Architectural aluminium systems supplier Kawneer has further enhanced its AA540 window range - which it says combines value for money with a BRE Green Guide A-rated frame – with a high-performance swing door.<br> <br> The AA545 door uses the same multi-chamber thermal break core as the AA541 casement, AA542 pivot and AA543 tilturn windows in the range. Kawneer explains that the technology, along with the addition of a thermally enhanced centre seal, ensures thermal efficiency (U values down to 1.29 using 0.6 glazing) and full compliance with Part L.<br> <br> Designed for direct fix into prepared openings and within ribbon windows, the door suites with Kawneer's AA540 window range, AA100 and AA110 curtain walling, 451PT framing and door systems, to give specifiers and architects more flexibility for new build and refurbishment projects in low and high rise applications where cost is a key driver, Kawneer explains.<br> <br> <a href="http://www.kawneer.co.uk">www.kawneer.co.uk</a>