Exterior doors PE78N/PE78NHI are characterised by a specially designed three-chamber system. The system is thermally insulated to preserve heat in the room. The profile structure is co-planar and the rebate recess is 18 mm. The glazing beads for the groove are Euro-standard and the thermal breaks are 34 mm wide. The door can be easily connected to the shopfront using specially designed profiles. The door leaves are flush with the frame. Large structures can also be produced. There are many corner connections and a great deal of flexibility in the choice of fittings. Different thermal insulation variants are available, depending on the insulation inserts used: PE78N+, PE78NHI, PE78NHI+.