Maryland HVAC License Requirements (2026)

The Maryland State Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors licenses HVACR workers statewide as apprentices, journeymen, master contractors, master restricted contractors, and limited contractors. A full Master HVACR Contractor may install, maintain, alter, remodel, or repair heating, ventilation, air-conditioning, refrigeration, and hydronic systems. The current Board requirements for the full master license are a current journey-or-higher credential, three years of active full-scope HVACR work under a master, at least 1,875 hours in the year before applying, and a 70% master examination score. The Board’s current journeyman route requires four years as an apprentice and 6,000 supervised training hours. Local permits and any local credential remain separate project requirements.

Regulatory Body

Maryland State Board of HVACR Contractors — Department of Labor (Maryland HVACR Board) administers and enforces this credential under the authority of Md. Code, Business Regulation Title 9A; COMAR 09.15. Licenses and regulates individuals providing residential and commercial HVACR services, including contractor classifications and discipline.

• Official portal: https://www.labor.maryland.gov/license/hvacr/
• Address: 100 S. Charles Street, Tower I, Baltimore, MD 21201
• Phone: (410) 230-6196

Eligibility Requirements

Applicants must be at least 18 years old. Applicants must provide a Social Security Number. No Maryland residency requirement.

Good moral character

Disclose information requested in the current application. The Board may investigate and discipline applicants or licensees under the HVACR statute; do not assume a conviction produces an automatic result without Board review.

Background investigation

Use the Board and PSI application instructions for current eligibility documents. The published HVACR requirements do not describe a universal fingerprint prerequisite for the master license.

Experience and Education

Eligibility requires 7 years of the current standard path requires four years as a licensed apprentice and 6,000 supervised HVACR training hours for the journey license, then three years of active full-scope HVACR work as a journeyman (or higher qualifying credential) under a master, including 1,875 hours in the year before the master application, documented and independently verifiable. Payroll, tax, project, and supervisor records are the usual proof the board will accept.

Accepted proof of experience or eligibility

• PSI application and documents proving the required apprentice/journey license history and qualifying HVACR experience
• Supervised training evidence for the journey route (current Board page: four apprentice years and 6,000 hours)
• Evidence of at least 1,875 HVACR hours in the year before the master application
• Approved Maryland Apprenticeship and Training Council completion records when using that separate journey pathway

Education substitution

A person completing an approved Maryland Apprenticeship and Training Council HVACR program may be issued a journey license without the journey examination. Use the Board/PSI instructions to confirm eligibility; do not assume ordinary school coursework substitutes for master-level experience.

Exam Requirements

Testing provider or authority: PSI Services LLC (under contract to BHVACR). The following examination requirements cover the pathways described in this guide; follow each part's classification, waiver, and local-scope conditions. Unpublished format details do not remove an examination requirement:

• Maryland Master HVACR Contractor examination — 100 questions, 240 minutes, passing score 70%

Examination fee: $150 for the Master Contractor examination, paid to PSI.

Retake policy: PSI lists the examination fee as nonrefundable and nontransferable, valid for 90 days. Re-register and pay the current fee after a failed or forfeited appointment.

Insurance and Bonds

The cited state source set does not require a contractor license surety bond for this credential. Contractors should still confirm project-specific bond, permit-bond, or public-works bond requirements before bidding.

General liability

Master contractors who sign or approve HVACR contracts must carry at least $300,000 general liability and $100,000 property-damage coverage, at least $400,000 combined. The certificate must name the licensee and the Board as certificate holder and show the policy number and expiration date.

Workers' compensation

Workers’ compensation is a separate Maryland employment-law question. Confirm coverage or any valid exemption for the business; it is distinct from the Board’s required contracting insurance.

Additional financial requirements

No formal net worth requirement.

Fee Schedule

To turn these board fees into a realistic year-one budget — bond premium, liability insurance, and exam prep included — open the cost calculator preloaded for Maryland hvac.

Renewal and Continuing Education

Renewal of the Maryland Master HVACR Contractor comes due every 2 years. As cited, the renewal fee stands at $94.50. A Maryland HVACR license expires on the first October 1 in an odd-numbered year unless renewed for two years. The renewal statute requires the application, fee, and insurance proof required for the active credential; it does not state a general continuing-education condition. A contracting licensee cannot continue entering HVACR contracts after required insurance expires.

Reciprocity

The NASCLA Accredited Examination is not accepted by Maryland for this classification.

Do not rely on a general claim of automatic reciprocity. The Board’s 2026 minutes described a District of Columbia agreement as still under review; use the current reciprocal application and Board confirmation for any out-of-state path.

Weighing more than one jurisdiction? The national hub compares published HVAC license requirements by state — exam, bond, fee, and experience thresholds side by side.

HVAC Licensing in Neighboring States

Contractors working near a state line, or weighing where to qualify first, should compare Maryland's requirements against the bordering jurisdictions before committing to an application:

• Delaware HVAC License Requirements — Delaware Master HVACR / Master HVACR Restricted License
• District of Columbia HVAC License Requirements — DC Refrigeration and Air-Conditioning Mechanic License
• Pennsylvania HVAC License Requirements — Pennsylvania HVAC — Local Licensing; No Statewide Trade License
• Virginia HVAC License Requirements — Virginia Master HVAC Tradesman License
• West Virginia HVAC License Requirements — West Virginia HVAC Technician License (Residential and Commercial)

Step-by-Step Application Roadmap

1. Start with the appropriate apprentice route. For the current standard journey route, hold the Maryland apprentice license for four years and complete 6,000 supervised HVACR hours. An approved Maryland Apprenticeship and Training Council program has its own journey path.
2. Qualify for and obtain the journey credential. Use PSI’s current application process and provide the Board-required proof. The current Board page requires a 70% journey examination score for the standard route.
3. Complete three years of qualifying master-level experience. Hold a journey-or-higher qualifying credential and work regularly and principally across all HVACR areas under a master for at least three years, including 1,875 hours in the year before applying.
4. Apply to PSI and pass the master examination. PSI reviews eligibility documents. The current Master Contractor examination has 100 questions, a 70% passing score, a 240-minute time limit, and a $150 fee.
5. Complete Board licensing and insurance steps. After passing, follow the Board’s original-license instructions. A master who signs or approves contracts needs the required general-liability and property-damage insurance.
6. Meet local permit and advertising requirements. Obtain the project’s required local permits. Owner-operators and designated responsible contractors must display their Maryland HVACR number on vehicles, contracts, and advertising as the current Board material requires.

Application Checklist

These are the pieces to lock down before filing with Maryland HVACR Board:

• Apprentice and journey-or-higher Maryland HVACR license history
• Evidence of the applicable journey route (current standard route: four apprentice years and 6,000 supervised hours)
• Three years of qualifying full-scope HVACR experience under a master
• Evidence of at least 1,875 HVACR hours in the year before the master application
• PSI Master Contractor exam pass result (70% or higher)
• Board original-license application and current $94.50 Master fee
• $300,000 general liability plus $100,000 property-damage insurance certificate when signing/approving contracts

Progress is saved in this browser, so you can return to this checklist while your application is in flight.

Common Filing Mistakes

Based on the board's own instructions and the sources cited here, the problems below are what most often stall a Maryland HVAC application.

Skipping apprentice registration

The current standard journey route requires four apprentice years and 6,000 supervised hours. Preserve the license and work records PSI requires before applying for the journey examination.

Confusing Master with Master Restricted

Master Restricted is limited to selected specialties, while Limited Contractor status is maintenance/repair only and does not authorize installations or retrofits. Match the license to the work actually contracted.

Allowing the liability insurance to lapse

A contractor who signs or approves contracts needs $300,000 general liability plus $100,000 property-damage coverage. The Board says a licensee whose required insurance expires cannot legally continue to enter HVACR contracts.

Underestimating refrigeration content

The full master classification covers heating, ventilation, air conditioning, refrigeration, and hydronic systems. Use PSI’s current candidate bulletin rather than an older generic mechanical-exam outline.

Treating state licensure as the only project approval

The Maryland credential is statewide, but local permits and project requirements still apply. Confirm the authority having jurisdiction before contracting or pulling a permit.

Study and Reference Materials

What follows are the regulator-cited and commonly used preparation references for this trade. They appear here for convenience only; CLR takes no compensation for them.

• PSI Maryland HVACR Candidate Information Bulletin — PSI / Maryland State Board of HVACR Contractors. Official source for the master exam format, fee, approved eligibility documents, references, and scheduling.
• Maryland HVACR Board licensing and insurance requirements — Maryland Department of Labor. Use for the current experience route, master classifications, insurance, and license renewal framework.
• Md. Code, Business Regulation §9A-101 et seq. and COMAR 09.31 — State of Maryland. Licensing law and rules.

Other Maryland Trade Licenses

If the HVAC license is not the right fit, the following published Maryland trade guides are also covered by CLR:

• Maryland General Contractor License Requirements
• Maryland Electrician License Requirements
• Maryland Plumber License Requirements
• Maryland Roofing Contractor License Requirements
• Maryland Painting Contractor License Requirements
• Maryland Landscaping Contractor License Requirements
• Maryland Masonry Contractor License Requirements
• Maryland Concrete Contractor License Requirements
• Maryland Carpentry Contractor License Requirements
• Maryland Solar Installer License Requirements
• Maryland Low-Voltage Technician License Requirements
• Maryland Fire Sprinkler Contractor License Requirements
• Maryland Home Inspector License Requirements
• Maryland Pool Contractor License Requirements
• Maryland Handyman License Requirements
• Maryland Pest Control License Requirements
• Maryland Septic Contractor License Requirements

Frequently Asked Questions

What are the Maryland HVACR license tiers?

Maryland issues apprentice, journeyman, journeyman restricted, master, master restricted, and limited HVACR contractor licenses. A full master is the broad all-systems classification; master restricted licenses cover selected specialties, while a limited contractor may maintain or repair but not install or retrofit HVACR systems.

How many years of experience does Maryland require for a Master HVACR Contractor?

The current Board page requires a master applicant to hold a journey-or-higher qualifying credential, have three years of active full-scope HVACR experience under a master, and have worked at least 1,875 hours in the year before applying. The current standard journey path itself requires four apprentice years and 6,000 supervised hours.

What is the Master Restricted HVACR license?

A Master Restricted Contractor is authorized only in one or more listed specialties: forced-air heating, hydronic heating, combined heating, ventilation, air conditioning, or refrigeration. It is not a residential-only license. Select the full master classification when the business needs all HVACR scope.

Does Maryland reciprocate Master HVACR licenses?

Maryland Board material identifies Virginia and Delaware as existing HVACR reciprocity partners, but eligibility depends on the exact credential, examination history, and current reciprocal application. The Board’s April 2026 minutes said a District of Columbia agreement was still under review. Confirm the current process directly with the Board before relying on reciprocity.

How often does the Maryland Master HVACR license renew?

Licenses renew for two years and expire on the first October 1 in an odd-numbered year. Renew with the Board’s application, fee, and insurance proof when required for the active contractor credential. A license may generally be restored within four years; later restoration can require the initial-licensing process.

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