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9.33.6.13.(1) | Application | Intent |
OH1 | OS3 |
Objective | OH1 Indoor Conditions |
Attribution | |
Application | Application 1: Placement of return-air inlets, in air duct distribution
systems serving heating systems in which the rated heat input does not exceed 120
kW and serving only one dwelling unit,
in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]. |
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Intent | Intent 1: To limit the probability of an inadequate supply of make-up
air, which could lead to negative pressure in a fire chamber, which could
lead to the flow of combustion products into the air distribution system,
which could lead to negative effects on the air quality of indoor spaces,
which could lead to harm to persons. |
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