100+ Free NC HVAC Practice Questions
Pass your North Carolina HVAC Contractor License (Heating/Refrigeration) exam on the first try — instant access, no signup required.
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Key Facts: NC HVAC Exam
70%
Passing Score (Both Exams)
NC Heating/Refrigeration Boards
4,000 hrs
Experience Required
NC Board
H1/H2/H3
Heating License Groups
NC Board
Annual
License Renewal
Expires Dec 31
100 Q
Practice Questions Available
OpenExamPrep
About the NC HVAC Exam
North Carolina HVAC licensing requires passing a technical exam and a business and law exam. Heating licenses are classified as H1 (water-based systems), H2 (forced air over 15 tons), and H3 (forced air 15 tons or less), with Class 1 (any building) and Class 2 (single-family only). A separate Refrigeration license covers commercial refrigeration.
Questions
100 scored questions
Time Limit
4 hours (technical) + 90 minutes (business/law)
Passing Score
70% on each exam
Exam Fee
Varies by license type (NC Board of Plumbing, Heating & Fire Sprinkler / NC Board of Refrigeration Examiners)
NC HVAC Exam Content Outline
State Laws & Licensing
NC dual-board system, H1/H2/H3 classifications, Class 1/2, refrigeration board, experience, permits, and renewal
Heating & Cooling Systems
Heat pumps, furnaces, boilers, refrigerant handling, charging, defrost cycles, and system diagnostics
Ductwork & Air Distribution
Manual D duct design, air balancing, zoning, moisture management, crawl space considerations
Mechanical Codes & Energy
NC Mechanical Code (IMC-based), NC Energy Code, blower door testing, duct leakage testing, SEER2/HSPF2
Safety & Business
OSHA, EPA 608, gas safety, NC business/law exam topics, contracts, liens, and insurance
How to Pass the NC HVAC Exam
What You Need to Know
- Passing score: 70% on each exam
- Exam length: 100 questions
- Time limit: 4 hours (technical) + 90 minutes (business/law)
- Exam fee: Varies by license type
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
NC HVAC Study Tips from Top Performers
Frequently Asked Questions
What heating license do I need for residential HVAC work in North Carolina?
Most residential HVAC contractors need an H3 license (forced air systems 15 tons or less). H3 Class 2 limits you to single-family homes, while H3 Class 1 allows work in any building. H2 is needed for systems over 15 tons.
How do I qualify for an NC heating contractor license?
You need 4,000 hours of on-site experience (up to half may be academic credit), must pass a 4-hour technical exam and a 90-minute business/law exam (both 70%), and pass a background check.
Does NC require separate licenses for heating and refrigeration?
Yes. Heating/cooling is licensed by the Board of Plumbing, Heating & Fire Sprinkler Contractors. Commercial refrigeration is licensed by the separate Board of Refrigeration Examiners. Both require 4,000 hours experience.
How often must NC HVAC licenses be renewed?
Annually. All licenses expire December 31. Heating license renewal is $150/year, and refrigeration license renewal is $80/year.