(1)
If a fire alarm system is installed, an air-handling system shall be designed to prevent the circulation of smoke upon a signal from a duct-type smoke detector if the air handling system
(a)
serves more than one storey,
(b)
serves more than one suite in a storey,
(c)
serves more than one fire compartment required by Sentence 3.3.3.5.(2) or Sentence 3.3.4.11.(2), or
(d)
is not provided with fire dampers as permitted by Sentence 3.1.8.8.(4).