x 1350mm 1200 x 1200mm 1.82 0.43 0.78 0.63 1.14 1.34
1500 x 1350mm 1350 x 1200mm 2.03 0.41 0.83 0.64 1.29 1.52
1500 x 1500mm 1350 x 1350mm 2.25 0.42 0.95 0.63 1.42 1.72
 
Aerodynamic free area - AOV Smoke Vents with DF Kerb(Aa)Aa
Smoke Vent Size (Note: Rectangular Sizes are Hinged on the Long Side) Daylight free area* Size Roof opening area (m2) Standard (no Wind deflectors) With Wind deflectors
Cv Aa m2 Cv Aa m2
1200 x 1050mm 1050 x 900mm 0.95 0.46 0.43* 0.61 0.58
1350 x 1050mm 1200 x 900mm 1.08 0.44 0.48* 0.61 0.66
1500 x 1050mm 1350 x 900mm 1.22 0.42 0.51* 0.61 0.74
1200 x 1200mm 1050 x 1050mm 1.10 0.47 0.52* 0.61 0.67
1350 x 1200mm 1200 x 1050mm 1.26 0.45 0.57* 0.61 0.77
1500 x 1200mm 1350 x 1050mm 1.42 0.43 0.61* 0.61 0.86
1350 x 1350mm 1200 x 1200mm 1.44 0.40 0.67* 0.61 0.88
1500 x 1350mm 1350 x 1200mm 1.62 0.44 0.72 0.61 0.99
1500 x 1500mm 1350 x 1350mm 1.82 0.45 0.83 0.60 1.09
* Not suitable for Stairwell use without Wind Deflectors because does not achieve an Aerodynamic Free Area of more than 0.70 Aa m2 in a stairwell as per the requirement of EN 12101-2, not the grey area "free vent area" that is often quoted. Abbreviations: Aa = Aerodynamic Free Area, Cv = Coefficient flow Mardome Trade Electronically Operated Smoke Vent Rooflights are individual polycarbonate domes intended for easy installation on flat roofs of all modern building types to provide natural smoke and heat exhaust, as well as comfort ventilation.