MB-70US with hidden sill belogs to the MB-70 thermal break category.

Esthetically the construction is identical to MB-60 US but with increased thermal insulation coefficient, compliant with thermal requirements for type 1 materials from DIN 4108.

MB-70 US windows have hidden sash on the outside. They look the same regardless if they are fixed or opening and the narrow frames gives the impression of a light construction.

MB-70 US provides efficient water removal and a ventilation system for the glass chamber and the frame-sill chamber. Outside ventilation and drainage openings are hidden from view with synthetic covers.

MB-70 US window is very similar to the other MB systems. Using this solution one can adapt various other common elements (rods, seals, fittings).