9.33.6.12.(1)

Objective

OS3 Safety in Use

Attribution

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 upon operation of a furnace distribution fan, which could lead to the flow of carbon monoxide gas into the air distribution system, which could lead to the acute poisoning or asphyxiation of persons.

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