A good night’s sleep can be achieved in even the busiest urban environment with a new tricklevent from leader in natural ventilation solutions, Passivent Ltd.

Passivent’s Acoustic Overglass Vent Bar is easily installed above the glass in sealed double glazed units, and is thermally broken eliminating risk of cold bridging. Installed, the vent can reduce road noise penetration to an indoor ambient noise level of just 35dB, and still achieve up to 8000mm2 free ventilation area, ensuring compliance with Building Regulations, PPG24 Planning & Noise: 1994 and BS8233: sound insulation and noise reduction for buildings: 1999.

The concept for the Acoustic Overglass Vent Bar evolved in direct response to a customer’s problem: an international hotel chain was finding guests at its Finchley Road, Camden, London, venue were complaining of nuisance noise at night time on the front facade, across the five storeys of the hotel, from the busy road and junction outside, with measured external noise levels reaching up to 73.9dB*. The originally installed overglass vent bars fitted to the 820mm wide acoustic glazing were not providing the target internal noise level of 35dB, and management wanted to address this, but still ensure more than adequate background ventilation into the bedrooms.

Stephen Smith, Passivent Domestic Product Manager, observed, “Tests done in situ showed that the Passivent Acoustic Overglass Vent Bar provided the required level of noise reduction across the night time period achieving an internal maximum noise level of 35dB. This was also backed up by further independepent laboratory testing which reinforced the site testing. The unit achieved a Dnew (C;Ctr) of 38dB (0-1).”

Manufactured from extruded aluminium, the Vent is available in white internal and black external faces as standard, although RAL colour to special order is available, volume permitting.

Passivent’s Acoustic Overglass Vent Bar is the latest addition to the company’s comprehensive range of background ventilation solutions, which encompasses tricklevents, window and through-wall ventilators, plus natural and mechanical ventilation, with and without heat recovery. Passivent is part of the Building Product Design Group which incorporates Glidevale (roofing and ventilation), Z-Led (damp-proofing solutions), and Kingfisher Louvre Systems (ventilation and solar shading louvre systems), all of which aim to bring to market innovative yet practical products in line with changing requirements.

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