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Section 608 of the Clean Air Act Amendments of 1990 regulates the handling of refrigerants in stationary HVAC equipment. It covers four main areas: venting prohibition, technician certification, leak repair requirements, and record-keeping.
It is illegal to knowingly vent any refrigerant into the atmosphere during service, maintenance, repair, or disposal of appliances. Critical details:
HFCs like R-410A have zero ODP -- but venting them is still illegal. The venting prohibition covers all refrigerants under Section 608, not just ozone-depleting ones. HFCs are potent greenhouse gases, and the EPA prohibits their release.
Small, unavoidable releases during good-faith recovery efforts are exempt. This covers: small amounts released when disconnecting hoses, refrigerant remaining in oil when removing the compressor, and very small releases during connection/disconnection of service equipment.
NOT covered by de minimis: Deliberately opening a service valve to purge refrigerant, topping off a leaking system without repair, releasing refrigerant to lower pressure for convenience, or any intentional venting regardless of amount.
Technicians who purchase refrigerant in containers larger than 2 pounds must hold valid EPA 608 certification. Distributors must verify certification before completing the sale.
| Certification | Equipment Covered | Typical Applications |
|---|---|---|
| Type I | Small appliances (hermetically sealed, ≤5 lbs) | Window ACs, household refrigerators, vending machines |
| Type II | High-pressure systems (>5 lbs) | Residential AC, heat pumps, commercial refrigeration |
| Type III | Low-pressure systems | Centrifugal chillers (R-11, R-113, R-123) |
| Universal | All types (Core + I + II + III) | Any equipment type; most comprehensive |
EPA 608 certification has no expiration date. Once earned, it is valid for life. However, EPA can revoke certification for violations. A Type I-only certification does not authorize service on Type II or III equipment.
| Equipment Type | Charge Size | Built Before 11/15/1993 | Built After 11/15/1993 |
|---|---|---|---|
| High-pressure (R-22, R-410A, R-134a) | Under 200 lbs | 0 psig | 0 psig |
| High-pressure (R-22, R-410A, R-134a) | 200 lbs or more | 4 in. Hg vacuum | 10 in. Hg vacuum |
| Low-pressure (R-11, R-113, R-123) | Any size | 25 mm Hg absolute | 25 mm Hg absolute |
| Small appliances -- active recovery | ≤5 lbs | 90% of charge | 90% of charge |
| Small appliances -- passive (operable compressor) | ≤5 lbs | 80% of charge | 80% of charge |
For commercial/industrial equipment with 50 lbs or more of refrigerant, mandatory repair when annual leak rate exceeds 30%.
Annual leak rate = (Refrigerant added per year / Total system charge) x 100%
Example: 200 lb system requires 65 lbs makeup per year: 65/200 = 32.5% -- exceeds 30%, repair required within 30 days.
When threshold is exceeded:
Technicians must maintain service records for a minimum of 3 years. Records must include:
Owners of systems with 50+ lbs must maintain records on-site, available for EPA inspection.
| Refrigerant State | Same System? | Different System, Same Owner? | Can Sell? |
|---|---|---|---|
| Recovered (unprocessed) | Yes | Yes | No |
| Recycled (cleaned on-site) | Yes | Yes | No |
| Reclaimed (ARI 700 purity) | Yes | Yes | Yes |
3 years = record retention period.
30% = annual leak rate threshold requiring repair (50+ lb systems).
30 days = deadline to repair a leak exceeding the threshold.
These three numbers are the most commonly tested figures in the regulations module.