A long-term, non-ozone depleting replacement for R-22 in various air-conditioning applications as well as in positive displacement refrigeration systems. For new equipment and retrofits. Not recommended for use in chillers with a flooded evaporator.
NotesCommercial Refrigeration: Reasonable performance match to R-22 in medium temperature refrigeration. Lower capacity in low temperature refrigeration systems. Air Conditioning and Heat Pumps: Best retrofit alternative to R-22. Close performance match with slightly higher operating pressures.
Chemical NameDifluoromethane, Pentafluoroethane, Tetrafluoroethane
Chemical NotationCH2F, CF3CHF2, CF3CH2F
Molecular Weight (lbm/lbmol)86.2
Boiling Point @ 1 Atm, (°F)-46.5
Freezing Point @ 1 Atm, (°F)-256
Critical Temperature (°F) (ASTM D-1321)186.86
Critical Pressure* (psia)671.49
Saturated Liquid Density @ 86°F, (lb/ft3)69.6
Specific Heat of Liquid @ 86°F, (Btu/lb•°F)0.38
Specific Heat of Vapor @ Constant Pressure* (Cp), @ 86° and 1 Atm, (Btu/lb•°F)0.18
Flammable range, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)None
ANSI/ASHRAE Standard 34-1992 Safety Group ClassificationA1