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For complete flexibility, it can be accommodated into any application with overhead glazing, both single and double glazed. The vent attains the best achievable results when independently tested (Wintech) for air permeability, water tightness and wind resistance.

With a five-year warranty, the new vent system comprises electrically operated opening ventilators connected to an open/close switch or digital control panel with rain sensor and thermostat. The vent can be managed using a manual worm gear & operating pole.

Manufactured to British Standards using extruded aluminium alloy, the vent is supplied in mill finish and can be anodized or powder coated in a wide range of colours. Satin Hipca White (RAL 9910 Satin), Anthracite Grey (RAL 7016 Matt) and dual colour – Grey external/White internal, are available as standard. To complement the vent system, the patent glazing bars can be mill finished and anodized. Ancillary components are provided from preformed aluminium alloy.

EDPM glazing seals offer excellent long-term performance. Howells’ recommends a minimum roof pitch of 10 degrees. Lower pitches can be achieved but are reliant on perishable silicone seals.

Going to FIT Show 2019? Visit Howells on stand (D18) to discover an array of roof lights, including an exciting new addition to the range, and understand how its customers benefit from over 40 years’ experience in patent glazing.