CFR›Title 40›Chapter I›Part 63›Subpart XX›Subject Group Applicability for Heat Exchange Systems ContainsSections 63.1083–63.1084CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Sections 63.1083 § 63.1083 Does this subpart apply to my heat exchange system? 63.1084 § 63.1084 What heat exchange systems are exempt from the requirements of this subpart? Next Applicability for Waste Requirements Applicability for Waste Requirements