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9.32.3.11.(9) | Application | Intent |
| OH1 | OS3 |
| Objective | OS3 Safety in Use |
| Attribution | |
| Application | Application 1: Sizing of ducts, in self-contained heating-season
mechanical ventilation systems serving single dwelling
units with 5 or fewer bedrooms that are supplied with electrical power
and a heating system, in buildings to which:
Exceptions:
except:
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| Intent | Intent 1: To limit the probability of excessive negative pressure,
which could lead to the spillage of carbon monoxide gas from fuel-burning
appliances that are susceptible to spillage, which could lead to the acute
poisoning or asphyxiation of persons. Intent 2: To expand the application of Subsection 9.33.4. to
ducts in residential occupancies where the size of a duct cannot be determined
using Table 9.32.3.11.A. or 9.32.3.11.B.
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