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9.32.3.4.(10) | Application | Intent |
| OH1 | OS3 | OS2 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Airflow measurement and adjustment of flow-regulating
dampers in outdoor air supply ducts in self-contained
heating-season mechanical ventilation systems coupled to forced air heating
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 as stated in Sentence 9.32.3.1.(1), which applies to
heating-season mechanical ventilation systems designed to comply with CAN/CSA-F326-M.
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| Intent | Intent 1: To limit the probability that the outdoor air supply flow
will exceed the normal operating exhaust capacity of the principal ventilation
fan, which could lead to excessive positive pressure within the dwelling unit,
which could lead to condensation within the building envelope, which could
lead to the deterioration of building elements, which could lead to structural
failure, which could lead to harm to persons. |
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