Design, to allow for the expansion and contraction of heat-transfer fluid and to maintain system pressure, of heat-transfer systems forming part of heating or cooling systems, in buildings described in Sentence 1.3.3.2.(1) of Division A.

This also applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], with respect to heating systems, including requirements for combustion air, and air-conditioning systems other than those serving individual dwelling units, as stated in Sentence 9.33.1.1.(2).