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6.2.3.2.(3)
ApplicationIntent
OS3OH1
ObjectiveOH1 Indoor Conditions
Attribution
[F81-OH1.1]
Application
Application 1: 
Construction and installation of ducts and fittings in air duct distribution systems serving heating, ventilating and air-conditioning systems, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].
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Intent
Intent 1: 
To limit the probability that the performance of ducts or fittings will fall significantly below expectations, which could lead to:
  • a failure to deliver conditioned air to designated locations, which could lead to
    • an inability to maintain adequate indoor air temperatures or to control relative humidity, which could lead to condensation, which could lead to the growth of mould and mildew, or
    • the inadequate control of airborne pollutants, or
  • in the case of ventilation systems, depressurization in buildings, which could lead to the spillage of combustion products from fuel-fired appliances.
This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.
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