Method of venting smoke from highrise residential buildings

Abstract From the Canadian patent

In highrise residential buildings, venting to remove smoke from corridors is required in case of fire. In prior art systems, separate supply and exhaust shafts are provided and connected to each floor's corridor through motor-controlled damper. A disadvantage of the prior art system is that it thus requires two motorised dampers per floor and an expensive control system and wiring. The invention provides a method of venting smoke from a multi-floor building by providing a single supply and exhaust venting shaft communicating with each floor, with an air supply and exhaust grille opening into each corridor and communicating with the venting shaft; providing a supply source of pressurized air …