Architectural aluminium systems supplier Kawneer has launched a new thermal enhancement of its AA 600TE series of windows and doors. The new AA 601TEPlus casement window and AA 605TEPlus swing door, both outperform the stringent thermal demands outlined inPart L. The enhancements have allowed a choice of thermal performance to suit the desired specification. <br> <br> The achievement in the AA 601TEPlus top-and side-hung casement window comes from the addition of two new vent profiles featuring the convection fins already found in the frame and from EPDM “heat shields” in the hardware cavity. The same convection fin technology has also been applied to a new curtain wall adaptor profile. <br> <br> These measures have taken the U-value of the AA 601TEPlus casement window down to 1.5. <br> <br> The same level of improvement has been achieved with the AA 605TEPlus swing door with the introduction of a new thermally broken low threshold, EPDM threshold gasket and a glazing capability of up to 51mm to accommodate triple glazing. The U-value of the AA 605TEPlus swing door has been taken down to a potential 1.4.<br> <br>