Skip to content

This is where the air is brought in and extracted through the same façade. A ‘passive’ single-sided strategy is mainly driven by wind pressure, usually through large façade opening devices. As penetration depths are less than 2 ½ times the floor to ceiling height this strategy is more suited to lower occupancy rooms and not higher occupancy rooms such as teaching spaces and seminar rooms.

In contrast a single-sided strategy using a ‘hybrid’ system (part natural, part mechanical) is more suitable for teaching spaces or seminar rooms.  This kind of system will achieve greater penetration depths and higher airflow rates and will also temper incoming air or provide space heating in winter, as well as boosting airflow during the warmer summer months.

Designing natural ventilation systems to be as efficient and effective as possible requires specialised expertise and support at the early concept and design stage.  Get in touch with us today:

Talk to us

Contact us today to discover more about our extensive range of natural and hybrid ventilation products and the technical support services we can offer.

Get in touch

Passivent is a division of Building Product Design Ltd.

Other subsidiaries include Glidevale Protect, a specialist in ventilation solutions, condensation control and energy efficiency across the built environment and Kingfisher Louvres, manufacturer of aluminium louvre systems.

Important Notice

Please be vigilant of fraud/cyber crime. If you receive an email from our parent company Building Product Design Ltd, please check that the email address from the sender ends in '' and any phone number given is 0161 905 5700.

If you receive any emails ending in '' or '', these are NOT legitimate, and you should contact us as soon as possible at

Site by Harris