We specialize in the application of room ventilator systems or industrial heat-recovery systems, especially for communications. High tightness and strength of our products thanks to the double folding of the intake-flow edges (fivefold material thickness). Double embossed made heat transfer is improved by the surface creating turbulence, to gain higher efficiency and less resistance of flow. Special coating on Aluminium is used to resist erosion. The heat exchangers consist of ...