HVAC Study Guides for Working Technicians
Six short guides covering what HVACR technicians are expected to know: refrigeration, electrical, airflow, safety and regulations, heat pumps and gas heating. Read them here, then test yourself.
The Refrigeration Cycle
The refrigeration cycle, superheat and subcooling, metering devices, refrigerants, charging and recovery, written for working HVACR technicians.
8 lessons · 6-9 minElectrical Troubleshooting
Multimeters, wiring diagrams, capacitors, contactors, transformers and sequence of operation for HVAC electrical troubleshooting.
8 lessons · 7-10 minHVAC Airflow Principles
Delta T, CFM, static pressure, duct basics, psychrometrics and filters: the airflow knowledge HVAC technicians are tested on.
8 lessons · 6-9 minRegulatory & Jobsite Safety Knowledge
EPA 608 rules, refrigerant recovery regulations, OSHA basics, PPE, ladders and A2L refrigerant safety for HVACR technicians.
8 lessons · 7-10 minHeat Pumps & Reversing Valves
How heat pumps work, reversing valves, defrost, auxiliary heat and common heat pump diagnostics.
8 lessons · 5-8 minGas Heating & Combustion Safety
Gas furnace sequence of operation, ignition, flame sensing, gas pressure, venting and combustion safety.
8 lessons · 6-9 minFree EPA 608 Practice Test
24 practice questions across Core, Type I, Type II and Type III, with an explanation for every answer. No account needed.
Start the practice testPass the Skill Ready Techs Competency Exam, get your EPA 608 card checked, and earn a verified card you can send to any employer. Free for technicians.