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.
Resistant to continuous wind loads at 51m/s, demonstrated by independent BRE tests.
Approx 9.7m3/hr/m2 at 50 Pa.
External louvres have been independently tested at BSRIA to BS EN 13030: 2001 ‘Performance testing of louvres subjected to simulated rain’.
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.
A range of RAL and BS colours. Consult manufacturer.
Polyester powder coated
Acrylonitrile butadiene styrene (ABS)
575 x 575 mm
575 x 800 mm
575 x 1025 mm
575 x 1250 mm
800 x 800 mm
800 x 1025 mm
800 x 1250 mm
1025 x 1025 mm
1025 x 1250 mm
1250 x 1250 mm
Natural ventilation design.
Ventilation inlet openings
Dampers and louvres.
Pre-insulated ductwork and fittings.
Ventilation outlet openings
Roof stack air terminals.
Natural ventilation control systems.
Ventilation opening control
Installing natural ventilation systems.
Commissioning of air distribution systems.
To BS 476-3, AA.
Contains Red List materials
Country of product manufacture
Passivent Airscoop Roof Ventilation Terminal
Passivent Hybrid Plus Airstract Roof Ventilation Terminal
Passivent Hybrid Plus2 Aircool Ventilators - Wall & Window versions
Passivent Wall Aircool Ventilator - Standard/Thermal/Acoustic versions
Passivent Window Aircool Ventilator - Standard/Thermal/Acoustic versions