Natural ventilation with enhanced thermal efficiency

Passivent, the natural ventilation specialist, has improved the performance of its Aircool® ventilators. As a result of recent product improvements, thermal performance has increased by 22 per cent, giving specifiers greater flexibility to meet the energy efficiency demands of a building. Achieving U-values as low as 0.86W/m2K, the ventilator offers excellent performance when closed.

The range of controllable insulated ventilators has been designed for use in external facades, including all forms of wall construction, curtain walling and window profiles. The ventilator includes integral electrically actuated, modulating dampers which control the air intake and extract. Being low voltage, the dampers are energy efficient and they are also virtually silent in operation. The Aircool’s thermally broken frame design minimises the risk of condensation. Weather protection and security are provided by the external weather louvre, even when the internal insulated louvre is open. The ventilators can also be supplied in modular form for maximum flexibility; acoustic and thermal options are also available.

Passivent’s Design Manager James Hammick said:

“The thermal upgrade makes Aircool one of the best in its class. It’s the ideal partner for BREEAM projects,”

“With wall sleeves and external weather louvres provided as standard, it’s also straightforward to contractors to install,” he continued.

The ventilator can be used across a range of markets including education and commercial. As well as being suitable for daytime cooling, it can also be used for night cooling to reduce the risk of overheating. Being fully automatic, there is no risk of the Aircool overcooling.

Passivent offers a comprehensive technical design service including assistance with product selection, system design and early stage thermal modelling.

For more information, contact 01732 850 770, email projects(Replace this parenthesis with the @ sign) or visit