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AOV Smoke Vents

Automatic Opening Vents (AOVs) are electrically operated smoke vent rooflights





AOV Smoke Vent [Central Actuator]

AOV Smoke Vent [Central Actuator]

AOV Smoke Vent comprising PVC kerb with a polycarbonate dome.

AOV smoke vents with central acuators combine smoke ventilation with access (access with larger models only) and are designed to automatically extract smoke in the event of a fire. They are typically sited on flat roofs above corridoors and stairwells and have vents that open to an angle of 140 degrees in less than 60 seconds.

The range is fully tested and certified in accordance with BS EN 12101-2. Covering 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.



Specifications

Standard Actuator positioning is as shown above (central to the hinge).

AOVs can be fitted on flat roofs with a pitch of up to 15°. The hinge side needs to be facing up the slope, please ensure you take this into consideration.

Aerodynamic free area - AOV Smoke Vents with 365mm PVC Kerb - (Aa)Aa

Smoke Vent Size (mm) Note: Rectangular Sizes are Hinged on the Long Side Daylight free area size*(mm) Roof opening area (m2) Approx. Clear opening size (mm) Aerodynamic free area Free Area (m2)
Cv Aa m2
1050 x 1050 900 x 900 1.10 900 x 650 0.44 0.49* 0.72
1200 x 1050 1050 x 900 1.26 1050 x 675 0.42 0.53* 0.88
1200 x 1200 1050 x 1050 1.44 1050 x 750 0.44 0.63* 1.01
1350 x 1050 1200 x 900 1.42 1200 x 600 0.40 0.57* 0.99
1350 x 1200 1200 x 1050 1.62 1200 x 675 0.42 0.68* 1.16
1350 x 1350 1200 x 1200 1.82 1200 x 750 0.43 0.78 1.34
1500 x 1050 1350 x 900 1.58 1350 x 525 0.39 0.61* 1.12
1500 x 1200 1350 x 1050 1.80 1350 x 600 0.40 0.72 1.32
1500 x 1350 1350 x 1200 2.03 1350 x 675 0.41 0.83 1.52
1500 x 1500 1350 x 1350 2.25 1350 x 750 0.42 0.95 1.72
1650 x 1050 1500 x 900 1.73 1500 x 450 0.37 0.64* 1.26
1650 x 1200 1500 x 1050 1.98 1500 x 525 0.38 0.75 1.48
1650 x 1350 1500 x 1200 2.23 1500 x 600 0.39 0.87 1.70
1650 x 1500 1500 x 1350 2.48 1500 x 675 0.37 0.92 1.92
1650 x 1650 1500 x 1500 2.72 1500 x 750 0.42 1.14 2.14


Free Area explanation for AOV Smoke Vent with PVC kerb

The size of the vent (at the smallest point) minus the area of any obstructions such as motors, ladders or grilles - how well air travels through a vent for natural ventilation:


Coefficient of Discharge (Cv) - a value to quantify the efficiency of a smoke vent. This is calculated by a third party.

Aerodynamic Free Area

The Smoke vent size a multiplied by the Coefficient of Discharge - overall performance of the vent. This is the most important, as it is the most accurate way to quantify the performance of the smoke vent. It is used in EN12101-2, BSI & UKCA certification and also stated on NBS specs.

Aerodynamic free area - AOV Smoke Vents with DF Kerb - (Aa)Aa

Smoke Vent Size (mm) Note: Rectangular Sizes are Hinged on the Long Side Daylight free area* Size (mm) Approx. Clear opening size (mm) Roof opening area (m2) Aerodynamic free area Free Area (m2)
Cv Aa m2
1050 x 1050mm 900 x 900mm 900 x 650 0.81 0.48 0.39* 0.72
1200 x 1050mm 1050 x 900mm 1050 x 675 0.95 0.46 0.43* 0.88
1200 x 1200mm 1050 x 1050mm 1050 x 750 1.10 0.47 0.52* 1.01
1350 x 1050mm 1200 x 900mm 1200 x 600 1.08 0.44 0.48* 0.99
1350 x 1200mm 1200 x 1050mm 1200 x 675 1.26 0.45 0.57* 1.16
1350 x 1350mm 1200 x 1200mm 1200 x 750 1.44 0.40 0.67* 1.34
1500 x 1050mm 1350 x 900mm 1350 x 525 1.22 0.42 0.51* 1.12
1500 x 1200mm 1350 x 1050mm 1350 x 600 1.42 0.43 0.61 1.32
1500 x 1350mm 1350 x 1200mm 1350 x 675 1.62 0.44 0.72 1.52
1500 x 1500mm 1350 x 1350mm 1350 x 750 1.82 0.45 0.83 1.72
1650 x 1050mm 1500 x 900mm 1500 x 450 1.35 0.40 0.54* 1.26
1650 x 1200mm 1500 x 1050mm 1650 x 1200 1.58 0.41 0.65* 1.48
1650 x 1350mm 1500 x 1200mm 1650 x 1350 1.80 0.42 0.76 1.70
1650 x 1500mm 1500 x 1350mm 1500 x 675 2.03 0.38 0.76 1.92
1650 x 1650mm 1500 x 1500mm 1500 x 750 2.25 0.44 0.99 2.14

* Not suitable for Stairwell use 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.

Free Area explanation for AOV Smoke Vent with DF Kerb (being fitted to existing upstand)

The size of the vent (at the smallest point) minus the area of any obstructions such as motors, ladders or grilles - how well air travels through a vent for natural ventilation:



Coefficient of Discharge (Cv) - a value to quantify the efficiency of a smoke vent. This is calculated by a third party.

Aerodynamic Free Area

The Smoke vent size less 150mm on each dimension, multiplied by the Coefficient of Discharge - overall performance of the vent. This is the most important, as it is the most accurate way to quantify the performance of the smoke vent. It is used in EN12101-2, BSI & UKCA certification and also stated on NBS specs.

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.

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
72 hour battery back up in the event of power cut
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 140℃ in less than 60 seconds complying the requirements of the new Smoke Vent Standard BS EN12101-3

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Installation Guide

Thermal and Acoustic data

Glazing U-Value DF Kerb U-Value 365mm PVC Kerb Acoustic Airborne Sound Index
Double 2.0 - 2.4W/m²K 1.6 - 2.1 W/m²K 20dB
Triple 1.5 - 1.7 W/m²K 1.2 - 1.5 W/m²K 22dB


General Information

Suitable for residential and commercial buildings
Thermally broken kerb (PVC)
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

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

Control Panel

It is recommended that Mardome Smoke Vents are connected to the Smoke Vent control panel available from us. The control panel is designed to be used with the actuator of the Mardome Smoke Vent and provides a battery backup and additional line monitoring functionality. A Mardome Smoke Vent can be installed alongside other EN12101-10 compliant control systems but we cannot provide technical support concerning the control of the product and do not keep a list of compatible control systems. Installing with an alternative EN12101-10 control system will not affect the guarantee of the product. View control panel information here.

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