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9.31.6.2.(1)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Service water heaters in dwelling units, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to buildings described in Sentence 1.3.3.2.(1) of Division A, as stated in Sentence 7.1.3.2.(1) which makes Section 9.31. applicable to dwelling units in all buildings.
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Intent
Intent 1: 
To limit the probability that the performance of service water heaters will fall significantly below expectations, which could lead to malfunctions such as:
  • overheating of water,
  • accidental discharge of hot water, or
  • leakage of carbon monoxide gas into living spaces.
This is to limit the probability of harm to persons.
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