HVAC Replacement — Maine license requirements
01 The project
The starting point is the work itself — HVAC Replacement in Maine. The job determines which trades are involved, and the trades determine which license classifications may be required.
| Component | Trade |
|---|---|
| Existing heating or cooling system | HVAC |
02 Jurisdiction
This project is evaluated for Maine — the no-statewide-GC state. Maine issues no general or residential contractor license; the work is regulated by the individual trade credentials (electrician ch. 17, plumber ch. 49, fuel technician ch. 139), the ch. 128 door-to-door home-repair registration, and municipal building/plumbing permits (MUBEC; 30-A §4215). Maine jurisdiction page.
Building-permit and plumbing-permit fees are municipality-set and were not read — LOCAL_AUTHORITY_REQUIRED. Maine imposes no statewide surety bond and no statewide general-liability minimum on any board credential, so no amount appears here to verify against. State requirements are not the complete story for any locality.
03 Trade → license
Relations below are recorded per state — only this jurisdiction's classifications are shown.
Trades involved: HVAC.
- May require MASTER-FUEL-TECHNICIAN — Master Oil Burner and/or Solid Fuel Technician confirmed S-ME-32-18132 rule ME-FUEL-LICENSETHE combustion/fuel credential: a Maine Fuel Board license (master/journeyman/apprentice, with endorsement authorities) is required to install, clean, service, alter or repair oil, solid fuel, propane or natural gas equipment (ch. 139). There is NO statewide HVAC contractor license (verified absence, REQ-ME-NO-HVAC-LICENSE-001) — the board MOUs draw the boundary between fuel, electrical and plumbing work.
- May require PROPANE-NATURAL-GAS-TECHNICIAN — Propane and Natural Gas Technician confirmed S-ME-FUEL-BOARD rule ME-FUEL-LICENSEPropane/natural-gas limb: a Propane and Natural Gas Technician license requires a Maine Fuel Board examination (32 §18135(2)) plus CETP certificates and an onboard transcript. A helper works under direct and continuous supervision.
- May require MASTER-ELECTRICIAN — Master Electrician confirmed S-ME-32-1201 rule ME-ELECTRICAL-LICENSELine-voltage limb: electrical work outside the fuel license restrictions (line voltage, disconnects, circuits) requires a licensed electrician + an electrical permit (§1201 / §1102-C). §1201-A(7)-(8) exempt a ch. 139 technician from electrician licensing only 'subject to the restrictions of the license as issued'.
- Component basis JOURNEYMAN-ELECTRICIAN — Journeyman Electrician confirmed S-ME-32-1202-B rule ME-ELECTRICAL-LICENSEWorker limb for the electrical portion: a journeyman electrician employed by a supervising master/limited electrician or an electrical company (§1202-B(4)).
- Alternative path MASTER-PLUMBER — Master Plumber confirmed S-ME-32-3302 rule ME-PLUMBING-EXCEPTIONSCONDITIONAL water/steam limb: the Fuel Board/PEB MOU for hot water, steam and warm-air systems and radiation connections means part of the work can be plumbing — a licensed plumber performs water/steam distribution, while the fuel technician covers combustion and the electrician covers line voltage.
04 Scope
What the official sources say about the work involved — typed assertions, never a boolean "covers". Interpretations are marked as such.
- Officially included MASTER-ELECTRICIAN Engaging In The Business Of Installing Electrical Wires Conduits Apparatus Fixtures And Equipment (may_perform) 32 MRSA ch. 17 (§1202-B; board class page) S-ME-EEB-MASTER Maine has no separate 'electrical contractor' license: the business-holding credential IS the master electrician license. A limited electrician shares the permit authority.
- Officially included JOURNEYMAN-ELECTRICIAN Electrical Installations While Employed By A Master Limited Or Electrical Company And Supervising A Capped Crew (may_perform) 32 MRSA §1202-B(4) S-ME-32-1202-B A journeyman may supervise a small crew but not hold the business or pull the permit — that is the master/limited class.
- Officially included MASTER-PLUMBER Engaging In The Business Of Installing Plumbing Or Plumbing Systems (may_perform) 32 MRSA ch. 49 (board definition; §3302(2)-(3)) S-ME-PEB-LICENSING As with electrical, there is no separate 'plumbing contractor' license — the master plumber license IS the business-holding credential.
- Officially included MASTER-FUEL-TECHNICIAN Installing Cleaning Servicing Altering Or Repairing Oil Burning And Or Solid Fuel Equipment (may_perform) 32 MRSA §18132(1) S-ME-32-18132 The credential is endorsement-scoped: an oil burner authority does not authorise propane/natural-gas work and vice versa.
- Officially excluded MASTER-FUEL-TECHNICIAN Line Voltage Electrical Work Outside The Fuel License Restrictions (may_not_perform) 32 MRSA §1201-A(7)-(8) + Fuel Board MOU list S-ME-FUEL-BOARD The HVAC replacement page's decisive boundary: combustion work = fuel license; line voltage = electrician; water/steam connections = the MOU crossovers.
- Requires another classification MASTER-ELECTRICIAN A Maine Licensed Electrician For Plug In Photovoltaic Or Battery Systems Over 420 Watts Up To 1200 Watts (requires) 35-A MRSA §3475 (LD 1730 / P.L. 2025 c. 644) S-ME-EEB The only solar-specific Maine provision found; ordinary rooftop PV has no separate license and is ch. 17 electrical work.
05 Requirements
| Requirement | Kind | Statement | Source |
|---|---|---|---|
| No statewide HVAC contractor license exists — fuel, electrical and plumbing credentials cover the work Maine Fuel Board page (license categories + MOUs) read 2026-10-05 | exemption | Maine issues no statewide HVAC or mechanical contractor license. HVAC-shaped work is covered by the credential that legally performs it: combustion equipment and fuel piping by a Maine Fuel Board license (ch. 139), line-voltage electrical work by a licensed electrician (ch. 17), and water/steam distribution connections by the ch. 49 / ch. 139 crossovers defined by the boards' MOUs. The board page for the Maine Fuel Board lists the fuel licenses and the MOUs but no separate HVAC contractor credential. | S-ME-FUEL-BOARDSource S-ME-FUEL-BOARD — Maine Fuel BoardMaine Fuel Board — official page — Maine Fuel Board page (license categories + MOUs) read 2026-10-05 https://www.maine.gov/pfr/professionallicensing/professions/maine-fuel-board Retrieved 2026-10-05 · last verified 2026-10-05 Read in full 2026-10-05: board purpose and the eight license categories; propane/natural-gas licensing requires a Maine Fuel Board exam (32 §18135(2)) plus CETP certificates and an onboard transcript; MOUs with the Electricians' and Plumbers' Boards for mini-split heat pumps and hot-water/steam/warm-air systems; apprentice renewals require a supervising master on file; State Fire Marshal handles the fuel-gas detection law (not the Board); fuel inspector county assignments published. |
| Oil, solid fuel, propane and natural gas work requires a Maine Fuel Board license 32 MRSA §18132 + ch. 139 section list + Fuel Board pages (read 2026-10-05) | license | 32 MRSA ch. 139 requires a Maine Fuel Board license to install, clean, service, alter or repair oil burning, solid fuel, propane or natural gas equipment (§18102), with the license categories defined in §§18132-18141: Master and Journeyman and Apprentice Oil Burner and/or Solid Fuel Technician, Propane and Natural Gas Technician and Helper, and the limited tank-installer, wood-pellet and energy-auditor licenses. A master oil burner technician 'may install, clean, service, alter or repair oil burning equipment' and must hold one or more authorities; propane and natural gas applicants must first pass a Maine Fuel Board propane and gas examination (§18135(2)). | S-ME-32-18132Source S-ME-32-18132 — Maine Legislature — Maine Revised Statutes (legislature.maine.gov)32 MRSA §18132 — Master oil burner technician or solid fuel technician — 32 MRSA §18132 + ch. 139 section list + Fuel Board pages (read 2026-10-05) https://legislature.maine.gov/statutes/32/title32sec18132.html Retrieved 2026-10-05 · last verified 2026-10-05 Read 2026-10-05: scope + qualifications verbatim — a master oil burner technician may install/clean/service/alter/repair oil burning equipment and hold one or more authorities (#1/#2 oils up to 15 gal/h; #1/#2 over 15 gal/h; #4/#5/#6; #1-6; pellet-fired central heating appliances); a master solid fuel technician may install/clean/service/alter/repair solid fuel burning equipment. Qualification = board exam + 4 years of licensed practical experience, of which at least 2 years as a licensed journeyman. |
| Fuel technicians and electricians have narrow reciprocal crossovers, bounded by board MOUs Fuel Board page MOU list + 32 MRSA §1201-A(7)-(9) / §3302(1)(B) (read 2026-10-05) | exemption | 32 MRSA §1201-A exempts ch. 139 fuel licensees from electrical licensing 'subject to the restrictions of the license as issued', and §3302(1)(B) exempts ch. 139 technicians from plumbing licensing only for same-room hot/cold connections to existing piping not beyond an existing branch. The Maine Fuel Board publishes MOUs with the Electricians' Examining Board for the installation of mini-split heat pumps in one- and two-family dwellings and for the installation, service and repair of hot water, steam and warm air heating systems and water heaters, and an MOU with the Plumbers' Examining Board for hot water or steam heating systems and radiation connections — the boundary that decides whether a replacement is fuel work, plumbing work or line-voltage electrical work. | S-ME-FUEL-BOARDSource S-ME-FUEL-BOARD — Maine Fuel BoardMaine Fuel Board — official page — Fuel Board page MOU list + 32 MRSA §1201-A(7)-(9) / §3302(1)(B) (read 2026-10-05) https://www.maine.gov/pfr/professionallicensing/professions/maine-fuel-board Retrieved 2026-10-05 · last verified 2026-10-05 Read in full 2026-10-05: board purpose and the eight license categories; propane/natural-gas licensing requires a Maine Fuel Board exam (32 §18135(2)) plus CETP certificates and an onboard transcript; MOUs with the Electricians' and Plumbers' Boards for mini-split heat pumps and hot-water/steam/warm-air systems; apprentice renewals require a supervising master on file; State Fire Marshal handles the fuel-gas detection law (not the Board); fuel inspector county assignments published. |
| An electrical installation may not be made unless by an electrician licensed by the board 32 MRSA §1201 verbatim + §1202-B (read 2026-10-05) | license | 32 MRSA §1201 verbatim: 'An electrical installation may not be made unless by an electrician licensed by the board except as provided in this chapter.' The licensed classes under §1202-B are master, journeyman, limited, journeyman-in-training, apprentice and helper electrician; a master or limited electrician is the class authorised to apply for an electrical permit under §1102-C(2). | S-ME-32-1201Source S-ME-32-1201 — Maine Legislature — Maine Revised Statutes (legislature.maine.gov)32 MRSA §1201 — License required — 32 MRSA §1201 verbatim + §1202-B (read 2026-10-05) https://legislature.maine.gov/statutes/32/title32sec1201.html Retrieved 2026-10-05 · last verified 2026-10-05 Read 2026-10-05: 'An electrical installation may not be made unless by an electrician licensed by the board except as provided in this chapter.' Backs REQ-ME-ELECTRICAL-LICENSE-001 and rule ME-ELECTRICAL-LICENSE. |
| An electrical permit must be obtained from the board before the installation, with statutory exceptions 32 MRSA §1102-C(1)-(5) verbatim (read in full 2026-10-05) | permit | 32 MRSA §1102-C: 'a permit must be obtained from the board before an electrical installation may be performed.' The application must be submitted by a licensed master electrician or limited electrician; an inspection is required before wiring is enclosed; a utility must require proof of permit before connecting power. §1102-C(5) exempts a single-family dwelling installation performed by a licensed electrician, an owner in an existing single-family dwelling they occupy, minor repair work (lamps, fuses, lighting fixtures, switches, sockets, outlets, low-voltage equipment, service-entrance repair), work by ch. 139 fuel licensees, the ch. 49 plumber and ch. 69-C pump-installer like-in-kind exceptions, and work permitted by a municipality under 30-A §4173. | S-ME-32-1102-CSource S-ME-32-1102-C — Maine Legislature — Maine Revised Statutes (legislature.maine.gov)32 MRSA §1102-C — Permit; inspection of electrical installations — 32 MRSA §1102-C(1)-(5) verbatim (read in full 2026-10-05) https://legislature.maine.gov/statutes/32/title32sec1102-C.html Retrieved 2026-10-05 · last verified 2026-10-05 Read in full 2026-10-05 (PL 2017 c. 198 §6; PL 2025 c. 88 §1). Permit required before an electrical installation; application by a licensed master or limited electrician; inspection before wiring is enclosed; utility requires proof of permit. Exceptions (§5) include single-family installation by a licensed electrician (A), an owner in an existing single-family dwelling they occupy (A-1, 2025), utility/transmission work, minor repair work incl. lamps/fuses/fixtures/switches/outlets/low-voltage/service-entrance repair (D), municipal-permit work under 30-A §4173 (E), industrial/manufacturing (F-G), ch. 139 fuel licensees (H-I), ch. 49 plumbers' like-in-kind water pump/heater conductor work in residential properties (J), ch. 69-C pump installers ≤3 hp (K). Combined permit+inspection service fee set by rule, ≤$100. Backs REQ-ME-ELECTRICAL-PERMIT-001 and rule ME-PERMIT. |
| Plumbing license exceptions — owner's single-family residence, fuel technicians' same-room connections, pump installers, utility employees 32 MRSA §3302(1)(A)-(D) verbatim (read 2026-10-05) | exemption | 32 MRSA §3302(1) also states that 'a license is not required for any activity for which a permit is not required under Title 30-A, section 4215', and exempts: plumbing by regular employees of public utilities when working as such; plumbing by ch. 139 oil burner technicians and propane/natural gas installers, but only for hot and cold water connections to existing piping in the same room and not beyond any existing branch connection supplying water; plumbing by a person in a single-family residence they occupy or will occupy as their bona fide personal abode; and plumbing by a ch. 69-C pump installer limited to piping from the pressure-tank main shut-off to existing supply piping, same room, no longer than 15 feet and not beyond existing branches. | S-ME-32-3302Source S-ME-32-3302 — Maine Legislature — Maine Revised Statutes (legislature.maine.gov)32 MRSA §3302 — Applicability — 32 MRSA §3302(1)(A)-(D) verbatim (read 2026-10-05) https://legislature.maine.gov/statutes/32/title32sec3302.html Retrieved 2026-10-05 · last verified 2026-10-05 Read in full 2026-10-05. 'A license is required for any individual who is engaged in plumbing or performing plumbing installations. A license is not required for any activity for which a permit is not required under Title 30-A, section 4215.' Exceptions: public-utility employees (A), ch. 139 oil/propane licensees limited to hot/cold connections to existing piping in the same room and not beyond an existing branch (B), a person in a single-family residence they occupy/will occupy as bona fide personal abode (C), ch. 69-C pump installers within the ≤15 ft same-room limits (D). (2) Municipal licenses not required and municipalities may not issue a plumbing permit unless satisfied the applicant complies with ch. 49. (3) A master/journeyman may not supervise more than 3 trainee plumbers. Backs REQ-ME-PLUMBING-LICENSE-001, REQ-ME-PLUMBING-EXCEPTIONS-001, REQ-ME-PLUMBING-PERMIT-001, REQ-ME-TRAINEE-LIMIT-001 and rules ME-PLUMBING-LICENSE / ME-PLUMBING-EXCEPTIONS / ME-PLUMBING-PERMIT / ME-TRAINEE-SUPERVISION. |
| No statewide surety-bond condition attaches to any Maine board credential — verified absence OPOR board list + ch. 17/49/139 sections read (no bond provision) 2026-10-05 | bond | Maine's construction credentials are individual trade LICENSES issued by the Electricians', Plumbers' and Maine Fuel Boards, and none of the board pages or licensing statutes read here imposes a surety-bond condition on licensure: the plumber and electrician pages list license, renewal, background-check, late and penalty fees but no bond, and ch. 49, ch. 17 and ch. 139 each contain no bond requirement. There is therefore no statewide contractor bond to post, verify or renew. | S-ME-OPOR-PROFESSIONSSource S-ME-OPOR-PROFESSIONS — Maine Office of Professional and Occupational Regulation (OPOR), Department of Professional and Financial RegulationOPOR — Professions and Occupations (complete credential list) — OPOR board list + ch. 17/49/139 sections read (no bond provision) 2026-10-05 https://www.maine.gov/pfr/professionallicensing/professions Retrieved 2026-10-05 · last verified 2026-10-05 Read in full 2026-10-05. Enumerates every credential OPOR administers — Accountants … Electricians … Oil and Solid Fuel Technicians … Plumbers … Propane & Natural Gas Technicians … Door-to-Door Home Repair Sellers … There is NO 'contractor' or 'general contractor' entry. This is the official basis for the verified absence of any statewide Maine contractor license (REQ-ME-NO-GC-LICENSE-001) and for CONFLICT-ME-001's resolving side. |
06 Rule: ME-FUEL-LICENSE
32 MRSA ch. 139 (Maine Fuel Board) licenses oil, solid fuel, propane and natural gas technicians: Master/Journeyman/Apprentice Oil Burner and/or Solid Fuel Technician, Propane and Natural Gas Technician/Helper, and limited categories. §18102 requires the license; §18132 defines the master scope (install, clean, service, alter or repair oil/solid fuel equipment) and the endorsement authorities. Propane/natural-gas applicants must pass a Maine Fuel Board exam (§18135(2)) with CETP certificates. Missing facts yield NOT_DETERMINED.
| Outcome | Conclusion | Caveats |
|---|---|---|
| fuel-license-required | fuel_license_required |
|
| no-fuel-license | fuel_license_not_required | — |
Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-ME-32-18131S-ME-32-18132S-ME-FUEL-BOARD
07 Rule: ME-ELECTRICAL-LICENSE
32 MRSA §1201: 'An electrical installation may not be made unless by an electrician licensed by the board except as provided in this chapter.' The licensed classes are master, journeyman, limited, journeyman-in-training, apprentice and helper electrician (§1202-B). Test ME-ELECTRICAL-EXCEPTIONS first. Missing facts yield NOT_DETERMINED.
| Outcome | Conclusion | Caveats |
|---|---|---|
| license-required | electrical_license_required |
|
| exception | electrical_license_exception |
|
Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-ME-32-1201S-ME-32-1202-BS-ME-32-1201-A
08 Rule: ME-PLUMBING-EXCEPTIONS
32 MRSA §3302(1) exceptions: no license is required for any activity for which a permit is not required under 30-A §4215, and the section exempts public-utility employees, ch. 139 oil/propane technicians (same-room hot/cold connections to existing piping, not beyond an existing branch), a person in a single-family residence they occupy or will occupy as their bona fide personal abode, and ch. 69-C pump installers (same room, ≤15 ft, not beyond existing branches). Missing facts yield NOT_DETERMINED.
| Outcome | Conclusion | Caveats |
|---|---|---|
| fuel-crossover | plumbing_exception_fuel_crossover |
|
| owner-abode | plumbing_exception_owner_abode | — |
| pump-installer | plumbing_exception_pump_installer | — |
| no-permit-no-license | plumbing_exception_no_permit |
|
Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-ME-32-3302
09 Rule: ME-NO-HVAC-LICENSE
Verified absence: Maine issues no statewide HVAC or mechanical contractor license. HVAC-shaped work is covered by the credential that legally performs it — combustion equipment and fuel piping by a Maine Fuel Board license (ch. 139), line-voltage electrical work by a licensed electrician (ch. 17), and water/steam connections by the ch. 49 / ch. 139 crossovers defined by the boards' MOUs. Missing facts yield NOT_DETERMINED.
| Outcome | Conclusion | Caveats |
|---|---|---|
| no-hvac-license | no_statewide_hvac_license |
|
Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-ME-FUEL-BOARDS-ME-32-18132
10 No HVAC license — the fuel, electrical and plumbing split
| Question | Maine answer | Source |
|---|---|---|
| Statewide HVAC contractor license | none exists — the work splits between the fuel, electrical and plumbing credentials (rule ME-NO-HVAC-LICENSE) | S-ME-FUEL-BOARD |
| Combustion / fuel work | a Maine Fuel Board license — master/journeyman/apprentice with endorsement authorities (rule ME-FUEL-LICENSE) | S-ME-32-18132 |
| Propane / natural gas | a Propane and Natural Gas Technician license requires a Maine Fuel Board exam (§18135(2)) plus CETP certificates and an onboard transcript; a helper works under direct and continuous supervision | S-ME-FUEL-BOARD |
| Line-voltage electrical work | a licensed electrician + electrical permit — §1201-A(7)-(8) exempt a ch. 139 technician only "subject to the restrictions of the license as issued" (rule ME-ELECTRICAL-LICENSE) | S-ME-32-1201 |
| The boundary | the Fuel Board publishes MOUs with the Electricians' and Plumbers' Boards (mini-split heat pumps; hot water/steam/warm air and water heaters) — the water/steam limb can be plumbing | S-ME-FUEL-BOARD |
| Bond | none statewide — verified absence (rule ME-NO-BOND) | S-ME-OPOR-PROFESSIONS |
11 Permit and verification layer
Maine separates the credential from the permit: the STATE boards decide who may work (the electrician / plumber / fuel licenses), while the municipality issues the building permit under the Maine Uniform Building and Energy Code (10 MRSA §9724) and the plumbing permit under 30-A §4215. Permit fees are municipality-set and were not read — LOCAL_AUTHORITY_REQUIRED. S-ME-10-9724
Verify the credential that actually applies on the official lookup before relying on any outcome here: OPOR licensee search (the Electricians', Plumbers' and Maine Fuel Boards publish their own surfaces through the ALMS portal). S-ME-OPOR-LOOKUP
Source S-ME-OPOR-PROFESSIONS — Maine Office of Professional and Occupational Regulation (OPOR), Department of Professional and Financial Regulation
OPOR — Professions and Occupations (complete credential list) — OPOR professions-and-occupations list (read in full 2026-10-05)
https://www.maine.gov/pfr/professionallicensing/professions
Retrieved 2026-10-05 · last verified 2026-10-05
Read in full 2026-10-05. Enumerates every credential OPOR administers — Accountants … Electricians … Oil and Solid Fuel Technicians … Plumbers … Propane & Natural Gas Technicians … Door-to-Door Home Repair Sellers … There is NO 'contractor' or 'general contractor' entry. This is the official basis for the verified absence of any statewide Maine contractor license (REQ-ME-NO-GC-LICENSE-001) and for CONFLICT-ME-001's resolving side.