Sentence 9.21.3.3.(2)

  1. OH1
  2. OP1
  3. OS3
  4. OS1
  5. OS2

Objective

OS3 Safety in Use

Attribution

Intent

Intent 1:

To limit the probability that:

  • slight variations in liner dimensions and minor misalignments will lead to a mortar bed of less than 6 mm as required by CAN/CSA-A324-M, “Clay Flue Liners,” or
  • in the event of a chimney fire, the flue liner will fail due to high flue gas temperatures.

This is to limit the probability of the spillage of combustion products, which could lead to the leakage of carbon monoxide gas into living space, which could lead to the acute poisoning or asphyxiation of persons.

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