Air displacement vent units types QSH and ISH are mainly used in industrial areas with heights of 3.5 to 10 m, installation can be freely suspended or fixed to columns or walls. In rooms or halls with changing thermal loads the supply air temperature can provide either heating or cooling functions and the air itself can be discharged horizontally or vertically.

Air polluting work processes suggest the use of the type QSH since in the cooling mode it provides a bell-shaped low turbulence air distribution.