10 Yr Warranty

Flat Roof Smoke Vent - AOV

  • From £1.00 (ex. VAT)
Item out of Stock | Free Next Working Day Delivery (Mon-Fri)
Free Delivery to Most UK Postcodes excludes stira ladders

Our AOV smoke vents are designed, fully tested and certified in accordance with 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

Inclusive of wind deflectors where applicable to comply with the regs

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

Complete with a Part "L" compliant polycarbonate triple skin for a high thermal performance & resistance to condensation

Thermally broken kerb

Safety - achieving Class B non fragility to ACR[M]001

Extremely secure with concealed individual fixings within security caps

Optional control panels, smoke detectors, fireman’s switches and manual control points available

The polycarbonate skin lid with an impact resistance to EN1873 1200 joules and Class B non-fragility in accordance with ACR[M]001

The lid opens to 160° in less than 60 seconds complying  the requirements of the new Smoke Vent Standard BS EN12101-2

Hinged long side (where applicable)

10 year guarantee

Aerodynamic free area - AOV Lobby(Aa)Aa
Smoke Vent SizeDaylight free area*
Roof opening
Standard (no
Wind deflectors)
Wind deflectors
Free Area
CvAa m2CvAa m2
1050 x 1200mm900 x 1050mm1.260.420.53#0.630.790.88
1050 x 1350mm900 x 1200mm1.420.400.57#0.640.900.99
1050 x 1500mm900 x 1350mm1.580.390.61#0.641.011.12
1200 x 1200mm1050 x 1050mm1.440.440.63#0.620.901.01
1200 x 1350mm1050 x 1200mm1.620.420.68#0.631.021.16
1200 x 1500mm1050 x 1350mm1.800.400.720.641.151.32
1350 x 1350mm1200 x 1200mm1.820.430.780.631.141.34
1350 x 1500mm1200 x 1350mm2.030.410.830.641.291.52
1500 x 1500mm1350 x 1350mm2.250.420.950.631.421.72

# Not suitable for Stairwell use as does not exceed without Wind Deflectors


Aa = Aerodynamic free area Cv = Flow capacity

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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Our terms & conditions appear when placing an order, please ensure you read before completing the purchase.
After placing an order, you will receive an automated email acknowledgement that your order has been received.
Please note, check your goods on receipt to ensure they have arrived in good condition. Claims for damaged goods are not covered by our carrier's insurance if the delivery is unchecked.
Our carrier has a 98.7% on time delivery record, therefore please note as we cannot 100% guarantee a delivery time, we will not be held responsible for any losses incurred due to late delivery.
If you wish to return a standard stock order, simply complete a returns form (click here to download a returns form and instructions) send back to us in perfect condition, including packaging, 100% complete, not part used and we will give a full refund back onto the payment card, once the package has been returned and checked. Alternatively we can quote for collection of the order and deduct the cost from the refund.
With the exception of the Highlands, all our deliveries to the UK mainland are free of charge. Our extra over charges apply as follows:
Region    Weekday    Weekday AM    Sat AM    Delivery Time
UK Mainland    Free    £10.00    £35.00    3 Days
Scottish Highlands    £15.00    n/a    n/a    3 Days
Northern Ireland    £25.00    n/a    n/a    3 Days
Republic of Ireland 3 Days


For our full policy please click here