Prepare for the Type III certification exam with focused practice on low-pressure HVAC systems and equipment.
Start Your PrepThe low-pressure systems certification for HVAC technicians
Type III certification is specifically for technicians working with systems that operate below atmospheric pressure, including centrifugal chillers and certain refrigeration equipment.
If you work on low-pressure systems containing more than 5 pounds of refrigerant, EPA certification is legally required under Section 608 of the Clean Air Act.
Type III certification opens doors to commercial HVAC work, industrial refrigeration, and specialized equipment maintenance positions.
Our Type III practice tests cover evacuation procedures, recovery techniques, and safety protocols specific to low-pressure systems.
To earn Type III certification, you must pass both the Core exam and the Type III-specific exam. Our materials cover both sections thoroughly.
Questions designed to mirror actual job scenarios you'll encounter working with low-pressure HVAC and refrigeration systems.
Understanding when Type III certification is required
If you work on centrifugal chillers, absorption systems, or other low-pressure commercial HVAC equipment, Type III certification is essential.
Technicians in food processing, cold storage, and industrial facilities often work with low-pressure ammonia or CO2 systems requiring Type III credentials.
Facilities managers and building engineers maintaining large commercial HVAC systems typically need Type III certification for compliance.
Start practicing with our comprehensive Type III test preparation materials.
Take Practice TestEverything about EPA Type 3 certification
Type II covers high-pressure systems (those with pressures above 0 psig at 68°F), while Type III covers low-pressure systems (those with pressures below 0 psig at 68°F). Centrifugal chillers typically fall under Type III, while typical split systems fall under Type II.
The Type III section contains 25 questions in addition to the 50 Core questions. You'll need to score at least 84% (21 correct) on the Type III portion to pass. Our practice tests help you aim for even higher scores.
Centrifugal chillers, absorption refrigeration systems, and some industrial ammonia systems operate at pressures below atmospheric pressure. These systems require Type III certification for technicians working on them.
No, the Core exam must be passed as part of every EPA 608 certification. You cannot earn Type III certification alone; it's always combined with Core, and you must pass Core to proceed to any category exam.
Type III is often considered more challenging because it covers specialized equipment like centrifugal chillers that many technicians don't work with regularly. The Core knowledge remains the same, but Type III-specific content is more niche.
If you fail the Type III portion while passing Core, you can retake just the Type III section on a future exam. However, most testing centers require you to retake the entire exam. Our practice tests help ensure you pass on the first attempt.