New Hampshire HVAC License Requirements

New Hampshire does not list a general statewide HVACR contractor, journeyman-HVAC, or master-HVAC license. Instead, the Mechanical Licensing Board regulates fuel-gas work through specialty credentials: Fuel Gas Piping Installer, Fuel Gas Installation Technician, Fuel Gas Service Technician, Domestic Appliance Technician, and Hearth System Installation and Service Technician. Choose the specialty that covers the fuel-gas portion of the HVAC work; heating-oil certification is voluntary under RSA 153:16-b. Refrigerant work remains subject to federal EPA Section 608 requirements, and local mechanical permits and adopted codes still apply.

Regulatory Body

New Hampshire Mechanical Licensing Board (OPLC) administers and enforces this credential under the authority of RSA 153:16-b, 153:27–36; Mec rules. The Board licenses New Hampshire fuel-gas-fitter specialties and mechanical business entities; it also administers voluntary oil-heating certification.

Official portal: https://www.oplc.nh.gov/
Address: 7 Eagle Square, Concord, NH 03301
Phone: (603) 271-2152

Eligibility Requirements

This guide does not establish a minimum applicant age; confirm any age requirement with the issuing authority. Check the current application for identification and tax-number requirements. The current Mechanical Licensing Board rules reviewed do not state a New Hampshire-residency prerequisite. A business entity performing fuel gas fitting must meet the Board’s entity, good-standing, and liability-insurance requirements.

Good moral character

Fuel-gas applicants must meet the Board’s application and competency requirements. Applicants with specified criminal history must provide current criminal-record checks and supporting information.

Background investigation

A felony, offense against another person, or offense involving dishonesty after reaching majority triggers current criminal-record checks from New Hampshire and each state where the applicant has criminal history; the rules reviewed do not describe universal fingerprinting for every applicant.

Experience and Education

Plan to substantiate 1 year of There is no Journeyman-to-Master Gas Fitter ladder. The credential is specialty-based. For example, a Fuel Gas Installation Technician needs at least 100 hours of specified training and 1,000 relevant hours within 60 consecutive months; a Fuel Gas Service Technician needs 140 training hours and 2,000 relevant hours within 60 consecutive months. A Fuel Gas Piping Installer is for eligible New Hampshire plumbers and requires at least 60 hours of specified gas training. with hard records. Payroll, tax, project logs, and supervisor verification are what the board relies on when it reviews the claim.

Accepted proof of experience or eligibility

Current trainee or fuel-gas license, or applicable out-of-state licensure evidence
Proof of Board-approved education or training
Sworn affidavit from the licensed fuel-gas employer and sponsor verifying relevant field hours
Signed supervising, sponsoring, or directing fuel-gas-fitter letter addressing competency
EPA Section 608 certification for personnel who service regulated refrigerants

Education substitution

The Board allows relevant approved educational-setting experience in the specialty rules, subject to the stated limits. For example, fuel-gas-service applicants need 2,000 relevant hours, with up to 750 hours of relevant heating-oil appliance experience permitted under the rule; do not substitute generic HVAC schooling without Board confirmation.

Exam Requirements

The examination requirement has not been established in this record. Confirm it with the authority before applying. Provider or process notes: New Hampshire Mechanical Licensing Board / OPLC

Examination fee: Use the current OPLC Mechanical Licensing Board fee rule and application packet for the selected fuel-gas specialty. The current rule expressly lists $90 examinations for plumbing-apprentice bypass, Journeyman Plumber, and Master Plumber examinations; it does not list a universal fuel-gas-specialty examination fee in that provision.

Retake policy: Follow the selected specialty’s current Board application instructions. Individual mechanical licenses expire every two years; an expired license may be reinstated within one year by meeting renewal requirements, after which initial licensure is required again.

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

The reviewed rules do not state an individual fuel-gas-fitter liability-insurance minimum. A mechanical business entity must provide proof of liability insurance before issuance and renewal.

Workers' compensation

Workers’ compensation obligations are separate from the individual fuel-gas license. Confirm current employer obligations before hiring employees.

Additional financial requirements

The reviewed fuel-gas and business-entity provisions do not identify a general financial-statement or surety-bond requirement.

Fee Schedule

Fee	Amount
Application	No separate amount recorded; confirm in the fee guidance
Initial license	No separate amount recorded; confirm in the fee guidance
Renewal (every 2 years)	No separate amount recorded; confirm in the fee guidance

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 New Hampshire hvac.

Renewal and Continuing Education

Expect to renew the New Hampshire Fuel Gas Fitter Specialty License (HVAC gas work) every 2 years. The cited materials name no distinct statewide fee for renewal. Individual fuel-gas endorsements expire every two years on the last day of the issue month. The separate mechanical business entity license is also biennial; confirm the current selected-specialty fee in OPLC’s fee rule before applying or renewing.

Continuing education: Individual mechanical licensees must complete at least six hours of Board-approved continuing education for each plumbing or fuel-gas endorsement in every two-year cycle. Board-approved seminars are at least three contact hours and cover applicable New Hampshire-adopted codes, laws, and rules.

Downloadable Asset

2026 New Hampshire HVAC License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity

New Hampshire does not accept the NASCLA Accredited Examination for this classification.

Reciprocal State	Accepted Exam	Conditions
No formal bilateral reciprocity agreements identified.

New Hampshire uses an endorsement framework for substantially similar out-of-state mechanical licenses. The other jurisdiction must use the same or later New Hampshire building-code and fire-code editions and meet the rule-specified equivalent training and experience for the specialty; confirm eligibility with OPLC before relying on it.

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 New Hampshire's requirements against the bordering jurisdictions before committing to an application:

Maine HVAC License Requirements — Maine HVAC Contractor Requirements (No General State License; Fuel Board Credentials for Fuel Equipment)
Massachusetts HVAC License Requirements — Massachusetts HVAC — Refrigeration, Sheet Metal, Gas, Plumbing, and Oil-Burner Credentials
Vermont HVAC License Requirements — Vermont HVAC Requirements (No General State HVAC License)

Step-by-Step Application Roadmap

Identify every regulated part of the HVAC scope. New Hampshire does not have a general HVACR license. Identify fuel-gas, refrigerant, oil-heating, electrical, and local-permit work before choosing credentials.
Choose the correct fuel-gas specialty. Installation Technicians install gas appliances and equipment; Service Technicians service and repair gas equipment; Piping Installers are an eligible-plumber path for gas piping. Do not work beyond the specialty’s scope.
Register as a Fuel Gas Trainee when training. A trainee must be sponsored and directly supervised by a licensed New Hampshire fuel gas fitter while completing training and experience.
Complete the specialty-specific training and hours. Installation requires 100 training hours and 1,000 relevant hours; Service requires 140 training hours and 2,000 relevant hours, subject to the rules’ defined time period and experience limits.
Submit Board evidence of training, experience, and competence. Provide education proof, employer/sponsor sworn affidavit of hours, and the required licensed-fitter competence letter.
License the business entity when providing fuel-gas work. A corporation, partnership, LLC, sole proprietor, or LLP performing fuel-gas fitting needs a mechanical business entity license, appropriate licensee of record, good standing, and liability insurance.
Meet EPA and local project requirements. EPA Section 608 applies to personnel servicing regulated refrigerants. Obtain municipal permits and inspections and follow the applicable state-adopted codes.
Renew biennially with the required CE. Individual endorsements renew every two years and generally require at least six Board-approved CE hours for each plumbing or fuel-gas endorsement.

Application Checklist

The items below are the ones worth confirming before the application is filed with OPLC:

Scope analysis: fuel gas, refrigerants, oil heat, electrical, and local permits
Correct fuel-gas specialty selection
Fuel Gas Trainee registration and sponsor, if training
Specialty-specific Board-approved education and documented field hours
Employer/sponsor sworn affidavit and licensed-fitter competence letter
Mechanical business entity license, liability insurance, and licensee of record if operating a fuel-gas business
EPA Section 608 compliance for any regulated refrigerant work
Municipal permit, inspection, and code confirmation

Common Filing Mistakes

Drawn from the board instructions and sources cited on this page, the pitfalls below are the ones most likely to slow down or sink a New Hampshire HVAC application.

Looking for a nonexistent Master Gas Fitter credential

New Hampshire uses Fuel Gas Piping Installer, Installation Technician, Service Technician, Domestic Appliance Technician, and Hearth System specialties—not a Journeyman-to-Master Gas Fitter ladder.

Using one specialty outside its scope

Installation, service, piping, hearth, and domestic-appliance credentials have different scopes and requirements. Select the specialty for the actual work.

Treating general HVAC experience as automatically qualifying

The Board’s fuel-gas routes specify gas training and relevant field experience. Generic HVAC schooling or hours are not a blanket substitute.

Skipping the business entity license

Sole proprietors and other entities that perform fuel-gas fitting need the separate mechanical business entity license, licensee of record, and liability insurance.

Confusing state fuel-gas licensing with refrigerant certification

EPA Section 608 is a separate federal credential for regulated refrigerants; it does not replace the applicable New Hampshire fuel-gas specialty license or local permits.

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.

Mec 300 initial fuel gas fitting rules — New Hampshire Mechanical Licensing Board. Primary specialty scope, education, experience, and supporting-document requirements.
Mec 400 renewal and continuing education rules — New Hampshire Mechanical Licensing Board. Biennial renewal and six-hour-per-endorsement CE requirement.
EPA Section 608 certification — U.S. Environmental Protection Agency. Federal refrigerant-handling requirements.

Other New Hampshire Trade Licenses

CLR covers other New Hampshire trades as well — the published guides below may be more relevant:

Frequently Asked Questions

Does New Hampshire have a general statewide HVAC license?

No general statewide HVACR, journeyman-HVAC, or master-HVAC license appears in the current Mechanical Licensing Board license categories. Fuel-gas portions of HVAC work require the applicable specialty license, while permits and other trade requirements remain project-specific.

Which New Hampshire license covers a gas furnace installation?

The Fuel Gas Installation Technician specialty covers installation of natural-gas and propane appliances and related equipment. Confirm all portions of the planned scope against the current specialty rule and obtain other required trade credentials.

Which credential covers gas-furnace service?

The Fuel Gas Service Technician specialty covers servicing and repair of specified natural-gas and propane piping, heating equipment, and water-heating equipment. It requires 140 hours of training and 2,000 relevant hours under the current rule.

Do HVAC technicians need EPA Section 608 in New Hampshire?

Federal EPA Section 608 certification is required for technicians who service regulated refrigerants. It is separate from New Hampshire fuel-gas licensing.

Does an HVAC company need a New Hampshire business license from the Mechanical Licensing Board?

A business entity performing fuel gas fitting needs the mechanical business entity license, an appropriate active individual licensee of record, good standing with the Secretary of State where applicable, and liability insurance. Confirm other HVAC business obligations locally.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-09-04 · Next scheduled review 2026-12-04

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Corrections and presentation updates

2026-09-30: Corrected examination detection when format details are unpublished and updated the summary layout and requirements score. Source-check dates are unchanged.
2026-09-08: Shared template updated to distinguish unspecified eligibility requirements, retain cost qualifications, and use consistent headings. Source-check dates are unchanged by presentation updates.
2026-09-21: Local-only guides now use a compliance-focused structure and terminology instead of implying a statewide license application. Source-check dates are unchanged by this presentation update.