Want that slim, black, steel crittal door look? But you dont want the condensation and cold frames that comes with Crittal? The Aperture Heritage range is a high performance, aluminium, thermally broken door and matching window system. It offers great value for money as a slim frame alternative to actual steel crittal systems for external doors. But it is a thermally efficient system, designed to keep the cold out and the heat in. As standard it comes with high security multipoint key locking. This system can also be upgraded to PAS24 security.