Compositions and methods for detecting leaks in HVAC/R systems

A method for detecting a leak in a furnace system, comprising the steps of:

• optionally blocking a combustion air intake;
• activating a combustion blower;
• providing a leak detector probe in a combustion exhaust stream;
• introducing at least one leak detection fluid into a furnace supply air duct, said at least one leak detection fluid being selected from the group consisting of:
• 4-bromo-3-chloro-3,4,4-trifluoro-1-butene,
• 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether,
• 2-chloro-1,1,2-trifluoroethyl difluoromethyl ether,
• 1-bromo-2-(trifluoromethyl)-3,3,3-trifluoropropene,
• methyl 2,2,2-trifluoroethyl-1-(trifluoromethyl)ether,
• 4-bromo-1,1,1,3,4,4-hexafluoro-2-(trifluoromethyl)-2-butene,
• heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether,
• perfluorodibutyl ether,
• 4-bromo-1,1,1,4,4-pentafluoro-2-(trifluoromethyl)-2-butene,
• methyl perfluorobutyl ether,
• 3-bromo-1,1,2,3,4,4,4-heptafluorobutene,
• 1-bromo-1,3,3,3-tetrafluoro-2-(trifluoromethyl)-1-propene,
• 4-bromo-1,1,2,3,3,4,4-heptafluorobutene,
• 2-bromo-1,1,1,3,4,4,4-heptafluoro-2-butene,
• 3,3,3-trifluoro-bis-2,2-(trifluoromethyl)-1-propanol,
• 1,2-(Z)-bis(perfluoro-n-butyl)ethylene,
• 1,1,1,3,3,3-hexafluoro-2-(trifluoromethyl)-2-propanol,
• 2H,3H-decafluoropentane,
• ethyl perfluorobutyl ether,
• 1-bromo-perfluoro-2-butene,
• 1,1,1,5,5,5-hexafluoro-2,4-pentanedione,
• perfluoro-2-butyltetrahydrofuran,
• 1H,2H,4H-nonafluorocyclohexane,
• (E)-2-bromo-1,1,1,4,4,4-hexafluoro-2-butene,
• 1-bromo-bis(perfluoromethyl)ethylene,
• 1-(bromodifluoromethoxy)-2-(trifluoromethyl)-1,3,3,3-tetrafluoro-1-propene,
• 1-methoxy-2-trifluoromethyl-1,3,3,3-tetrafluoro-1-propene,
• fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether,
• (E)-2,3-dichlorohexafluoro-2-butene,
• 2-bromo-3,3,4,4,4-pentafluorobutene,
• 3-bromo-2,3,4,4,4-pentafluorobutene,
• 4-bromo-2,3,3,4,4-pentafluorobutene,
• 1-(bromodifluoromethoxy)-1,2,3,3,3-pentafluoro-1-propene,
• 3-bromo-3,3-difluoro-2-(trifluoromethyl)-propene,
• 1-bronco-1,1,4,4,4-pentafluoro-2-butene,
• 3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225),
• 1-(bromodifluoromethoxy)-2-(trifluoromethyl)-3,3,3-trifluoro-1-propene,
• methyl 1,1,2,2,3,3-hexafluoropropyl ether,
• trifluoroacetic anhydride,
• 2-bromo-1,1,2,2-tetrafluoroethoxy-trifluoroethene,
• 2,2-difluoroethyl 1,1,2,2-tetrafluoroethyl ether,
• 1,3-dichloro-1,1,2,2,3-pentafluoropropane,
• bis(2,2,2-trifluoroethyl)ether,
• methyl heptafluoropropyl ketone,
• difluoromethyl 2,2,3,3-tetrafluoropropyl ether,
• 4-bromo-3,3,4,4-tetrafluoro-1-butene,
• bis(difluoromethoxy)-tetrafluoroethane,
• 1-(2,2,2-trifluoroethoxy)nonafluoro-cyclohexene,
• 1,2-dichloro-3,3,4,4,5,5,6,6-octafluoro-cyclohexene,
• (Z)-1-bromo-1,2-difluoro-2-(2,2,2-trifluoroethoxy)ethane,
• (bromodifluoromethyl)-pentafluorobenzene,
• 1-(bromodifluoromethoxy)-2-(trifluoromethyl)ethane,
• 2-bromoheptafluorotoluene,
• (2,2,2-trifluoroethyl)(2-bromo-2,2-difluoroethyl)ether,
• 3-bromoheptafluorotoluene,
• 4-bromoheptafluorotoluene,
• 1-(bromodifluoromethoxy)-1-(trifluoromethyl)ethane,
• perfluorotoluene,
• methyl trichloroacetate,
• 1-bromo-2,4,6-tris(trifluoromethyl)benzene,
• methyl pentafluoropropanoate,
• 4-bromo-1,1,2,3,3-pentafluorobutene,
• 1-(bromodifluoromethoxy)-2-(trifluoromethoxy)ethane,
• 1,1,4,4,4-pentafluoro-1-bromo-2-butanone,
• 1,1,5,5,5-pentafluoro-1-bromo-3-pentanone,
• 1,2-dichloro-hexafluoro-cyclopentene,
• 3-bromo-2,3,3-trifluoropropene,
• (Z)-3-bromo-1,3,3-trifluoropropene, and
• 3-bromo-3,3-difluoro-1-propene;
• and
• monitoring output from the leak detector probe.