10 Yr Warranty

AOV Smoke Vent - Triple Glazed Dome Certified to EN 121101-2

  • From £1,344.00 (ex. VAT)
Item in Stock | Free Next Working Day Delivery (Mon-Fri)
Want it by Wednesday 27th February? Order within 3 hours, 10 minutes and choose FREE UK Next Working Day Delivery (Mon-Fri) at checkout.
Free Delivery to Most UK Postcodes excludes stira ladders

Our AOV smoke vents are designed to automatically extract smoke in the event of a fire. Our AOVs are fully tested and certified in accordance with BS EN 12101-2, meeting standards for safety, security, non-fragility and fire safety with the full guarantee of an established, accredited UK manufacturer.

Fully certified to approved document B section

All the sizes offered 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.

Certification and Regulatory Information

  • Fire rating - achieves Class B-s1, d0 to BS EN 13501:Part 1 and deemed BROOF(t4) to BS EN 13501: Part 5 by Building Regulation
  • Inclusive of wind deflectors where applicable to comply with the regs
  • Complete with a Part "L" compliant polycarbonate triple skin for a high thermal performance & resistance to condensation
  • Safety - achieving Class B non fragility to ACR[M]001
  • The polycarbonate skin lid with an impact resistance to EN1873 1200 joules and Class B non-fragility in accordance with ACR[M]001
  • Opens to 160° in less than 60 seconds complying  the requirements of the new Smoke Vent Standard BS EN12101-2

Operation and Options

  • Optional control panels, smoke detectors, fireman’s switches and manual control points available
  • Control panel can be activated from: Manual override switches, by dedicated smoke detectors or through integration with existing smoke detection and or fire alarm systems
  • Can be integrated into any building management system
  • Features back up battery to ensure operation in the event of no mains power

General Information

  • Suitable for residential and commercial buildings
  • Thermally broken kerb
  • Extremely secure with concealed individual fixings within security caps
  • Hinged long side (where applicable)
  • 10 year guarantee
  • CE Marked
  • Weatherproofed to the full height of the upstand
  • Designed to last in excess of 20 years under normal conditions
Aerodynamic free area - AOV Smoke Vents(Aa)Aa
Smoke Vent Size
(Note: Rectangular
Sizes are Hinged
on the Long Side)

Daylight free area*

Roof opening

Standard (no
Wind deflectors)
Wind deflectors
Free Area

CvAa m2CvAa m2
1200 x 1050mm1050 x 900mm1.260.420.53*0.630.790.88
1350 x 1050mm1200 x 900mm1.420.400.57*0.640.900.99
1500 x 1050mm1350 x 900mm1.580.390.61*0.641.011.12
1200 x 1200mm1050 x 1050mm1.440.440.63*0.620.901.01
1350 x 1200mm1200 x 1050mm1.620.420.68*0.631.021.16
1500 x 1200mm1350 x 1050mm1.800.400.720.641.151.32
1350 x 1350mm1200 x 1200mm1.820.430.780.631.141.34
1500 x 1350mm1350 x 1200mm2.030.410.830.641.291.52
1500 x 1500mm1350 x 1350mm2.250.420.950.631.421.72

* 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.

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Free Next Working Day Delivery

Applies to the vast majority of our customers and all but one of our products (more information on this later).

The lead times and delivery service are clearly displayed against each product, just below the price.

Please note, for certain products and delivery zones we can offer AM deliveries and Saturday Deliveries, if available, you'll be able to select and pay for these options via the checkout.

Delivery Charges will be applied for the following reasons:

You're outside of UK Zones A&B (Certain parts of Scotland, Scottish Islands, Northern Ireland, Channel Islands and IOM)
To view our delivery zones please View our delivery zones

We're unable to offer the following product/s with Free delivery:
Stira Loft Hatch/ Ladder combined


You can return a product within 14 days of receipt. Please note Made to measure products cannot be returned

To download our returns form please click this link