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9.32.3.13.(12)
OH2OS1
ObjectiveOH2 Sanitation
Attribution
Application
Application 1: 
Material for screens and grilles on air intake and exhaust openings, in self-contained heating-season mechanical ventilation systems serving single dwelling units with 5 or fewer bedrooms that are supplied with electrical power and a heating system, in buildings to which:
  • Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], or
  • Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6 and Sentence 6.2.2.1.(3)].
Exceptions: 
except as stated in Sentence 9.32.3.1.(1), which applies to heating-season mechanical ventilation systems designed to comply with CAN/CSA-F326-M.
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Intent
Intent 1: 
To limit the probability of the premature failure of screens or grilles on air intake or exhaust openings, which could lead to the entry of vermin or insects into buildings, which could lead to unsanitary conditions, which could lead to harm to persons.
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