EPA 608 Venting Rules, Sales Restrictions and Penalties
Updated October 27, 2026
The EPA 608 Core section tests the rules that make certification matter: you may not knowingly vent refrigerant, only certified technicians can buy most refrigerants, and violations carry heavy penalties. Here’s what to know, followed by free practice questions.
The venting prohibition
Under Section 608 of the Clean Air Act, it’s illegal to knowingly vent ozone-depleting refrigerants (CFCs and HCFCs) and their substitutes (such as HFCs) while maintaining, servicing, repairing or disposing of equipment.
- De minimis releases, small releases that happen while following required practices, such as connecting and disconnecting hoses during proper recovery, are allowed.
- EPA exempts a short list of substitutes from the venting prohibition, including carbon dioxide, nitrogen and water in any application, and ammonia in commercial or industrial refrigeration.
Sales restrictions
Sellers must see proof of certification before selling most refrigerants to technicians. This keeps refrigerant in the hands of people trained to recover it.
Penalties
The Clean Air Act sets civil penalties per day for each violation, adjusted every year for inflation. As of the 2025 adjustment, the figure is $124,426 per day per violation. Knowing violations can also be prosecuted as crimes. EPA may pay an award to a person who gives information that leads to a penalty.
Free practice questions
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When is it legal to knowingly vent HCFC refrigerant to the atmosphere?Answer: AKnowingly venting ozone-depleting refrigerants and their substitutes is prohibited. Only small de minimis releases while following required practices are allowed.
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Which is an example of a de minimis release?Answer: BA de minimis release is a small, unavoidable release while following required practices, such as connecting and disconnecting hoses.
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How are Clean Air Act civil penalties for refrigerant violations set?Answer: CCivil penalties are set per day for each violation and adjusted every year for inflation; as of the 2025 adjustment, $124,426 per day per violation.
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Which substitute does EPA exempt from the venting prohibition in any application?Answer: DEPA exempts certain substitutes, including carbon dioxide, nitrogen and water in any application. HFCs such as R-410A and R-134a are not exempt.
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Why must refrigerant sellers see proof of certification?Answer: AThe sales restriction helps make sure refrigerant is handled by certified technicians who know how to recover it instead of venting it.
Pass the EPA 608 exam on your first try
- All 168 questions across Core, Type I, Type II and Type III
- An explanation for every answer, with the rule or principle behind it
- Unlimited practice exams per section, scored like the real test (18 of 25 to pass)