The window system open outside with the thermal chamber MB-70(HI) Casement is the part of system MB-70 and is designed to perform the elements of architectural exterior building, eg. different types of fixed windows, open outside, vestibules, sites and spatial structures which features good thermal and accoustic insulation, water and airproof. The system complies with energy saving and environmental protection norms. The parameters of windows made of elements of the system MB-70(HI) Casement complies with requirements and norms.