CFR›Title 10›Chapter II›Part 431›Subpart F ContainsSections 431.91–431.92; Subject groups Energy Efficiency Standards–Test ProceduresCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart F—Commercial Air Conditioners and Heat Pumps Contents 431.91 § 431.91 Purpose and scope. 431.92 § 431.92 Definitions concerning commercial air conditioners and heat pumps. Energy Efficiency Standards Energy Efficiency Standards Section 431.97; Appendices A–G1 Test Procedures Test Procedures Sections 431.95–431.96 Source69 FR 61969, Oct. 21, 2004, unless otherwise noted. Previous E Subpart E—Commercial Packaged Boilers Next G Subpart G—Commercial Water Heaters, Hot Water Supply Boilers and Unfired Hot Water Storage Tanks