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
Operation and Options
|Smoke Vent Size|
Sizes are Hinged
on the Long Side)
|Daylight free area*|
|Roof opening |
|Standard (no |
|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|
* 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.
|Technical Drawing||Click to View / Download Technical Drawing|
|Datasheet||Click to View / Download Datasheet|
|Installation Guide||Click to View / Download Installation Guide|
|Safety, Handling and Maintenance Data||Click to View / Download COSHH and Maintenance Data|
|10 Year Guarantee||Click to View / Download Guarantee|
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