Since 2012 „TANGRA” produce air curtains for revolving doors of trade centers, shops, sport halls, hotels and administrative buildings.
These products are used to create a thermal barrier at the entrance of buildings and preserves the heat losses and comfort. Along with the measures for energy efficiency, air curtains reduce energy losses of the project.
Air curtains for revolving doors are produced by only a few companies worldwide, due to the need specific production equipment and specialized R&D. One of them is TANGRA Bulgaria.