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9.21.2.2.(2) | Application | Intent |
OS3 |
Objective | OS3 Safety in Use |
Attribution | |
Application | Application 1: Location of multiple fuel-burning appliances having
a combined total rated heat output of 120 kW or less and connected
to the same chimney flue,
where rectangular masonry or concrete chimneys are
not more than 12 m in height, 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 the location of multiple fuel-burning appliances having a combined total rated heat output
of 120 kW or less and connected to the same chimney flue, where rectangular masonry or
concrete chimneys are not more than 12 m in height, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6], as stated in Sentence 6.3.1.2.(1).
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Intent | Intent 1: To limit the probability that a momentary increase in flue
pressure, created on firing of a naturally aspirating fuel-burning appliance,
will lead to the spillage of combustion products into living space through
other naturally aspirating combustion appliances that are in standby mode
and connected to the same flue, 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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