Know your type.
Pass the test.
Protect the work.
Choose the EPA 608 certification that matches your equipment, follow the real testing path, study only the sections you need, and keep your practice progress without creating an account.
What do you need to solve today?
Do not browse a pile of HVAC pages. Pick your current problem and move to the exact next step.
I do not know which type I need
Separate Type I, Type II, Type III, Universal, and Section 609 before paying for a test.
Choose my type →I need a legitimate test provider
Use the EPA-approved provider list and know what to verify before paying.
Find approved testing →I do not know what to study
Use Core plus only the equipment section required for your target certification.
Build my study plan →I need realistic free questions
Start with 10 questions or run a full 100-question Universal simulation.
Practice free →I am confused about online and open-book tests
Understand proctoring, Type I exceptions, and why an open-book Core cannot count toward Universal.
Understand the rules →I need the next career step
Turn the card into a credible HVAC helper or technician application.
Plan the job step →One federal program. Four certification outcomes.
Certification depends on the appliance category—not on one refrigerant brand or a generic “HVAC license.”
Factory-sealed equipment containing five pounds or less, such as qualifying refrigerators, room A/C units, and dehumidifiers.
Study Type I →Residential and commercial high-pressure systems, except small appliances and motor-vehicle A/C.
Study Type II →Pass Core and all three technical sections in a proctored format that qualifies toward Universal.
Build a Universal plan →From uncertain to test-ready.
The site is designed as a closed loop, not a collection of disconnected articles.
Choose the equipment category
Save Type I, II, III, Universal, or the Section 609 detour.
Study the matching sections
Core is paired with the technical type you need.
Run a section-balanced practice test
Results show which section is below the target.
Use an EPA-approved certifying organization
Confirm delivery method, proctoring, price, score timing, and card delivery.