Manual Roof Vent. New and improved vent, tested for weathertightness at Wintech: This achieved "Best achievable results".
Windows & Doors, Air Permeability test method BS EN 1026:2016
Windows & Doors, Air Permeability classification BS EN 12207:2016
Windows & Doors, Watertightness test method BS EN 1027:2016
Windows & Doors, Watertightness classification BS EN 12208:2000
Windows & Doors, Wind Resistance test method BS EN 12211:2016
Windows & Doors, Wind Resistance classification BS EN 12210:2016
Performance of Windows & Doors, classification and guidance for Weather Tightness BS 6375-1:2015+A1:2016
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