As a response to ever growing demand for building products featuring high insulation performance there have been designed door and window systems with a thermal barrier MB-70HI, MB-70US HI and a curtain wall based on the MB-70CW HI windows. Their construction is based on well-proven, well developed and highly appreciated base systems, i.e. MB-70, MB-70US i MB-70CW.
The thermal insulation performance of frames of this system is considerably higher than the insulation performance of base systems. The value of heat transfer coefficient Uf for constructions of the MB-70HI system – depending on the applied profiles and accessories – ranges between 1.0 and 2.3 W/(m2K).
Enhanced thermal insulation performance is achieved due to placing special insulating inserts in the central insulating chamber, formed by connecting aluminium profiles with thermal breaks. Thus formed inserts reduce heat transfer through this chamber due to low value of heat transfer coefficient. The central location of inserts additionally limits convection and thermal radiation.
The MB-70HI doors and windows, just like in the case of the base system, find application both in individual assemblies and in aluminium façades. If used as a filling of a mullion / transom wall, it would be best to combine such doors and windows with the system featuring enhanced insulation performance, i.e. MB-SR50N HI+.