How air curtains work?
usually the air entering through the inlet grille, sometimes with filter functions, is compressed by internal fans and strained thought an air outlet, which is directed at the open doorway.
The filter protects the interior components (heat exchanger, fans, electronics, etc.) from dust and particles.
The fans of the air curtain can be direct or belt driven. The most frequently used types are centrifugal, axial and cross-flow.
Some air outlets and/or lamellas can be adjustable to increase the performance of the air curtain according to each situation.