Spin-torus ventilation system for concert and other halls consists of free jet with at least 3 double nozzles

摘要

The spin-torus ventilation system is for public halls and areas where the height of the room amounts to at least 25 per cent of the width of the room plus 3 meters. The torus develops as a free jet only if it does not become a wall jet as a result of the coanda effect. At least 3 double nozzles are necessary for forming the torus, with no upper limit to the number and depends on the shape of the hall,