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9.32.3.8.(6)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Installation of carbon monoxide alarming devices in each room containing a solid-fuel-burning appliance, in dwelling units that:
  • contain fuel-fired space- or water-heating appliances that are not direct-vented or mechanically vented [see Article 9.32.3.9. for additional CO alarm requirements], or
  • are located in an area where soil gas is deemed to be a problem but they do not incorporate a soil gas mitigation system.
This applies to 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)].
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Intent
Intent 1: 
To limit the probability that carbon monoxide gas entering living space in the rising plume of gases from a solid-fuel-burning appliance will go undetected, which could lead to the acute poisoning or asphyxiation of persons.
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