Verified by manufacturer 1 month ago
A range of roof mounted natural ventilation terminals.
Used for passive stack ventilation applications in conjunction with Passivent Aircool facade ventilators. They can ventilate deep plan spaces and provide night cooling. Can also be used for multiple extract applications and mechanical extract outlets.
A range of roof mounted natural ventilation terminals which combine low airflow resistance with excellent weatherability. They can be used as part of a sustainable, low energy natural ventilation strategy to provide an exhaust only outlet for used air. Also available with iAT - intelligent airflow technology for still, windless days, and unusual events such as high occupancy levels or unusual heat gains.
Features and benefits:
Coefficients of discharge:
Based on double-bank louvres with base
dampers - Airstract square/rectangular 0.57, Airstract circular 0.54.
Wind resistance:
Resistant to continuous wind loads at 51 m/s, demonstrated by independent BRE tests.
Airtightness:
Approx 9.7 m3/hr/ m2 at 50 Pa.
Weather resistance:
External louvres have been independently tested at BSRIA to BS EN 13030: 2001 ‘Performance testing of louvres subjected to simulated rain’.
Acoustic performance:
Air intakes sited at roof level generally allow in less noise. Acoustic treatment can be applied to Airstract and systems to deliver planned acoustic attenuation performance, based on independent testing by The University of Salford.
Available in square or circular designs.
Free Area (without base louvre):
Free Area (with base louvre):
Bespoke Airstract terminals can also be manufactured in aluminium. These provide even greater airflow performance whilst still featuring the patented double-bank louvres for maximum weather protection. A wide range of larger sizes available too. Enquire for more details.
Shape | Square Circle |
Color | Manufacturer guidanceA range of RAL and BS colours. Consult manufacturer. |
Finish | Polymer Guidance for specification option: ABS. Polyester powder coated Guidance for specification option: Aluminium. |
Material | ABS Guidance for specification option: Acrylonitrile butadiene styrene. Aluminium |
Size | 575 x 575 mm 575 x 800 mm 575 x 1025 mm 575 x 1250 mm 800 x 800 mm |
Uniclass | |
CAWS | J31/60 Roof ventilators J31/360 Roof ventilators |
System performance | Natural ventilation design. |
Ventilation inlet openings | Dampers and louvres. |
Actuators | Damper actuators. |
Exhaust path | Pre-insulated ductwork and fittings. |
Ventilation outlet openings | Roof stack air terminals. |
Accessories | Not required.Acoustic lining. |
Controls | Natural ventilation control systems. |
Ventilation opening control | Sensor-controlled. |
Execution | Installing natural ventilation systems. |
System completion | Commissioning of air distribution systems. |
Contains Red List materials | No |
Country of product manufacture | United Kingdom |
Platform | Compatible | Version |
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