CFR›Title 10›Chapter II›Part 460›Subpart C ContainsSections 460.201–460.205CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart C—HVAC, Service Hot Water, and Equipment Sizing Sections 460.201 § 460.201 Duct system. 460.202 § 460.202 Thermostats and controls. 460.203 § 460.203 Service hot water. 460.204 § 460.204 Mechanical ventilation fan efficacy. 460.205 § 460.205 Equipment sizing. Previous B Subpart B—Building Thermal Envelope