EPA Section 608 Universal Study Roadmap

Begin with the terms that appear everywhere: technician certification, regulated refrigerants, venting prohibition, recovery equipment, substitute refrigerants, refrigerant sales restrictions, environmental concerns, and basic safety.

Learn these three terms early because they are easy to confuse. Recovery removes and stores refrigerant. Recycling cleans refrigerant for reuse through basic processing. Reclamation processes refrigerant to a defined purity standard.

Move to small appliances after Core. Focus on access points, recovery during service and disposal, passive versus active recovery concepts, and how small-appliance clues change the correct answer.

Study high-pressure and very-high-pressure appliances next. Focus on leak detection, recovery procedures, evacuation, charging practices, receiver and compressor considerations, and service safety.

Low-pressure systems require a different mental model. Review chillers, vacuum operation, non-condensables, purge units, air and water leaks, recovery under vacuum, and pressure-temperature relationships.

After each equipment type, review safety scenarios. Identify whether the risk involves pressure, oxygen displacement, toxicity, flammability, oil, cylinder handling, opening equipment, or contamination.

Classify every missed question by topic: Core regulation, refrigerant terminology, Type I, Type II, Type III, leak reasoning, recovery practice, safety, or equipment identification. Review the category before taking another mixed set.

Use mixed review after the categories are familiar. Mixed questions force you to identify the equipment type and work context before applying a rule.