The heating principle:
The air volume (VO) at an exhaust temperature of, for instance, +38°C (tA), will from the start induce (attract) ambient air on both sides of the air stream, depending on the mixing factor (m). Near a doorway these would be proportions of both outside and inside air. This physical phenomenon causes the initial volume of air to grow as the body of air is expelled in a stream. During this process the initial velocity and temperature both decrease.
In our air curtain installations the initial parameters are calculated that a final air velocity of approx. 1,5 m/s - 2 m/s or more exists at the end, while a room temperature of some +20°C is also maintained. Only in this way can effective functioning be achieved.
