
C-20 HVAC Contractor Exam
PASS THE C-20 HVAC TRADE EXAM. IT’S EASY AS 123!
- Commit to passing your C-20 Warm-Air Heating, Ventilating & Air Conditioning Contractor exam. Prepare at HOME on your schedule: “Read, Listen, Watch, Learn, & PASS!”
- Apply to the CSLB. We help you correctly fill out your C-20 Contractor License Application! Call us for assistance.
- Study. Our clients typically pass the exam on their 1st attempt! “Follow the plan & pass your exam!”
All qualifying individuals must also pass the California Contractor Law & Business Exam (sold separately below)
$249.00

Pass your Ca, C-20 Warm Air Heating, Ventilating, and Air Conditioning exam; it’s as simple as 123!
ONE – Commit to passing your C-20 Contractor exam. Study at HOME and on your schedule.
- Read our best in the industry C-20 exam preparation manual.
- Learn the art of dominating a four-answer multiple-choice exam.
- Engage with audio and video content featuring industry experts discussing construction math and Title 8 Health and Safety Rules.
- Access hundreds of researched exam questions and answers.
- Memorize key exam concepts with virtual flashcards and take non-graded practice quizzes.
- Verify your knowledge with full-length, timed tests that simulate the actual exam.
- PASS your C-20 HVAC Contractor exam the first time you test.
Study Online! Our multimedia contractor course is the best and most affordable way to pass your C-20 Contractor Trade Exam!
The most effective contractors’ license course available in California at ANY price!
TWO: Apply to the CSLB. We will help! New online tools help fill out your application. Call us for assistance, and schedule a free line-by-line review of your application before submission to the CSLB!
With our help, submitting a proper C-20 HVAC Contractor License application to the CSLB has never been easier!
THREE: Prepare for and pass your exam. Our students dramatically improve their test scores and pass their contractors’ license exams.
When ready to test, schedule your exam through PSI. Please read the PSI Candidate Information Bulletin for more information. PSI – C-20 Warm Air Heating Ventilating and Air Conditioning
IT’s A FACT! When you read something – eTEXTBOOKS, watch something – VIDEO FILES, hear something – AUDIO FILES, and then put that information to use – ONLINE PRACTICE QUESTIONS & ONLINE EXAMS, your ability to retain our study materials increases exponentially!

CALIFORNIA C-20 HEATING, VENTILATION, & AIR CONDITIONING CONTRACTOR (TRADE EXAM)
Choose your course format from either
eCourse – Online Manual (not printable), Online A/V (Audio/Video), & Online Testing
Or Printed Manual + Online A/V (Audio/Video) & Online Testing
Or Printed Manual + CDs, DVD’s, & Online Testing
Our C-20 HVAC License, Trade Exam Course includes the following materials to maximize your study efforts.
- Trade Specific Textbooks
- Audio Lectures
- Video Lectures
- Online Practice Questions
- Simulated Online Exams
- Business Building Tools
CALIFORNIA C-20 HVAC LICENSE EXAM MANUAL
The C-20 HVAC contractor exam manual briefly covers important State exam of topics, including Properties of Air & Water, Psychrometric Charts, Basic HVAC Formulas, Basic Electrical Formulas, Electrical & Insulating Materials, Soldering & Brazing, Electric Motors, Fuels & Refrigerants, Mechanical Refrigeration, Solar Energy, Plan & Circuit Symbols, summaries of the California Mechanical Code, and Title 8 Health & Safety Orders.
The C-20 HVAC Contractor Study Guide contains the following sections;
- GENERAL KNOWLEDGE: This contains basic trade information all students must know to pass the C-20 Trade exam.
- MATH REVIEW: The Math Review Lecture covers math and estimating formulas, measurement units, basic geometry, and the architect’s scale.
- HEALTH AND SAFETY: Our comprehensive health and safety section familiarizes students with Title 8 and other regulations and practices.
- REVIEW QUESTIONS: Lists the most difficult questions, indexed to the relevant section of the manual.
AUDIO/VIDEO LECTURES
- Expert instructors with decades of related trade experience cover key C-20 HVAC contractor exam concepts in greater detail. Our A/V lectures include math formulas, C-20 General Knowledge & Review Question lecture, and Title 8 Health & Safety Orders.
THE LATEST ONLINE C-20 HVAC STUDY QUESTIONS AND SIMULATED FINAL EXAMS
- VIRTUAL FLASHCARDS: online flashcards. Our program tracks your history and also allows you to exclude questions you have already learned.
- PRACTICE EXAMS: Four final practice exams, each timed to simulate actual exam conditions. The course also includes two Title 8 Health & Safety tests. (Exams are approximately 120 questions each.) Our Health and Safety update lists any new questions to reflect changing trends in exam focus.
ASSISTANCE FILLING OUT THE APPLICATION
- Get help filling out your contractor exam application or request a free review of your completed form before submission. All students in our C-20 HVAC course can call us at (866) 685 8564 for assistance.
ONE YEAR UNLIMITED ACCESS: To All Online eBooks, Audio/Video, Test Questions & Simulated Final Exams.
We provide complete access to all online course materials for an entire year. Other schools may offer only 90-day access to online tools in the hopes of charging you extra $ for extended access to study materials.


THE C-20 HVAC EXAM CONTAINS FOUR MAJOR SECTIONS:
Section 1. Planning and Estimation – 25% of C-20 Exam
- HVAC system design and evaluation
- Load and psychrometric calculations
- Duct system design and layout
- Job cost estimation
Section 2. Fabrication, Installation, and Startup – 29% of C-20 Exam
- Duct system fabrication
- Equipment installation
- Electrical and mechanical components
- Plumbing and refrigeration components
- Air distribution and duct systems
- HVAC system startup
Section 3. Troubleshooting, Repair, and Maintenance – 24% of C-20 Exam
- HVAC system diagnostic tests and evaluation
- HVAC system maintenance or repair
Section 4. Safety – 22% of C-20 Exam
- Personal protective equipment (PPE)
- Job site safety requirements (Cal/OSHA)
- Handling hazardous materials
*Percentages are approximate
C-20 HVAC Warm Air Heating Ventilation & Air Conditioning exam source material:
The CSLB utilizes the following publications to create the Warm Air Heating, Ventilating, and Air-Conditioning (HVAC) exam. California codebooks are available online: www.bsc.ca.gov
2022 Building Energy Efficiency Standards for Residential and Nonresidential Buildings. California Energy Commission.
PHONE: (800) 772-3300
INTERNET:www.energy.ca.gov/title24/2008standards
2022 California Building Code. Title 24. International Code Council.
PHONE: (800) 786-4452.
INTERNET: http://www.iccsafe.org
2022 California Electrical Code. California Code of Regulations, Title 24. BNI Publications, Inc.
PHONE: (888) 264-2665
INTERNET: www.bnibooks.com
2022 California Energy Code. California Code of Regulations, Title 24. International Code Council.
PHONE: (800) 786-4452
INTERNET: www.iccsafe.org
2022 California Mechanical Code. Title 24. International Association of Plumbing and Mechanical Officials (IAPMO).
PHONE: (800) 854-2766.
INTERNET: http://www.iapmo.org
2022 California Plumbing Code. Title 24. International Association of Plumbing and Mechanical Officials (IAPMO).
PHONE: (800) 854-2766.
INTERNET: http://www.iapmo.org
ASHRAE Handbooks (Fundamentals; HVAC Systems and Equipment; HVAC Applications; and Pocket Guide). ASHRAE.
PHONE: (800) 527-4723
INTERNET: www.ashrae.org
HVAC Duct Construction Standards – Metal and Flexible. Sheet Metal and Air Conditioning Contractors’ National Association.
PHONE: (800) 886-2653
INTERNET: www.smacna.org
– Manual CS – Commercial Applications, Systems, and Equipment.
– Manual D – Residential Duct Systems.
– Manual H – Heat Pump Systems.
– Manual J – Residential Load Calculation.
– Manual N – Commercial Load Calculation.
– Manual P – Psychrometrics.
– Manual Q – Commercial Duct Design.
– Manual RS – Comfort, Air Quality, and Efficiency by Design.
– Manual S – Residential Equipment Selection.
Air Conditioning Contractors of America.
PHONE: (888) 290-2220
INTERNET: www.acca.org/home
Modern Refrigeration & Air Conditioning Technology; Johnson, B., Silberstein, E., Tomczyk, J., Whitman, B. Cengage Learning.
PHONE: (800) 354-9706
INTERNET: www.cengage.com
State of California General Industry & Electrical Safety Orders (Cal/OSHA) and State of California Construction & Electrical Safety Orders (Cal/OSHA). 2023. California Code of Regulations, Title 8. Mancomm.
PHONE: (877) 626-2666
INTERNET: www.mancomm.com
*Publisher information is current as of 1/23
Official CSLB Description of Duties for a C-20 HVAC Contractor.
California Code of Regulations Title 16, Division 8, Article 3. Classifications
A warm-air heating, ventilating, and air-conditioning contractor fabricates, installs, maintains, services, and repairs warm-air heating systems and water heating heat pumps, complete with warm-air appliances; ventilating systems complete with blowers and plenum chambers; air-conditioning systems complete with air-conditioning unit; and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with any of these systems. This classification shall include warm-air heating, ventilating, and air-conditioning systems which utilize solar energy.
Authority cited: Sections 7008 and 7059, Reference: Sections 7058 and 7059 (Business and Professions Code)


Pass the Law & Business Exam
📚 Pass the Law & Business Exam for Your Original Contractor’s License
- Law & Business Exam Focus: This exam concentrates on California Contractor Law and best business practices.
- Path to Success: To qualify for your first contractor’s license, you must pass both the TRADE and LAW exams. Utilize our resources to “Read, Watch, Listen, Learn, and PASS!”
Prepare for both exams to ensure you meet all the requirements for your original contractor’s license. With the right resources and study habits, you’re on your way to becoming a licensed contractor.
$199.50

Call us at 866-685-8564 for a free licensing consultation.