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9.33.9.1.(1)
OH1
ObjectiveOH1 Indoor Conditions
Attribution
(a),(b),(c) [F43-OH1.1] [F51-OH1.2]
Application
Application 1: 
Installation of cooling units combined with fuel-fired furnaces sharing a duct system, in heating and air-conditioning systems serving only one dwelling unit, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of the inappropriate placement of cooling system evaporator coils, which could lead to overheating of the evaporator coil, which could lead to an increase in pressure, which could lead to:
  • the rupture of the coil and loss of refrigerant gases, or
  • the inadequate operation of cooling systems.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces, or
  • the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.
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