HVAC Advanced — EPA 608 + NATE Prep
EPA 608 Universal prep, NATE heat-pump depth, combustion analysis, business economics — 4 lessons.
Start Lesson 014 lessons in order
EPA 608 Certification — Universal Prep
EPA 608 is the federal license to handle refrigerants. Without it, you cannot legally service AC. This lesson covers all four type tests (Core, Type I, Type II, Type III) and the questions that show up most.
NATE Certification & Heat Pump Deep Diagnostics
NATE (North American Technician Excellence) is the gold-standard HVAC cert. Heat pumps are the test's heaviest section and the field's fastest-growing tech. This lesson covers reversing valves, defrost cycles, and dual-fuel logic.
Combustion Analysis & Gas Furnace Tuning
Combustion analysis is the difference between a tech and a professional. This lesson covers analyzer setup, the CO/CO2/O2 numbers that prove safe operation, and the tuning approach that prevents the call that ends with a fatality.
HVAC Business: Estimating, Margins, & Crew Management
Most HVAC techs go independent within 5 years. This lesson covers what they don't teach in trade school: pricing replacement systems, gross margin targets, financing, and managing install crews.