Div. B › Part 3 › 3.6 › 3.6.3 — Vertical Service Spaces and Service Facilities

3.6.3.4 — Exhaust Duct Negative Pressure

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(1) If a vertical service space contains an exhaust duct that serves more than one fire compartment, the duct shall have a fan located at or near the exhaust outlet to ensure that the duct is under negative pressure.

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exhaust duct

means a duct through which air is conveyed from a room or space to the outdoors.

fire compartment

means an enclosed space in a building that is separated from all other parts of the building by enclosing construction providing a fire separation having a required fire-resistance rating.

service space

means space provided in a building to facilitate or conceal the installation of building service facilities such as chutes, ducts, pipes, shafts or wires.

vertical service space

means a shaft that is oriented essentially vertically and that is provided in a building to facilitate the installation of building services, including mechanical, electrical and plumbing installations and facilities such as elevators, refuse chutes and linen chutes. Vulnerable area has the same meaning as in subsection 2 (1) of the Clean Water Act, 2006.

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