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3.2.6.2.(5)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Stopping, in the event of a fire, air moving fans in a system that serves more than 2 storeys.
This applies to high buildings, as defined in Sentence 3.2.6.1.(1):
Exceptions: 
except for:
  • exhaust fans in kitchens, washrooms and bathrooms in dwelling units, and
  • fans used for smoke venting as required by Article 3.2.6.6.
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Intent
Intent 1: 
To limit the probability that smoke will migrate from a storey to upper storeys in a fire situation during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to:
  • delays or inefficiencies in fire suppression operations, which could lead to the spread of fire, which could lead to harm to persons, including emergency responders, and
  • delays in evacuation or moving to a safe place, which could lead to harm to persons.
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