(1)
This Section applies to the design and installation of
(a)
heating systems, including requirements for combustion air, and air-conditioning systems serving only one dwelling unit, and
(b)
radiant heating systems in houses with a secondary suite including their common spaces.
(2)
The design and installation of heating systems, including requirements for combustion air, and air-conditioning systems other than those described in Sentence (1) shall conform to Part 6. (See Note A-9.33.1.1.(2) and Subsection 9.10.10.)
(2.1)
Repairs or component replacements that change the capacity or extent of safety of an existing heating, ventilating or air-conditioning system and that alter the method of operation shall conform to this Code.
(3)
Air duct distribution systems serving one of the dwelling units in a house with a secondary suite shall not be directly interconnected with other parts of the house.