Automatic, humidity-sensitive wall ventilators from Glidevale ..

wall ventilator

The Fresh 99H humidity-sensitive, through wall ventilator is designed to introduce fresh air into properties. It opens and closes automatically depending on relative humidity (RH), reducing the potential for harmful condensation and heat loss. With an operating range of 35-75% RH, the vent includes a trickle facility even when ‘closed’ to ensure the constant ingress of fresh air. Being non-electrical it requires no energy to operate. It is easy to fit and virtually maintenance free.

An acoustic humidity-sensitive option, the Fresh 99HdB, provides sound reduction up to 40dB Dn,e,w and is suitable for use where there are high levels of external noise such as near main roads, airports or railway lines.

Both products offer improved ventilation equivalent areas compared to previous models.

About Glidevale

Glidevale is one of the most experienced building products companies in the market today, offering a wide range of ventilation, cavity tray, gas protection and building accessory solutions. A pioneer in roof space ventilation, the Glidevale name is recognised for providing innovative yet practical solutions to suit ever changing construction techniques and practices. Its ventilation range is one of the most comprehensive available in the UK and Ireland including eaves, slate, tile and ridge solutions.

Glidevale holds a competitive position in loft access traps, providing a comprehensive range products with insulation, fire protection and security options. The company offers underfloor and cavity wall ventilation as well as a range of cavity trays and gas protection solutions.

Its intelligent passive stack ventilation system requires minimal maintenance and operates silently 24 hours a day, without user intervention.

For more information about Glideval Wall Ventilators, contact 0161 905 5700, email or visit



Share this article