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9.32.3.12.(5)
OH1
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Drainage of condensate, 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 accumulation of condensate in the exhaust-air side of heat recovery ventilators, which could lead to:
  • the freezing of condensate, which could lead to the blockage of condensate drains, which could lead to inadequate ventilation, or
  • leakage between exhaust and supply airstreams, which could lead to the generation of pollutants from biological growth and their entry into living space.
This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.
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