Sentence 9.21.4.4.(1)

  1. OH1
  2. OS3

Objective

OH1 Indoor Conditions

Attribution

(a),(b)[F44-OH1.1]

Intent

Intent 1:

To limit the probability that air turbulence near roof surfaces or projections will lead to downdrafts in chimneys, which could lead to backdrafting of fuel-burning appliances, which could lead to negative effects on the air quality of indoor spaces, which could lead to harm to persons.

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