R-134a vs R12 Temp Pressure Chart

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R-134a vs R12 Temp Pressure Chart

Postby ACProf » Thu Oct 08, 2009 9:38 am

Here's a comparison of R-134a to R-12 refrigerant vapor pressures at specific temperatures.
R-134A has a slightly lower pressure at evaporator temperatures (30-40 degrees), but R-134a also has a much higher pressure at condenser temperatures (120-150 degrees).

NOTE: For best heat transfer, condenser temperatures should be 30-40 degrees hotter than the ambient air temperature entering the condenser.

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