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.