System for protecting the escape routes of buildings from smoke and other noxious gases in the event of fire

摘要

System consisting in providing clean air to said escape routes by means of fans/blowers, in such a manner that the air in the aforesaid routes is at greater pressure than in the region of the fire and, in this way, invasion of said routes by the smoke and noxious gases is prevented. In parallel, other areas of the building will be pressurized, favouring the diffusion of the smoke via the inside, such as the lift (elevator) shafts. In order to prevent the consequences of a constriction of the flow of air supplied by the fans, the latter will be of the type in which for a reduction in the flow there corresponds a less than proportional increase in pressure.