| 摘要 |
Ventilation system for ventilating especially classrooms (1) and similar rooms, comprising a lowered ceiling (3) and means, e.g. a ventilator (5), for forced air inlet from the outside air (6) into the room (2) above the lowered ceiling, and air outlet openings (7) mainly evenly spaced over the whole surface of the lowered ceiling. The exhaust air may be led via an HR unit (12-16) to preheat the supply air. Blowing the supply air along the underside of the concrete upper floor (4) enables cooling that floor at night. By day this cold may be used to cool the supply air.
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