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9.32.3.10.(6) | Application | Intent |
| OS3 | OH1 |
| Objective | OS3 Safety in Use |
| Attribution | |
| Application | Application 1: Maximum sound ratings for fans installed to satisfy Articles 9.32.3.3., 9.32.3.4., 9.32.3.5., 9.32.3.6., 9.32.3.7. and 9.32.3.8., where
there is less than 1 m of duct between the fans and visible interior
surfaces of rooms. This applies to 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:
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| Intent | Intent 1: To limit the probability that excessively noisy fans will
lead to occupants disabling or not using fans, which could lead to excessive
negative pressure (where supply fans alone are disabled), 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 exempt fans with less than 1 m of duct between
themselves and unfinished basements, furnace rooms, utility rooms or attics
from the sound ratings specified in Table 9.32.3.10.B., on the basis
that people do not normally occupy such areas for lengthy periods and would
therefore be unlikely to be disturbed by noisy fans. |
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