The bevelled shape of the minimal metal profiles of the window and door frame are reminiscent of the old wooden windows .
BV 75 has been designed to create thermal break metal doors and windows that resemble the typical shape of antique wooden frames with its profiles. The external profile of the sash and the internal profile of the glazing bead have the same bevelled angle, creating perfect symmetry between the inside and outside and positioning the glass on axis with respect to the section of the window. The slim profiles of the BV 75 system, with minimal visible sections, dematerialise the walls and allow great freedom in the design of the window and door frame: from just 27 mm to 47 mm for the side node, 62 mm for the central node and a depth of 77 mm. Door and frame are overlapping both inside and outside. Sealing of the windows and doors is guaranteed by a double seal system for outward opening and an open joint system with three levels of sealing for inward opening. The high thermal and acoustic insulation performance of the BV 75 thermal break system has been tested by the best European certification laboratories according to EN 14351-1 reference standards.