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9.21.2.2.(4) | Application | Intent |
OH1 | OS3 |
Objective | OH1 Indoor Conditions |
Attribution | |
Application | Application 1: Connection to the same chimney flue of liquid-fuel-burning appliances and appliances burning natural gas or propane, where the appliances have a combined total rated heat output of 120
kW or less and 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 connection to the same chimney flue of liquid-fuel-burning appliances and appliances burning
natural gas or propane, where the appliances have
a combined total rated heat output of 120 kW or less and 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 the ignition of a liquid-fuel-burning
appliance will lead to a relatively sudden increase in flue pressure, which
could lead to the spillage of combustion products from natural-gas- or propane-burning
appliances 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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