HC Refrigerants	HFC R134a
Non-Global Warming (GWP negligible)	Global Warming (GWP of 3200 on Greenpeace calculations and publications
Non-Ozone Depleting	Non-Ozone Depleting
Non-Toxic	Animal testing has indicated that with repeated exposure Benign testicular cancer may develop Postmortem will indicate increased organ weight Hazardous hydrofluoric acid and possible carbonyl fluoride (both of which can cause severe central nervous system reactions) Human testing has indicated that with repeated and/or high concentration single exposure humans may experience any of the following: Reduced oxygen intake Temporary alteration of hearts electrical activity Irregular pulse or palpitations Inadequate circulation Heart irregularities Tremors and other central nervous system symptoms Unconsciousness or death Thermal decompostion forms (exposure to open flame, glowing metal surfaces)
Compatible with both mineral and synthetic oils including PAG and Ester oils	Not compatible with mineral oils. Need Ester and PAG only. Ester oils are very hydroscopic. PAG oils are subject to toxic registration in certain states and regions.
Non-Corrosive	Highly Corrosive
Pressure "high side" of MVACS approx. 150 psig	Pressure "high side" of MVACS approx. 300 psig
Energy efficient compared to R-12	Not energy efficient compared to R-12