Under 40 CFR 82.152, how is an appliance using R-134a classified?
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
Under 40 CFR 82.152, how is an appliance using R-134a classified?
- Low-pressure
- Medium-pressureCorrect answer
- High-pressure
- Very high-pressure
Why “Medium-pressure” is correct
R-134a has a saturation pressure between 45 and 170 psia at 104 °F, so it is a medium-pressure refrigerant. The rule lists R-114, R-124, R-12, R-134a and R-500 as medium-pressure examples. Type II certification covers medium-, high- and very high-pressure appliances.
Source: 40 CFR 82.152
Why the other answers are wrong
- Low-pressure — Low-pressure refrigerants such as R-123 are below 45 psia at 104 °F.
- High-pressure — High-pressure examples are refrigerants like R-22 and R-410A.
- Very high-pressure — Very high-pressure refrigerants such as R-23 have critical temperatures below 104 °F.
Practice more of this
More EPA 608 Core practice questions, or see every EPA 608 practice test.
Unofficial, not affiliated with the EPA or any EPA-approved certifying organization. Questions are original practice written from public EPA material, not real exam questions.