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.
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.
Please note, as this is a bespoke assembled product and therefore returns are not accepted. Please ensure that you order the correct size.
Certification and Regulatory Information
Operation and Options
|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|
|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.
|Technical Drawing||Click to View / Download Technical Drawing|
|Datasheet||Click to View / Download Datasheet|
|Installation Guide||Click to View / Download Installation Guide|
|Wiring diagram||Click to view / Download Wiring Diagram|
|Safety, Handling and Maintenance Data||Click to View / Download COSHH and Maintenance Data|
|10 Year Guarantee||Click to View / Download Guarantee|
The lead times and delivery service are clearly displayed against each product, just below the price.
We will continue to send items on a Next working day delivery, but please accept delivery might take longer, this is out of our control.
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 deliveries to geographical areas represented as Zones C, D and E:
This includes certain parts of Scotland, Scottish Islands, Northern Ireland, Channel Islands and IOM)
You can return a standard product (most access panels and loft hatches) within 14 days of receipt. Roof domes, Roof Lights, Roof Hatches and AOV Smoke Vents will be subject to a collection restocking fee.
Please note Made to measure products cannot be returned.
Click here to download a return form.
Our couriers have had to make some changes in order to protect you, and their staff, while also dealing with exceptionally high demand. As a result the following changes apply:
Parcelforce Worldwide Update - Coronavirus (COVID-19) Public Health England (PHE) has advised that people receiving parcels are not at risk of contracting the coronavirus (COVID-19). From experience with other coronaviruses, we know that these types of viruses don’t survive long on objects, such as letters or parcels. This complements the highly publicised guidance from PHE for people to wash their hands more often than usual using soap and hot water.
In order to protect both our people and customers as much as possible, we will not be handing over our hand-held devices to customers to capture electronic signatures. Our drivers will instead log the first and last name of the person accepting the item and we will record the geolocation of the delivery. This will apply to all deliveries that normally require a signature.
If recipients are unable to come to the door or are self-isolating, we will post a customer contact card in the normal way, advising of other ways the recipient can arrange to get their item. For example, by getting a friend or family member (who is not resident with someone who is self-isolating) to collect the parcel from their local Parcelforce depot or Post Office branch, as specified on the card. They will need to bring along the card we left and a form of ID in the name of the person the item is addressed to. Examples of suitable ID are specified on the card.
Due to the current situation, there are significant impacts on our ability to maintain all our usual service levels. We will continue offering our services, receiving and delivering parcels for our customers but there may be disruptions to some services under current conditions. As a result, we will be suspending service guarantees from 18 March 2020 but will seek to ensure ‘all reasonable endeavours’ to maintain service levels where we can.