A technician recovers refrigerant from a household window air conditioner (a small appliance) whose compressor still runs. Recovery equipment made after November 15, 1993 must remove at least what percentage of the charge?
a.70 percent
b.100 percent
c.90 percent
d.80 percent
Explanation
For small appliances, recovery equipment manufactured on or after November 15, 1993 must recover 90 percent of the refrigerant when the appliance's compressor is operating, or the system must reach 4 inches Hg vacuum. If the compressor is not operating, the requirement is 80 percent. Reaching 100 percent is not physically required by the rule.
Law Reference: 40 CFR §82.156This topic, taught in full in the EPA Section 608 Certification guide. EPA 608 Universal Study Guide (2026) — Core + Type I/II/III, with the 2027 A2L update — PDF + EPUB, $14.99 · 14-day refund →
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