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 into living space, which could
lead to negative effects on the air quality of indoor spaces, which
could lead to harm to persons.