New Hampshire HVAC License and the Four Gas Fitter Endorsements (2026)

New Hampshire does not issue an HVAC license, and no credential by that name appears anywhere on the Mechanical Licensing Board's published fee schedule. What the state licenses instead is fuel gas fitting: four gas fitter endorsements plus a separate domestic appliance license, each with its own classroom hours, field hours and scope. Air conditioning and refrigeration work that never touches a gas line is not a licensed trade here at all, while oil heat and water treatment certifications are voluntary.

Getting this wrong costs money in both directions. Companies put people through endorsements they do not need, and send others to jobs their endorsement does not cover. New to licensing here? Start with the New Hampshire contractor license requirements, and for every other state see how to get a contractor license in each state.

At a glance Issuer: the Mechanical Licensing Board inside the NH Office of Professional Licensure and Certification (OPLC), under RSA 153:27 to 153:38. What is licensed: fuel gas fitting (piping installer, installation technician, service technician, hearth) and domestic appliance work. No AC or refrigeration license. Hours: 40 to 140 classroom hours and 1,000 to 2,000 field hours earned within 60 consecutive months. Exam: at least 100 questions, pass mark 70 percent, taken through a board listed gas exam provider. Fees: $198 for a fuel gas fitter license and $275 for the Mechanical Business Entity license, each for 2 years.

Who Regulates Gas and Heating Work in New Hampshire

The Mechanical Licensing Board is a unit of the Office of Professional Licensure and Certification (OPLC) at 7 Eagle Square in Concord. The board is created by RSA 153:27-a, and RSA 153:27, I defines "board" as the mechanical licensing board. Some older guides still call it the Mechanical Safety and Licensing Board; the statute and the OPLC now use the shorter name.

The statute is RSA 153:27 through RSA 153:38. Several sections in that range are repealed: RSA 153:30, 153:32, 153:33, 153:37 and 153:38 were all repealed by 2023 Laws 79:303, effective September 1, 2023, when the OPLC's general licensing law in RSA 310 took over renewals and discipline. Any guide that still cites RSA 153:30 for renewal dates is quoting a repealed section, even though the board's own Mec 402.01(a) still carries that citation in its text.

The rules are the N.H. Code of Administrative Rules, Chapters Mec 100 to 800. They were re-prefixed from Saf-Mec to Mec by Document #13770, effective December 10, 2023. Key parts of the core licensing chapter, Mec 300, including the scope rules and the application rule, were readopted by Document #14482, effective February 13, 2026 and expiring February 13, 2036.

One more structural point. New Hampshire has no separate plumbers' board, gas board or mechanical contractors' board. It has one board covering plumbing, fuel gas fitting, domestic appliances, hearth systems and the voluntary oil heat certification. Since July 1, 2024 the state has enforced the 2021 editions of its adopted codes, which the board lists on its home page.

What New Hampshire Actually Licenses

Here is every credential on the board's published fee schedule:

• Apprentice Plumber
• Journeyman Plumber
• Master Plumber
• Fuel Gas Fitting Trainee
• Fuel Gas Fitter (Piping Installer, Installation Technician and Service Technician)
• Hearth Installer
• Domestic Appliance Technician
• Plumber Water Treatment Business
• Mechanical Business Entity
• Oil Heating Technician Certification

There is no air conditioning license, no refrigeration license, no sheet metal or duct license and no "HVAC technician" license. If a job involves no fuel gas connection and no plumbing, the mechanical licensing chapter does not license it. The state building and fire codes, local permits and the federal refrigerant rules still apply.

That federal piece matters for every cooling tech. Under the Clean Air Act, the EPA's Section 608 program requires technicians who maintain, service, repair or dispose of equipment that could release ozone depleting refrigerants to be certified. The test covers a core section plus Type I (small appliances), Type II (high pressure) and Type III (low pressure).

So for state licensing purposes, an HVAC company in New Hampshire is really a gas company. The license follows the fuel, not the equipment. The moment a furnace, boiler, water heater, rooftop unit or generator runs on propane or natural gas, the person connecting, venting or servicing it needs the right gas endorsement.

The Four Fuel Gas Fitter Endorsements

Mec 305.02 through 305.05 define four fuel gas fitter endorsements, and Mec 305.06 adds the domestic appliance technician. They are not tiers of one license with a bigger number on top. Each has its own scope, and RSA 153:29, III says no licensee may engage in any activity not covered by their specialty license.

The hour standards for three of these are written into the statute itself. RSA 153:28, I(a) requires 1,000 hours within a 60 month period for the installation technician and piping installer, with up to 500 oil hours allowed, and 2,000 hours for the service technician, with up to 750 oil hours allowed.

Fuel Gas Piping Installer

Scope (Mec 305.02(a)). Installation of liquefied propane and natural gas piping from the point of delivery, meaning the outlet of the first stage regulator for LP or the outlet of the natural gas meter, to any and all gas appliances or other gas utilization equipment, including future portions of the distribution system.

Requirements (Mec 305.02(b)). At least 60 hours of education covering basic gas theory and the properties of propane and natural gas, plan reading, sizing tables and charts, underground and above ground piping installation, purging, initial pressure testing and leak checking, documentation of pressure tests including customer notification on odor recognition, and the laws and codes that govern gas piping. Plus 1,000 working hours relevant to gas piping installation within 60 consecutive months, of which 500 hours may come from installing, servicing and repairing heating oil fired equipment.

The catch that is also the shortcut. Mec 305.02(a)(2) lists being licensed as a New Hampshire plumber among the conditions for this endorsement, while the statutory definition in RSA 153:27, VI covers a person who installs gas piping or who is a licensed plumber. Ask the board which reading it applies before a non plumber starts this track. What is clear is the shortcut: Mec 305.02(c) says that, notwithstanding any rule to the contrary, a New Hampshire licensed plumber in good standing qualifies once they complete the 60 hours of education. For a licensed plumber, this endorsement is 60 classroom hours away, with no separate 1,000 hours.

Fuel Gas Installation Technician

Scope (Mec 305.03(a)). Installation of inside and outside piping from the outlet of the gas meter or first stage regulator, and of residential and non residential heating and water heating systems using LP or natural gas. That includes piping from the point of delivery to the appliances, installing the appliances, installing the venting and vent systems including combustion and dilution air, and performing safety checks, fuel conversion and start up.

Requirements (Mec 305.03(b)). At least 100 hours of education: the six piping subjects above, plus appliance installation and clearance to combustibles, combustion and ventilation air sizing, venting categories, vent materials, sizing and clearances, placing appliances into service while controlling the fuel and air mixture, verifying safety controls, and using combustion analyzers. Plus 1,000 working hours within 60 consecutive months, 500 of which may come from oil fired appliance work.

Ascending from Piping Installer (Mec 305.03(c)). A piping installer moving up needs a 40 hour approved program on the appliance and venting subjects, plus the 1,000 hours.

Fuel Gas Service Technician

Scope (Mec 305.04(a)). Servicing and repair of inside and outside piping from the outlet of the gas meter or first stage regulator, and of residential and non residential heating and water heating systems using LP or natural gas. This is the diagnostic and repair license.

Requirements (Mec 305.04(b)). At least 140 hours of education: everything above, plus troubleshooting electrical circuits and controls with a meter, testing safety and sensing devices, gas pressure measurement at the supply and burner, ignition safety systems including 100 percent pilot safety shut off and electronic shut off devices, flue gas analysis and carbon monoxide detection, reading wiring diagrams for sequence of operation, and heat exchanger inspection and routine service. Plus 2,000 working hours within 60 consecutive months, 750 of which may come from oil fired work.

Ascending from Installation Technician (Mec 305.04(c)). A 40 hour approved program on the diagnostic subjects, plus the 2,000 hours.

Hearth System Installation and Service Technician

Scope (Mec 305.05(a)). Installation, servicing and repair of LP or natural gas hearth appliances and venting systems.

Requirements (Mec 305.05(b)). At least 60 hours of education covering gas theory, piping, purging and leak checking, placing equipment into service, hearth installation and clearances, combustion and dilution air, venting, hearth diagnostics and troubleshooting, gas pressure measurement, flue gas analysis and leak detection, ignition controls and the adopted codes. Plus 2,000 hours of field experience on hearth appliances and hearth venting within 60 consecutive months.

Hearth carries the same 2,000 field hours as the service technician on less than half the classroom hours. It is a narrow scope, not an easy one.

The Domestic Appliance Technician License

This license sits outside the four fitter endorsements, and its scope is drawn tightly.

Scope (Mec 305.06(a)). Installation, servicing and repair of LP or natural gas domestic appliances designed specifically for residential use, limited to residential clothes dryers and their exhaust systems, domestic cooktops and ranges and their venting systems, outdoor cooking equipment, and pool heaters, including the venting for which the training and manufacturer certification applies.

Requirements (Mec 305.06(b)). At least 40 hours of education on gas theory, fixed piping, purging and leak checking of piping and residential cooking and drying appliances, generators, outdoor pool heaters and outdoor fireplaces, placing equipment into service, clearances, combustion and ventilation air, venting, and residential dryer exhaust. Plus a minimum of 30 hours of factory authorized certification training on the specific appliances, and 1,000 hours of relevant field experience within 60 consecutive months.

The 30 hours of manufacturer authorized training is written into the licensing rule itself rather than left to the employer. Plan for it before a new hire starts, because the training is specific to the appliances the tech will actually install.

The Scope Pyramid: Hold One, Get Four

For a company planning its staffing, this pair of rules deserves a close read, and both were readopted in February 2026.

Mec 302.07. An individual who meets the qualifications for fuel gas service technician is deemed qualified as a domestic appliance technician, a fuel gas installation technician, a hearth system installation and service technician, and a fuel gas piping installer.

Mec 302.08. An individual who meets the qualifications for fuel gas installation technician is deemed qualified as a domestic appliance technician, a hearth system installer and service technician, and a fuel gas piping installer.

So the service technician sits at the top and carries all four other scopes with it. For a company deciding where to put its people, 140 classroom hours and 2,000 field hours produce a technician who covers piping, installation, hearth and domestic appliances. Running four separate tracks would cost far more of both.

It changes the trainee math too. Under Mec 605.03, gas fitting licensees may employ at any one time no more than two fuel gas fitting trainees for every one licensed fuel gas fitting technician, provided the licensee's endorsement meets or exceeds the level of the work the trainees perform. A service technician can supervise trainees on any of the gas scopes; a piping installer can supervise trainees on piping.

One administrative change sits on top of this. In a December 2024 notice, the OPLC said the old single "Gas Fitter" license is being converted to the specific license types, starting with licenses expiring in 2026, and that the "upgrade" system has been discontinued. License types are now defined at issuance, additional qualifications require applying for a separate license or specialty, and the license number does not change.

The Trainee Registration

New Hampshire licenses the trainee. Under Mec 302.01 no one may work as a fuel gas trainee without a registration license, and under Mec 302.02 the minimum age is 16 for a trainee and 18 for an individual gas fitting license.

The trainee application (now Mec 304.04(d)) requires a signed letter from the licensed fuel gas fitter who will supervise. The letter must state that the sponsor or a licensed fitter in the same firm will provide direct supervision; that the sponsor will register the applicant in an approved fuel gas training program for the discipline; that the applicant will join an employee development program in which the firm records hours of actual service, competency levels and completion of the required education; and that the sponsor believes the applicant is competent to be trained.

There is a field experience route with conditions (Mec 302.11). An applicant submitting relevant field experience obtained within 60 months before submission under RSA 153:28, I(a)(1) to (4) and (6) is not eligible for any licensing exam without first completing the minimum formal education for each endorsement, must submit the hours on a sworn affidavit approved by the board, and must have them verified by the employer or responsible managing employee.

How to Get a New Hampshire Gas Fitter License, Step by Step

1. Pick the endorsement that matches the work. Use the table above, and remember Mec 302.07 and 302.08: the service technician and installation technician scopes include the narrower ones.
2. Register as a Fuel Gas Fitting Trainee. Get a sponsor letter from a licensed fitter, file the registration ($88 for 2 years), and work only under direct supervision within the 2 to 1 ratio.
3. Enroll in a board approved program. The OPLC lists nine approved fuel gas education programs, including Advanced Trade School, Granite State Trade School, Manchester Community College, the NH School of Mechanical Trades and UA Local Union 131.
4. Log field hours inside a 60 month window. Your sponsor or employer signs the hours; oil heat hours count up to the limits in the table.
5. Pass the licensing exam at the end of the course. Gas exams are offered through Advanced Trade School, Granite State Trade School and NH Gasfitters Continuing Education Online.
6. Apply to the OPLC. Under Mec 304.04(e) the packet includes your trainee or existing license, proof of education, proof of the exam, signed service hours, any affidavit of field experience, and a competency letter from your supervising fitter, plus the $198 fee.
7. Keep it current. Complete 6 hours of board approved continuing education per endorsement every 2 year cycle and renew before the license expires.

The Gas Fitter Exams

Exams run through board approved training programs and testing organizations under Mec 308. Mec 308.02 requires an approved testing program to use exams of no fewer than 100 questions with a passing score of not less than 70 percent, unless a rule sets another mark. Proctors may not have been the candidate's instructor, candidates must show government photo ID, and only a non programmable calculator is allowed.

The OPLC tells candidates to take the exam first and apply afterward, and warns that a passing grade does not by itself guarantee a license. Since May 12, 2025 the vendor ProV proctors New Hampshire's plumbing and electricians exams for the OPLC. Gas fitter exams are not on that list, so a guide telling you to book a single statewide gas exam with one national vendor is describing another state.

The Electrician Exception, and How Narrow It Is

Mec 303.10(a) says the gas fitting license requirements do not apply to a person licensed under RSA 319-C, a New Hampshire electrician, when performing work governed by their license on gas appliances.

Then subsection (b) closes it almost entirely: "This exemption is specifically limited to the operation of the appliance service gas shut off valve." A licensed electrician may turn the gas off at the appliance valve to do electrical work, and that is the whole exemption. It is not authority to disconnect, reconnect, pipe, vent or service a gas appliance. The full electrical picture is in our New Hampshire electrician licensing guide.

Oil Heat and Water Treatment Are Voluntary

Chapter Mec 700 is titled "Voluntary Certification of Heating Installers and Heating Equipment Service Personnel." Chapter Mec 800 is titled "Voluntary Water Treatment Certification." Both mean what they say.

Oil fired heating work is not a licensed trade in New Hampshire. The Oil Heating Technician Certification costs $50 for 2 years, whether initial, renewal or reinstatement, and is optional. The Plumber Water Treatment Business license, at $275, is a separate business credential on the fee schedule.

Plan around the oil certification anyway, because those oil hours are creditable against the mandatory gas endorsements: 500 hours toward the piping installer and installation technician requirements, and 750 toward the service technician. That covers half the field hours for the first two endorsements and 37.5 percent of the service technician's 2,000 hours.

New Hampshire Gas Fitter and Mechanical License Fees

Every fee below comes from the OPLC's published schedule and Plc 1002.25 (effective July 1, 2025). One fee covers the initial license, the renewal, or reinstatement after expiration, and each license runs 2 years.

Licenses are issued electronically. A printed wall certificate is $20 by mail, and a letter of good standing or other license verification is $10 (Plc 1001.15). Gas exams are scheduled and paid through the approved providers, and the education is priced by the training programs. Fees change, so confirm with the OPLC before you apply.

Renewal, Expiration and Continuing Education

Terms. An initial individual license runs 2 years (Mec 302.03) and an initial business entity license runs 2 years (Mec 302.04). RSA 310:8, II makes OPLC licenses valid 2 years from the date of issuance.

Expiration. Mec 402.01(a) says individual fuel gas fitting, domestic appliance technician, hearth and plumbing licenses expire every 2 years on the last day of the month the license was issued. The old birth month rule sat in former Saf-Mec 402.01(a), which rested on RSA 153:30; the rule was replaced in December 2023 and RSA 153:30 was repealed the same year. For business entities, RSA 153:29-a, II points renewal to RSA 310:8; read the expiration date printed on the business license and renew ahead of it.

Lapse. Under RSA 310:8, III an expired license may not be used to practice, and an expired license lapses one year after expiration. Within that year, Mec 405.01 lets you reinstate by completing the renewal process with your continuing education and the fee. After a year you apply as a new applicant. For anyone 365 days or more past expiration, the OPLC says an exam is offered through the education providers in place of the 140 hour course, for fuel gas only.

Continuing education (Mec 404.01). No fewer than 6 hours per endorsement per 2 year cycle, from a board approved seminar provider; the OPLC frames it as 3 hours of code update each year. A tech holding a fuel gas service technician endorsement and a master plumber license needs six hours for each. Seminars are at least 3 contact hours in a classroom, and under Mec 404.03(f) no credit is given for a repeated seminar, so you need separate board approved sessions inside each cycle.

Moving to New Hampshire From Another State

Mec 302.12 lets an out of state licensee sit for the New Hampshire plumbing or fuel gas exam with proof of licensure from the state where they worked. They still must meet the on the job experience for the level sought, or its equivalent in an approved educational setting.

Two faster paths exist, and one of them is narrower than people expect.

Notes: the Connecticut standing order covers S-1 and S-2 licensees whose Connecticut license carries an unlimited heating, piping and cooling scope, and who apply as a New Hampshire Fuel Gas Service Technician; they still sit the NH exam.

The same HB 594 table does list qualifying states for journeyman and master plumbers. For gas work, plan on the exam.

Exemptions Worth Knowing

RSA 153:36 and Mec 303 carve out a few groups. A homeowner may do fuel gas fitting in an existing single family, stand alone home they own, occupy and use as their primary residence, but must still meet the technical codes and any permit and inspection requirements. Utility work covered by 49 C.F.R. part 192 and the public utilities commission's gas rules is exempt, and so are supervised students in approved vocational programs.

An ASME certified welder may join gas pipe only under the direct supervision of a licensed fuel gas fitter or master plumber (Mec 303.05). None of these exemptions reaches a contractor doing gas work for customers.

Where Other Guides Go Wrong on New Hampshire

Four errors recur, and they are worth naming so you can spot them.

Calling it an HVAC license. Several roundups say New Hampshire has no HVAC licensing and stop there. That is half true: there is no HVAC license, but any heating job that runs on propane or natural gas, or connects to a gas line, is licensed gas work.

Inventing a single testing vendor. Gas fitter exams run through board approved providers under Mec 308. ProV proctors the plumbing and electrical exams, not the gas exams.

Inventing a home improvement registration. At least one page ranking for New Hampshire contractor licensing says residential contractors "must register as a Home Improvement Contractor under RSA 332-A." RSA 332-A is titled "Licensing Standards Established" and has two sections: 332-A:1, Licensing Questions Restricted, and 332-A:2, Licensing and Employment of Aliens. It has nothing to do with home improvement contractors.

Flattening the endorsements. A single "New Hampshire gas fitter license" with one set of hours misses the four endorsement structure, and with it the scope rule in Mec 302.07 and 302.08 that decides what your technicians can do and supervise.

Does Your Company Need Its Own License?

Yes. Mec 302.05 requires every business entity, corporation, partnership, LLC, LLP and sole proprietor performing fuel gas fitting or plumbing in New Hampshire to be licensed, and Mec 307.05 bars any business from gas, plumbing, hearth or domestic appliance work without a business entity license. RSA 153:29-a, V adds proof of good standing with the Secretary of State and proof of liability insurance before the license issues or renews. A sole proprietor with no employees pays no business license fee under Mec 307.04(a)(4).

The gas endorsements are individual credentials; the authority to sell the work belongs to the Mechanical Business Entity license. Under Mec 307.04(a)(3) and RSA 153:29-a, I, that license exists only while the company employs a corporate officer or responsible managing employee holding the New Hampshire gas fitting, master plumber, domestic appliance or hearth license for the discipline. If that person dies or leaves, Mec 307.04(b) requires notice to the board within 30 days, and the business may not act as a fuel gas fitter or plumber until a replacement licensed fitter or master plumber is in place. No grace period is written into the rule.

The lawful way to fill that seat when you do not have the license in house is to hire a properly endorsed licensee as a genuine full time W-2 employee, not a 1099 contractor, who actually supervises the gas work. Mec 607.01(b) bars a licensee from letting their credential serve another person's permits "or for any other purpose," so a name on paper is not an option. The founders of The Licensing Company, Marshall Schofield and Jeremiah Jaskulski, built the firm around that full time employment model, and it is how we place a qualifying agent. If your company needs a New Hampshire responsible managing employee, see hiring a qualifying agent, browse our contractor qualifier services, and read our New Hampshire responsible managing employee guide.

Frequently Asked Questions

How much does an HVAC license cost in New Hampshire? There is no HVAC license to buy. The board fees that matter are $198 for a fuel gas fitter license, $176 for a domestic appliance technician license, $88 for a trainee registration and $275 for the Mechanical Business Entity license, each for 2 years. The larger cost is the education, 40 to 140 hours depending on the endorsement, which the approved training programs price, plus the exam fee each provider sets.

How long does it take to get a gas fitter license in New Hampshire? The field hours set the pace: 1,000 hours for the piping installer, installation technician and domestic appliance technician, and 2,000 for the service technician and hearth. All of it must fall within 60 consecutive months, so old hours age out. A New Hampshire licensed plumber is the fastest case, needing only the 60 hour course for the piping installer endorsement.

Do I need a license to install air conditioning in New Hampshire? Not from the Mechanical Licensing Board, because air conditioning and refrigeration are not among its license categories. You still need EPA Section 608 certification to handle regulated refrigerants, and local permits and the state codes apply. The moment the job touches gas piping or a gas appliance, you are back inside the licensed endorsements.

Does my company need its own license? Yes. Mec 302.05 requires every business entity, including a sole proprietor, doing gas fitting or plumbing to hold a Mechanical Business Entity license. Mec 307.04(a)(3) makes that license depend on an officer or responsible managing employee who holds the New Hampshire license for the discipline. Our New Hampshire plumbing licensing guide covers the plumbing side of the same business license.

Can I use my Massachusetts or Connecticut license in New Hampshire? Not directly for gas work. The HB 594 reciprocity list shows "None" for the fuel gas service technician and "TBD" for the other gas licenses. Connecticut S-1 and S-2 holders have a standing board order approving them to sit the New Hampshire exam for fuel gas service technician; other out of state licensees can sit the exam under Mec 302.12 if they meet the experience requirement.

What happens if my license expires? Under RSA 310:8 you may not practice on an expired license. Within one year you can reinstate by completing the renewal process with your continuing education and the fee; after one year you apply as a new applicant. The OPLC offers fuel gas licensees 365 days or more past expiration an exam through the education providers in place of the 140 hour course.

How do I look up or verify a New Hampshire gas fitter license? The OPLC runs a License Lookup tool on its website that lets anyone search a license by name or number to confirm it is current. If you need a formal written verification letter instead, mailed or emailed directly by the office, that costs $10 under Plc 1001.15.

Talk to Us About Qualifying a New Hampshire Mechanical Company

If you are opening a New Hampshire gas or mechanical business, or you just lost the licensee who held your responsible managing employee seat, we can walk you through the board's requirements and what a qualifying agent would do inside your company. Call 615-219-2110 or start at hiring a qualifying agent. You can also browse other states.

Last reviewed October 18, 2026. Endorsement hours, fees, expiration rules and rule numbers are set by the New Hampshire Mechanical Licensing Board and the OPLC and change from time to time. Verify current requirements with the OPLC before applying.

Sources

Statute and rule citations re-verified directly against gc.nh.gov on 2026-10-18. OPLC-hosted notices and the fee schedule were last directly opened 2026-09-27; oplc.nh.gov blocked direct access again today, so those were corroborated this pass through search rather than re-opened (see spec for detail).

• OPLC Mechanical Licensing Board
• OPLC Mechanical Licensing License Fees
• OPLC Mechanical Licensing Education Requirements
• OPLC Mechanical Licensing Laws and Rules
• OPLC notice, Important Changes to Gas Fitter Licenses (December 2024)
• OPLC notice, Examination Information effective May 12, 2025
• Mec 300 adopted rule text, effective February 13, 2026
• Mec 500 adopted rule text, effective October 15, 2025
• Mechanical Licensing Board standing order for Connecticut S-1 and S-2 licensees
• OPLC Request a Wall Certificate
• OPLC New Changes for Reciprocity in New Hampshire (HB 594)
• OPLC License Lookup
• N.H. Admin. Rules, Chapter Mec 300
• N.H. Admin. Rules, Chapter Mec 400
• N.H. Admin. Rules, Chapter Mec 500
• N.H. Admin. Rules, Chapter Mec 600
• N.H. Admin. Rules, Chapter Mec 700
• N.H. Admin. Rules, Chapter Mec 800
• N.H. Admin. Rules, Chapter Plc 1000 (fees)
• RSA 153:27, Definitions
• RSA 153:28, Rulemaking
• RSA 153:29, Examinations and Licenses
• RSA 153:29-a, Mechanical License, Business Entities
• RSA 153:30 (repealed 2023)
• RSA 153:36, Exceptions
• RSA 310:8, License Renewals and Reinstatements
• RSA Chapter 332-A table of contents
• EPA Section 608 Technician Certification