NEARLY 600,000 CERTIFICATIONS AWARDED SINCE 1994

HC/HFO Certification

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Mainstream's HC/HFO certification covers all aspects of techniques and regulations for the safe handling of flammable hydrocarbon and hydrofluoroolefin refrigerants. Prior to obtaining Mainstream's HC/HFO certification, the technician must have an EPA 608 certification from an EPA approved certifying agency, such as Mainstream.

Mainstream’s HC/HFO Certification Manual is free to read and available here. When you decide to become certified, click the “Get Started ” link above to start an open book test. The $24.95 exam fee includes the exam itself and a wallet-sized certification card. If you do not pass the first time the cost to retest is only $5.95.