Free MD HVAC Exam Prep
Maryland HVACR Contractor License
Prepare for the MD HVAC exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
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Maryland HVAC Contractor License License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
Maryland HVACR Law, Licensing & Administrative RulesYou are here
Review Title 9A, COMAR 09.15, license classifications, separate liability coverage minimums, vehicle advertising, and Board enforcement.
Electrical Circuits, Motor Controls & Schematics
Study Ohm's law, 24VAC control transformers, ladder diagrams, PSC/ECM motor troubleshooting, and electrical safety controls.
Refrigeration Cycle, EPA 608 & AC System Design
Master thermodynamics, ASHRAE refrigerants, ACCA Manual J/S sizing, TXVs, subcooling/superheat charging, and recovery rules.
Heating Systems, Combustion Science, Hydronics & Venting
Learn gas furnace sequence, IFGC combustion air, Category I-IV venting, ASME Section IV boilers, and oil burner systems.
Air Distribution, Manual D & OSHA Construction Safety
Calculate friction rate, size ductwork with ACCA Manual D, verify fire dampers, and review OSHA 29 CFR 1926 standards.
Free MD HVAC Prep Tools
Free Practice Questions
Maryland-specific questions on HVACR licensing, heating, cooling, refrigeration, and safety
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2026 Updated
Reflects current Maryland HVACR Board regulations and PSI exam content
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What You'll Study
12 chapters covering the exam topics in this guide
Chapter 1: Maryland HVACR Licensing Framework & Board Jurisprudence
4 sections
Chapter 2: Electrical Fundamentals, Circuits & Schematics
4 sections
Chapter 3: Electric Motors & HVACR Control Devices
3 sections
Chapter 4: Piping Systems, Materials & Code Installation Standards
4 sections
Chapter 5: Piping Testing, Hydronic Loop Design & Commissioning
3 sections
Chapter 6: Thermodynamics, Psychrometrics & The Refrigeration Cycle
4 sections
Chapter 7: Refrigerants, Environmental Regulations & EPA Section 608
4 sections
Chapter 8: Air Conditioning & Heat Pump Systems
4 sections
Chapter 9: Gas Heating Systems, Combustion Science & Venting
4 sections
Chapter 10: Boilers, Hydronic Heating & Oil-Fired Systems
3 sections
Chapter 11: Air Distribution Systems, Duct Design & Ventilation
4 sections
Chapter 12: Testing, Air Balancing & Construction Safety
3 sections
MD HVAC Exam Details
Maryland HVACR Contractor License
Administered by Maryland Board of HVACR Contractors
Exam Content Breakdown
Based on the official Maryland Board of HVACR Contractors content outline
AC/DC circuits, electric motors, control circuits, contactors, and safety controls
Piping materials, brazing, soldering, hangers and supports, valves, insulation, and testing
Thermodynamics, refrigerants, load sizing, components, equipment installation, and servicing
Combustion science, gas furnaces, boilers, hydronics, venting, and fuel oil systems
Duct sizing, Manual D, duct materials, hangers, fire/smoke dampers, and exhaust hoods
OSHA 1926 jobsite safety, PPE, hazard communication, scaffolds, ladders, excavations, and fall protection
What's Included
12 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
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No credit card required
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What's Next After the MD HVAC?
After passing the MD HVAC, you can pursue these career paths
Licensed Master HVACR Contractor
Operate an independent HVACR contracting business in Maryland, obtain local mechanical permits, and supervise journeymen and apprentices across the full HVACR scope.
Commercial Mechanical Project Manager
Direct large-scale commercial mechanical installations, oversee hydronic and chilled water piping, and coordinate ACCA engineering submittals.
HVACR Facilities Maintenance Director
Manage central plant heating, ventilation, and refrigeration infrastructure for institutional, hospital, and university campuses throughout Maryland.
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