These vents can be screwed or clipped to the window
The internal part can be opened to provide air flow upwards or downwards
Internal vent size H 18.5mm L 455mm D15mm
External vent size H 18.5mm L 455mm D25mm
Outside Hole Centres Is 435mm with one centre hole
• Equivalent Area: 5000mm2 EQA
• Free Area: 5049mm2
• Acoustic D n,e,w (+/-) - vent open: 35(0;1)
• Acoustic D n,e,w (+/-) - vent closed: 43 (0;0)
• Air Leakage: 1.29 m3/h 0.36 L/s
• Water tightness Test to BS EN 13141-1: Resistant to
water penetration using method 1A meeting Class
9A requirement up to and at 600pa in BS EN 12208
• DB Rating: Airborne sound insulation to
BS EN ISO 10140-1:2016 Annex E and
BS EN ISO 10140-2:2010 and single number
calculated in accordance with BS EN ISO 717-1:2013