The entry from "Science in China" Wikipedia science entry in preparation and application of a project audit.

R134a (1,1,1,2-tetrafluoro-ethane) is a most widely used in the low temperature environment-friendly refrigerant, it has good performance, making it a very effective and secure R12 (Dichloro-difluoromethane) alternative, and can be used in most areas of use R12 refrigerant.

R-134a (1,1,1,2-tetrafluoro-ethane) is a non-chlorine atoms, does not damage the ozone layer, has a good safety (without flammable, explosive, toxic, non-irritant, non-corrosive), refrigerants, refrigeration capacity and its efficiency and R-12 (Dichloro-difluoro-methane, freon) are very close, so is considered excellent long-term alternative refrigerants. 

R-134a is now internationally recognized environmental R-12 best alternatives.

Completely destroy the ozone layer, is that most countries in the world recognized and recommended the use of environmentally-friendly refrigerant, is also the prevailing alternative refrigerants and are widely used on new refrigeration air conditioning installation and repair process and then add [1]. Very low toxicity for R134a, nonflammable in air, security categories A1, is very safe refrigerants.

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