The Foundation: Montreal Protocol & Clean Air Act
The Montreal Protocol was signed in 1987 as an international treaty to phase out ozone-depleting substances worldwide. The United States implemented it domestically through the Clean Air Act Amendments of 1990, which gave the EPA authority to regulate refrigerant handling under Section 608. These two foundational actions set the stage for every regulation technicians must follow today.
Montreal Protocol (1987) was the international treaty; Clean Air Act Amendments (1990) gave EPA domestic enforcement authority under Section 608.
1992-1993: Venting Bans & Equipment Standards
On July 1, 1992, it became illegal to knowingly vent CFC and HCFC refrigerants during service, maintenance, repair, or disposal. This date also marked when refrigerant sales became restricted to EPA-certified technicians only. November 15, 1993 is another critical exam date: recovery equipment manufactured after this date must meet stricter EPA certification standards, and different evacuation level requirements apply to equipment made before versus after this date.
July 1, 1992: CFC/HCFC venting banned, sales restricted to certified techs. November 15, 1993: stricter recovery equipment certification standards took effect.
1995-1996: HFC Venting Ban & CFC Production End
On November 15, 1995, the venting prohibition was extended to include HFC refrigerants and all substitute refrigerants, not just CFCs and HCFCs. This means no refrigerant of any type may be knowingly vented. On January 1, 1996, production and import of CFCs was banned in the United States. After this date, CFC refrigerants could only be obtained from existing stockpiles or through reclamation. This made proper recovery and reclamation even more critical.
November 15, 1995: venting ban extended to HFCs. January 1, 1996: CFC production and import banned in the US.
Complete Date Reference
Modern Regulations: R-22 Phase-Out, Kigali & AIM Act
R-22 (HCFC-22) was phased out in two steps: January 1, 2010 banned its use in new equipment, and January 1, 2020 banned all production and import. Existing R-22 can still be used if recovered or reclaimed. The Kigali Amendment (2016) extended the Montreal Protocol to include HFC phase-downs worldwide. The AIM Act (December 27, 2020) gave EPA authority to phase down HFC production and consumption in the US by 85% over 15 years. As of January 1, 2026, HFC leak repair requirements apply to systems containing 15 or more pounds of refrigerant.
Kigali Amendment (2016) extended Montreal Protocol to HFCs. AIM Act (2020) phases down US HFC production by 85%. January 1, 2026: HFC leak repair rules for 15+ lb systems.
Key Dates to Memorize
- Montreal Protocol (1987) and Clean Air Act Amendments (1990) established the legal framework for refrigerant regulation.
- July 1, 1992: venting CFC/HCFC banned; refrigerant sales restricted to certified technicians only.
- November 15, 1993: recovery equipment manufactured after this date must meet stricter certification and evacuation standards.
- January 1, 1996: CFC production and import banned in the United States.
- R-22 phase-out: no new equipment after January 1, 2010; production/import banned January 1, 2020.
- AIM Act (December 27, 2020) phases down HFC production by 85%; HFC leak repair rules for 15+ lb systems effective January 1, 2026.