Idaho · HVAC licensing · official-source guide
Idaho licenses HVAC contractors, journeymen and apprentices at the state level through the Division of Occupational and Professional Licenses' Heating, Ventilation and Air Conditioning Board. Contractors must pass a board exam and post a $2,000 compliance bond; journeymen need 8,000 hours of supervised experience plus 576 hours of instruction, or 16,000 hours of experience, before testing.
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Idaho licenses heating, ventilation and air conditioning work at the state level. The Idaho Heating, Ventilation and Air Conditioning (HVAC) Board operates inside the Division of Occupational and Professional Licenses (DOPL), and the DOPL administrator enforces the requirements. The controlling law is Idaho Code Title 54, Chapter 50, Installation of Heating, Ventilation and Air Conditioning Systems, first enacted in 2003 and amended repeatedly since. The board's authority covers the design, construction, installation, improvement, extension and alteration of HVAC systems in residences, buildings and structures across the state, including property owned by the state or by a county, city or other political subdivision. The board also adopts the mechanical codes contractors must follow. As of this writing those are the 2018 International Residential Code, the 2018 International Fuel Gas Code and the 2018 International Mechanical Code, each as amended by board rule. Idaho Code section 54-5008 makes it unlawful to engage in the business, trade, practice or work of HVAC in the state without first passing the required examination and holding a state certificate of competency; that certificate is not transferable between people or companies. The HVAC Board also runs the Canyon County residential and commercial permitting workload directly since September 1, 2023, after Canyon County discontinued its own local mechanical permit program and shifted new applications to DOPL. Contractors and property owners can reach the board by email at BCRE-Licensing@dopl.idaho.gov or by phone at (208) 334-3233 for questions specific to a project or application.
Sourcesdopl.idaho.gov 1legislature.idaho.gov 2dopl.idaho.gov 3
Idaho Code section 54-5009 sets four classifications of competency for HVAC work: apprentice, journeyman, contractor and specialty contractor, with specialty apprentice and specialty journeyman falling under the apprentice and journeyman classifications respectively. In practice the HVAC Board issues certificates or registrations in nine categories, each carrying its own fee and term. Apprentice registration runs one year at the current published rate. Specialty apprentice and limited heating specialty apprentice registrations run two years. Journeyman, specialty journeyman, limited heating specialty journeyman, contractor, specialty contractor and limited heating specialty contractor certificates run three years at the current published rate, though Idaho Code section 54-5012 sets the underlying fee on an annual basis and allows the division to issue a certificate for up to three years at that annual rate. A specialty contractor or specialty journeyman works in a defined slice of the trade, such as gas piping, gas appliance installation or decorative gas-fired appliances, rather than the full scope of HVAC work. A separate limited heating specialty classification, created for liquid propane gas work, is narrower still and excludes boilers, hydronic systems, ducted forced air systems, ventilating and air conditioning systems, systems rated above 300,000 BTU input, and solid fuel or electric fueled systems. Every classification below contractor level must work under supervision: an apprentice under a journeyman or contractor, and a specialty apprentice under a journeyman, specialty journeyman, contractor or specialty contractor.
Idaho Code section 54-5003 defines an HVAC contractor as any person who fabricates, installs, maintains, services or repairs warm air heating and water heating systems, heat pumps, boilers, pool heaters, space heaters, decorative gas and solid fuel appliances, gas or electric water heaters, ventilating systems with blowers and plenum chambers, and air conditioning systems, including the ducts, registers, flues and thermostatic controls that go with them. A journeyman performs the same category of installation, improvement, extension, alteration or repair work as his or her principal occupation, but does so in the employ of and under the direction of a contractor. An apprentice is learning and assisting with that same work under the direct supervision of a journeyman or contractor and may not perform HVAC work unsupervised. A specialty contractor, specialty journeyman or specialty apprentice does the same kind of supervised work, but limited to a specific aspect of the trade named on the certificate, such as gas piping or decorative gas-fired appliances; a certificate for hearth and barbecue product installation also carries authority for the low-voltage wiring needed to complete that installation. Idaho Code section 54-5015 clarifies how the trades overlap at the edges: holders of a current HVAC or electrical certificate may install electrical space heaters, short disconnect-to-unit wiring runs, and most ventilating fans, and holders of an HVAC or plumbing certificate may install boilers, fuel piping and hydronic or steam piping, though plumbing certificate holders may not install HVAC control wiring regardless of voltage.
Sourceslegislature.idaho.gov
Idaho Code section 54-5002 lists who does not need a certificate of competency to do HVAC work. An owner or contract purchaser may install or maintain an HVAC system on their own single or duplex family dwelling and its accessory buildings, provided the work still meets the installation and repair standards in the chapter. Farm buildings outside an incorporated city are exempt, defined narrowly as structures built to house farm implements, hay, grain, poultry, livestock or horticultural products, and not a home, a regular workplace, a public-facing building or conditioned livestock housing. Logging, mining or construction camps are exempt when the HVAC work conforms to Department of Environmental Quality recommendations. An employer that regularly employs its own maintenance or construction HVAC journeymen may have those employees work on its own premises without a separate contractor certificate, though new construction, alterations and extensions still have to meet the chapter's minimum standards. Modular buildings built in Idaho for installation outside the state are exempt, as long as any such building coming back into Idaho carries the division's insignia of approval. A tax-exempt, 501(c)(3) nonprofit home-building organization, including a religious corporation, and its volunteers are exempt when building a single-family dwelling, provided the organization names a primary contact for inspectors. High school students in a board-recognized program that includes HVAC installation as a formal component are exempt from apprentice registration while working residential installations under constant supervision of a licensed journeyman and under a permit, though those student hours do not count toward the apprentice work-hour requirement.
Sourceslegislature.idaho.gov
Board rule IDAPA 24.39.70.100.02 sets two paths to sit for the journeyman certificate exam. An applicant can show at least 8,000 hours of work experience as a registered apprentice, plus 576 hours of board-approved classroom instruction, with lab time from that instruction creditable toward the 8,000 hours. Or an applicant can show 16,000 hours of HVAC experience gained under the rules of whatever jurisdiction the applicant worked in, with no instruction requirement attached to that path. Idaho Code section 54-5010 lets a registered apprentice sit for the journeyman exam once the required related instruction and hours are complete, and applications lapse if the applicant does not appear for the exam within one year of filing. A specialty journeyman needs a minimum of 2,000 hours of specialty-related experience under Board rule 100.04, plus either a passing exam score or at least 60 hours of education in fuel gas code and piping installation methods. A limited heating specialty journeyman, the liquid propane gas specialty track defined in Idaho Code section 54-5003(10), needs 120 hours of board-approved career technical education in LP gas specialty education plus 2 years of trade experience, and either passes an exam or completes the education path; the exam for this track is developed by the state board for career technical education and approved by the HVAC Board. A contractor or specialty contractor certificate does not carry its own separate hour requirement in statute or rule beyond passing the designated exam and posting the required bond.
Idaho's HVAC certification exams run through PSI, a third-party testing vendor, rather than through DOPL directly. Candidates register at PSI's test-taker site, create an account, pick the exam matching the certificate they are pursuing, wait for automated application acceptance, then schedule and pay for a seat; PSI's phone support line is available for registration problems. Each exam has its own candidate bulletin on the PSI site describing the study guide blueprint and reference materials allowed for that specific exam. DOPL publishes a Contractors' Business and Law Reference Manual as one of the reference materials candidates are expected to bring. That manual, and any other allowed reference material, must be printed and placed into a three-ring loose-leaf binder before the exam date; candidates may pre-highlight, underline and permanently index those materials, but may not write in them during the exam itself, and loose papers or temporary markers such as sticky notes are prohibited and will be confiscated at the test center. After a passing score, the candidate applies for the actual license or certificate through DOPL's online system at edopl.idaho.gov by creating a customer account and submitting the application and required fee; passing the exam alone does not put a certificate in effect. Idaho Code section 54-5010 requires the HVAC Board to set times and places for exams and to notify applicants, and applications for examination expire and are cancelled if the applicant does not sit for the exam within one year of filing.
Sourcesdopl.idaho.gov
The HVAC Board publishes a $35 application fee that applies across classifications. Beyond that, published license, renewal and reinstatement fees vary by classification and term length. An apprentice registration costs $10 to issue, $10 to renew and $10 to reinstate, on a one-year term at the currently published rate. A specialty apprentice or limited heating specialty apprentice registration costs $20 to issue, $20 to renew and $20 to reinstate, on a two-year term. A journeyman, specialty journeyman or limited heating specialty journeyman certificate costs $150 to issue, $75 to renew and $150 to reinstate, on a three-year term. A contractor, specialty contractor or limited heating specialty contractor certificate costs $225 to issue, $150 to renew and $225 to reinstate, also on a three-year term. These published amounts match the annual rates set in Idaho Code section 54-5012 when multiplied out over the certificate term; that statute sets the underlying annual fee at $75 for a contractor or specialty contractor's initial certificate and $50 for its renewal, and $50 for a journeyman or specialty journeyman's initial certificate and $25 for its renewal, with the division permitted to issue certificates at that annual rate for up to three years at a time, and it sets the apprentice and specialty apprentice registration fee at $20 for a two-year registration. A lapsed certificate can be revived within one year of expiration for a $35 revival fee on top of the full renewal fee and any outstanding penalties.
Idaho Code section 54-5007 requires an HVAC contractor or specialty contractor to provide a bond of $2,000, or evidence of equivalent coverage through a corporate industry group bond acceptable to the board, before the state will issue a contractor-level certificate of competency. Board rule IDAPA 24.39.70.100.03 confirms that same $2,000 compliance bond amount and specifies that it must stay in effect for the full duration of the certificate period, meaning a contractor renewing a multi-year certificate must keep the bond current for that whole term, not just at initial issue. This bond protects against losses tied to the contractor's licensed HVAC work rather than functioning as a savings account or a cap on the contractor's liability. Neither Idaho Code Chapter 50 of Title 54 nor board rule IDAPA 24.39.70 sets a separate state-mandated minimum for commercial general liability insurance, workers' compensation coverage amounts, or any other insurance product tied specifically to holding an HVAC certificate of competency; the statute and rule speak only to the compliance bond. That does not mean insurance is optional in practice: Idaho's workers' compensation law separately requires most employers to carry coverage for employees regardless of trade, and a customer, general contractor, lender or landlord can and often does require an HVAC contractor to carry general liability insurance as a condition of a specific job, even though the HVAC Board itself does not check for it when issuing or renewing a certificate.
Idaho Code section 54-5016 makes it unlawful, as of January 1, 2005, to construct, install, improve, extend or alter an HVAC system anywhere in the state without first getting a permit from the authority having jurisdiction, though no permit is required for repair or maintenance of an existing system. Board rule IDAPA 24.39.70.500 sets the state permit fee schedule where DOPL is the issuing authority. A residential permit starts with a $100 base fee, plus $30 for the first furnace, heat pump, air conditioner, boiler or similar fixture and $15 for each additional one, plus $15 for the first exhaust or ventilation duct and $5 for each additional duct, plus $5 per fuel gas appliance outlet and $5 per hydronic system zone. Miscellaneous fees include $65 per inspection for a mobile, manufactured or modular home, $65 per hour for a requested inspection or a plan check or technical service, and a $45 fee to transfer a permit to a new eligible party with the original holder's notarized written consent. Idaho Code section 54-5016 also lets local governments keep charging their own permit and inspection fees in places where a city or county ordinance regulates and enforces HVAC work directly, and it lets a plumbing or electrical permit that already covers part of an HVAC installation stand in for a separate HVAC permit on that same portion of work, so a contractor is not charged twice for one inspection.
Idaho Code section 54-5013 sets a certificate of competency to expire 24 calendar months from its date of issue, or on the last day of the month of the certification period, unless renewed, revoked or suspended sooner; as described above, the division can also issue certificates at the annual rate for up to three years at a time, which is how the published three-year contractor and journeyman terms work. A holder can request renewal up to 60 days before the expiration date. An expired certificate can be revived within one year of the first day of the final month of the old certification period by paying a $35 revival fee on top of the full renewal fee and any outstanding civil penalties, permit fees or other charges. If a certificate is revoked outright, the holder must wait a full year from the date of revocation before applying for a brand new certificate, and that new application still requires proof that all outstanding penalties and fees have been paid. Neither Idaho Code Chapter 50 of Title 54 nor board rule IDAPA 24.39.70 lists a continuing education hour requirement tied to renewing an existing journeyman, specialty journeyman or contractor certificate; the hour and classroom instruction requirements described earlier apply to first earning a certificate, not to keeping one current. Journeymen must, however, keep up with any trade-required classes the board directs as part of that classification under Idaho Code section 54-5009.
Sourceslegislature.idaho.gov
Idaho does not publish a formal reciprocity or license-recognition agreement with any other state's HVAC licensing body in either Idaho Code Chapter 50 of Title 54 or board rule IDAPA 24.39.70. What the rule does allow is portability of hours: an applicant for a journeyman, specialty journeyman or limited heating specialty journeyman certificate can count work experience gained in another jurisdiction toward Idaho's 8,000-hour, 16,000-hour or 2,000-hour experience thresholds, as long as that experience complied with the requirements of the jurisdiction where it was earned. That experience credit does not replace Idaho's own exam; an out-of-state journeyman or contractor still has to pass the Idaho-designated exam and pay Idaho's fees to hold an Idaho certificate. Members of the armed forces, honorably discharged veterans, and the spouses of active members or veterans are entitled to benefits under Idaho Code sections 67-9401 through 67-9407, which DOPL describes as including expedited processing of an application and credit for military training relevant to the license being sought. Active-duty military members may also be eligible for a waiver of renewal fees and other renewal requirements under Idaho Code section 67-2606. DOPL directs anyone with questions about how these benefits apply to a specific HVAC application to contact the division by email at dopl@dopl.idaho.gov or by phone at (208) 334-3233 rather than assuming eligibility automatically.
Idaho Code section 54-5022 makes it a misdemeanor for a person, firm, partnership, company, association or corporation, acting through a member, representative or agent, to engage in the business, trade, practice or work of HVAC without a certificate of competency or registration, to perform work without the required permit, to violate any provision of Chapter 50 of Title 54 or the board's rules, to refuse to perform a duty the administrator lawfully assigns within the given time, or to disobey a lawful order from the administrator. The statute backs that misdemeanor with a civil penalty set by administrative rule, capped at $1,000 for each offense, and treats each day a violation continues as a separate offense; a second violation only counts as an additional offense if it happens within one year of the first one. Board rule IDAPA 24.39.70.300 lists the specific acts that trigger that up-to-$1,000-per-count civil penalty: working without an active certificate or registration except where section 54-5002 exempts the work, knowingly employing someone without an active certificate or registration, performing outside the scope of a specialty certificate, working or employing an apprentice without required journeyman supervision, failing to get a permit, pay fees, post a permit or request an inspection, failing to make corrections within the allotted notice period, misrepresenting permit or inspection fees to a customer, advertising violations, and failing to comply with a lawful board or administrator order.
Idaho Code section 54-5014 requires every contractor or specialty contractor to display their certificate of competency, or a sign or card representing it, for public view at their place of business, and requires every journeyman, specialty journeyman, apprentice and specialty apprentice to keep their certificate or annual registration card available at all times while on the job. Board rule IDAPA 24.39.70.300.09 goes further on advertising specifically: it is a civil-penalty violation, capped at $1,000 per count, to advertise as an HVAC contractor without holding a current, valid HVAC contractor certificate of competency, and it is a separate violation to advertise as a contractor without including the contractor certificate of competency number in that advertisement. The rule defines advertising broadly, covering newspaper ads, telephone directory listings, community flyers or notices, and telephone, television, radio, internet or door-to-door solicitations, so the certificate number requirement is not limited to print media. A customer, general contractor or property manager can check whether a certificate is current and in good standing through DOPL's public license search tool on its online services portal, which covers HVAC contractors, journeymen and specialty certificate holders alongside every other DOPL-regulated occupation. Confirming a certificate number before hiring, and confirming that a quote or invoice actually carries that number, is a direct way to check that the advertising rule and the underlying certificate requirement are both being followed on a given job.
Sourceslegislature.idaho.gov 1files.dfm.idaho.gov 2edopl.idaho.gov 3
Idaho Code section 54-5015 gives only the DOPL administrator the authority to examine HVAC applicants and to grant or issue certificates of competency and apprentice registrations; no city or county anywhere in Idaho, including Boise, Meridian, Nampa or Idaho Falls, may require an HVAC contractor, specialty contractor, journeyman, specialty journeyman, apprentice or specialty apprentice to get an additional local certification or registration, or to pay an additional local fee, in order to work in that local jurisdiction, and no city or county may refuse to recognize a certificate DOPL has already issued under Chapter 50 of Title 54. That preemption is not absolute in every direction: the same section lets a city or county impose stricter public-safety rules on top of the state framework, and Idaho Code section 54-5016 separately lets a local government that has chosen, by ordinance, to adopt and enforce its own mechanical code keep charging its own permit and inspection fees for HVAC work inside its boundaries, including in areas it designates as an area of city impact. In practice, most Idaho jurisdictions rely on DOPL's statewide mechanical permit and inspection program rather than running a separate local one; Canyon County is a documented example, having operated its own residential and commercial HVAC permitting process before moving all new permit applications and inspection scheduling to DOPL's statewide system effective September 1, 2023. A contractor working across county lines in the Boise, Meridian, Nampa and Canyon County area should still confirm, project by project, which authority is currently issuing the permit for that specific job site.
Holding an HVAC certificate of competency does not by itself qualify a contractor to bid on Idaho government construction work. Idaho Code Chapter 19 of Title 54, the Public Works Contractors License Act, separately makes it unlawful under section 54-1902 to act as a public works contractor in Idaho without a Public Works Contractor (PWC) license issued by the DOPL administrator, unless a specific exemption applies. Section 54-1903 exempts, among other things, any single project involving multiple trades with an estimated cost under $100,000, and exempts a subcontractor working under a licensed Unlimited, AAA, AA or A class contractor when the subcontracted work itself is valued under $100,000; an HVAC contractor doing mechanical work as part of a larger public project at or above that threshold generally needs a PWC license or must subcontract under a properly licensed public works contractor. Section 54-1904 sets seven PWC license classes, Unlimited, AAA, AA, A, B, CC and C, each with its own maximum project size and its own fee; DOPL's currently published initial fees run from $160 for Class C up to $880 for Class Unlimited, with a Construction Manager class at $320. Separately, Idaho's Public Contracts Bond Act, Idaho Code section 54-1926, requires the contractor awarded a public building or public works contract of $50,000 or more to furnish the public body a performance bond and a payment bond, each for at least 85 percent of the contract amount.
An Idaho HVAC certificate of competency is a state credential and does not by itself satisfy a separate federal requirement that applies whenever a technician works on equipment that could release refrigerant. Under Section 608 of the Clean Air Act, EPA regulations at 40 CFR Part 82, Subpart F require any technician who maintains, services, repairs or disposes of equipment that could release refrigerant into the atmosphere to hold EPA Section 608 Technician Certification, earned by passing an EPA-approved test administered by an EPA-approved certifying organization. EPA defines a technician for this purpose as anyone who attaches or detaches hoses and gauges to measure appliance pressure, who adds or removes refrigerant, or who otherwise breaches the sealed system of a small appliance or a motor-vehicle-air-conditioner-like appliance, other than disposal; apprentices are exempt from the certification requirement only while closely and continually supervised by a certified technician, which lines up with how Idaho's own apprentice supervision rules work. EPA offers four certification types: Type I for small appliances, Type II for high- or very-high-pressure appliances other than small appliances and motor vehicle air conditioners, Type III for low-pressure appliances, and a Universal certification covering all equipment types, which requires the core test to be taken as a proctored exam rather than an open-book one. Section 608 credentials do not expire once earned. An Idaho HVAC contractor, journeyman or specialty journeyman whose work touches refrigerant-containing equipment, such as most air conditioning and heat pump service and repair, needs both the state certificate of competency and the applicable EPA Section 608 credential; one does not substitute for the other.
These are common details other guides publish about Idaho, but we could not verify them from the agency source. Confirm them directly before relying on them.
Yes. The Idaho Heating, Ventilation and Air Conditioning Board, part of the Division of Occupational and Professional Licenses, issues state certificates of competency to HVAC contractors, journeymen and apprentices under Idaho Code Chapter 50 of Title 54, and no local jurisdiction may add its own separate HVAC certification on top of that state certificate.
A contractor holds the business-level certificate, can post permits, and can employ other certificate holders; a journeyman does the same installation, repair and alteration work but only while employed by and under the direction of a contractor, and cannot hold a standalone contracting business under that certificate.
Under board rule IDAPA 24.39.70, an applicant needs at least 8,000 hours as a registered apprentice plus 576 hours of board-approved instruction, or alternatively 16,000 hours of HVAC experience without the instruction requirement, before sitting for the journeyman exam.
Idaho Code section 54-5007 requires a contractor or specialty contractor to post a $2,000 compliance bond for the certificate period. Neither the statute nor board rule sets a separate state-mandated general liability insurance minimum tied to the HVAC certificate itself.
The HVAC Board's published fees are a $35 application fee, then $225 to issue a three-year contractor certificate, $150 to renew it and $225 to reinstate it if it lapses, based on the board's fee schedule and the annual rates set in Idaho Code section 54-5012.
Idaho Code section 54-5013 sets certificates to expire 24 calendar months from issue, though the division commonly issues contractor and journeyman certificates at the annual rate for a three-year term; renewal can be requested up to 60 days before expiration.
No continuing education hour requirement for renewing an existing HVAC certificate appears in Idaho Code Chapter 50 of Title 54 or in board rule IDAPA 24.39.70. The hour and instruction requirements described in state sources apply to first earning a certificate, not to renewing one.
No. Idaho Code section 54-5015 gives the DOPL administrator exclusive authority to certify HVAC trades, and no city or county may require an additional local certification, registration or fee for an HVAC contractor, journeyman or apprentice to work there.
Idaho Code section 54-5022 makes it a misdemeanor to perform HVAC work without a certificate of competency or registration, or without the required permit, with a civil penalty of up to $1,000 for each offense and each day of violation counted as a separate offense.
Yes. Board rule IDAPA 24.39.70.300.09 makes it a civil-penalty violation to advertise as an HVAC contractor without a current certificate, or to advertise without including the contractor certificate of competency number, across print, broadcast, internet or door-to-door solicitation.
Yes. EPA Section 608 Technician Certification under 40 CFR Part 82, Subpart F is a separate federal requirement for anyone who services, maintains or disposes of equipment that could release refrigerant, and it applies on top of, not instead of, the Idaho state HVAC certificate.
DOPL's online services portal at edopl.idaho.gov includes a public license search covering HVAC contractors, journeymen and specialty certificate holders, so a customer or hiring contractor can check whether a certificate is current before work begins.
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