9.21.3.10.(1)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability that:

  • rainwater will flow across the chimney cap and into the flue, which could lead to damage to the liner due to freeze-thaw stresses,
  • mechanical or freeze-thaw damage to the extended portion of the liner will lead to blockage of the flue or subsequent freeze-thaw damage to the upper courses of surrounding masonry, or
  • flue gases will enter the space between the liner and the chimney.

This is to limit the probability of the spillage of combustion products into living space, which could lead to negative effects on the air quality of indoor spaces, which could lead to harm to persons.

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