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9.32.3.13.(8) | Application | Intent |
| OH1 | OS1 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Exhaust outlets, 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 the entry of vermin (such as
mice, rats or squirrels) into buildings, which could lead to damage to electrical
wiring, which could lead to the ignition of combustible materials, which could
lead to harm to persons. Intent 2: To exempt exhaust outlets serving heat recovery ventilators
from the requirement to install backdraft dampers, on the basis that the internal
resistance of the heat recovery ventilator core provides sufficient resistance
to backdraft. |
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