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All windows fitted from March 2002, including private domestic replacements, have to meet the requirements of Part L with regards the u-value and Part F provision of background ventilation Permanent vents for fitting under a drip rail. Tough Polypropylene construction. 225mm size fits a 210x13mm slot, and the 400mm size fits a 354x13mm slot.
•Ventilators are infinitely controllable •Optimum available air opening position for each design •Products are suitable for timber, aluminium, PVCu or composite windows •Ideal for night ventilation without compromising security •All products tested in accordance with relevant British Standards and many tested acoustically
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