Which refrigerant is given in 40 CFR 82.152 as an example for a very high-pressure appliance?
Section 608 regulations · EPA 608 Core. The correct answer, and the reasoning behind it.
Pressure classes, recovery equipment certification, AHRI 700, the sales restriction and the venting ban.
The question
Which refrigerant is given in 40 CFR 82.152 as an example for a very high-pressure appliance?
- R-500
- R-123
- R-407C
- R-23Correct answer
Why “R-23” is correct
A very high-pressure appliance uses a refrigerant with a critical temperature below 104 °F or a saturation pressure above 355 psia at 104 °F. The rule names R-13, R-23, R-503, R-508A and R-508B, used in very low temperature equipment.
Source: 40 CFR 82.152
Why the other answers are wrong
- R-500 — R-500 is listed as a medium-pressure refrigerant.
- R-123 — R-123 is a low-pressure refrigerant used in chillers.
- R-407C — R-407C is listed as a high-pressure refrigerant.
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