1994: Mandatory Certification Begins

This is a look back at a 1994 rule change under the Clean Air Act, not new policy. Starting November 14, 1994, HVAC and refrigeration technicians had to pass an EPA-approved test before they could buy or handle refrigerant in air conditioning and refrigeration equipment containing CFC or HCFC chemicals, the older refrigerants blamed for damaging the ozone layer. Passing meant scoring at least 70% on questions drawn from an official EPA test bank.

For homeowners today, this history explains why any technician working on your air conditioner or refrigeration equipment needs formal certification to purchase refrigerant. That requirement, often called Section 608 certification, is still the baseline credential in the industry more than 30 years later. It's part of why refrigerant handling is treated carefully: leaks and improper disposal of these chemicals can harm the ozone layer, so the government restricts who can legally buy and work with them.

There's no action for you to take here. This is simply a reminder of when and why licensing became mandatory for anyone servicing cooling systems that use regulated refrigerants. If you're ever getting a new air conditioner or heat pump installed, or having an older system serviced, it's worth knowing that the person handling refrigerant is required to hold this certification, a rule that traces back to this 1994 deadline.