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Indoor house ventilation

The importance of indoor air quality is becoming increasingly recognised as buildings are built to be more airtight and more energy efficient. Achieving stringent standards set out in Part L means high building fabric standards resulting in a significant reduction in heat loss and fewer gaps for air to escape. Controlled ventilation is therefore essential to remove water vapour and pollutants, and to provide fresh air to the home.

Our collection includes

Duracowl wall cowl

Fresh wall ventilators

Glidevale trickle ventilators (Tricklevents)

Intelligent passive stack ventilation (iPSV)

Glidevale Protect is a division of Building Product Design Ltd.

Other subsidiaries include ventilation systems specialist Passivent and Kingfisher Louvres, manufacturer of aluminium louvres 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

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