Federal certification required to purchase or recover automotive A/C refrigerant. Lifetime credential, no renewal.

Who needs it

Any tech who services vehicle A/C systems.

How to get it

Take the open-book exam online (Mobile Air Climate Systems Association — MACS — and others). About 90 minutes, lifetime cert.

Cost

~$20 online.

Where to start

EPA — Section 609 Technician Training ↗