Under 40 CFR Part 82, above what annual leak rate must it be repaired?

Leak repair requirements · EPA 608 Type III. The correct answer, and the reasoning behind it.

Allowable annual leak rates for low-pressure appliances.

The question

An R-123 centrifugal chiller with 900 pounds of charge cools an office tower. Under 40 CFR Part 82, above what annual leak rate must it be repaired?

• A20 percent
• B30 percent
• C35 percent
• D10 percentCorrect answer

Why “10 percent” is correct

Comfort cooling appliances, and other appliances with 50 pounds or more of an ozone-depleting refrigerant not otherwise covered, have a 10 percent leak rate under 40 CFR 82.157(c)(2)(iii). Chillers serving offices are comfort cooling.

Source: 40 CFR 82.157(c); EPA: Leak Repair Requirements

Why the other answers are wrong

• 20 percent — 20 percent applies to commercial refrigeration, not comfort cooling.
• 30 percent — 30 percent applies to industrial process refrigeration.
• 35 percent — 35 percent is not a leak rate in the current rule.

Practice more of this

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