HVAC Technician License in Iowa — Requirements, Fees & Exam

How to get licensed as an HVAC technician in Iowa: issuing board, requirements, exam, fees, renewal, and continuing education — verified from official sources.

Source-verified

Requirements below are drawn from Iowa Plumbing and Mechanical Systems Board (Iowa Department of Inspections, Appeals, and Licensing) (official site) and last verified July 24, 2026. Boards change fees and rules often — confirm before acting.

Requirements at a glance

Who must be licensed — Iowa licenses the individual AND the business: Iowa is a dual-licensing state. Iowa Code 105.10(1) makes it unlawful, except as provided in 105.11, to 'operate as a contractor or install or repair plumbing, mechanical, HVAC, refrigeration, sheet metal, or hydronic systems without obtaining a license issued by the board.' So the INDIVIDUAL doing the work must personally hold a board license (apprentice, journeyperson, or master in the applicable discipline) — an employed HVAC technician is not covered by anyone else's license and must at minimum be a licensed apprentice working under supervision. Separately, 105.10(2) requires that a person engaged in the BUSINESS of designing, installing, or repairing HVAC/refrigeration systems employ at all times a licensed master actively in charge of the work; a sole proprietor doing the work must personally be a licensed master. And 105.18(2)(d) requires the contracting business to hold a contractor license. credential_holder is 'individual' because the worker personally holds a state license; the contractor license is an additional, business-level credential on top.
Apprentice, journeyperson, master ladder: Apprentice: enroll in a U.S. DOL-registered apprenticeship and work under a licensed journeyperson or master (105.18(2)(a)). Journeyperson: four years of practical experience as a licensed apprentice (through a DOL-registered program since Jan 1, 2010) plus passing the Iowa journeyperson exam in the discipline (105.18(2)(b)); OR hold a master license in the same discipline from another jurisdiction. Master: hold a journeyperson license with two years of experience (or an out-of-state master license), and pass the Iowa master exam (105.18(2)(c); DIAL Master License page). Helper experience does not count toward a journeyperson license (105.11(7)).
Examinations — Kirkwood Community College: The board adopts an industry-standardized examination for each license type (Iowa Code 105.5(4)). Applicants submit an Exam Approval Application with a $35 fee per trade-discipline exam, wait up to two weeks for approval, then schedule the exam through the board's approved testing provider, Kirkwood Community College, at one of 15 Iowa testing sites, paying the exam fee directly to Kirkwood (currently ~$99 per attempt for a journeyperson exam, ~$95 for a master exam). A person who passes both the HVAC-refrigeration and hydronic exams at a level is issued the combined mechanical license at that level without a separate mechanical exam.
Contractor insurance, surety bond, and master of record: A contractor-license applicant must provide evidence of public liability insurance with a minimum of $500,000 coverage (issued by an insurer licensed in Iowa, naming DIAL as certificate holder and not cancelable without 10 days' notice) and a surety bond of at least $5,000 guaranteeing the contractor's performance to its customers (Iowa Code 105.19; DIAL Contractor License page). The contractor must hold an active master license or employ a 'master of record' — an individual with an active master license responsible for and actively in charge of the discipline's work. If the master of record leaves, the contractor has up to six months to identify a new one after notifying the board within 30 days.
Contractor registration under chapter 91C: Beyond the PMSB contractor license, a contractor must register with DIAL as a contractor under Iowa Code chapter 91C; the single application covers both. The registration requires an Iowa unemployment insurance (UI) number even if the contractor has no employees, proof of workers' compensation insurance if it does, and, for out-of-state contractors, a $25,000 surety bond. A self-employed contractor who does not work with or for other contractors in the same construction phases and pays no more than $2,000 per year to employ others may file a notarized fee-exemption form for the $150 registration fee (not the license fee).
Continuing education (8 hours per 3-year term): Each master or journeyperson license requires 8 hours of board-approved continuing education per three-year renewal term (Iowa Code 105.20(5); DIAL Continuing Education page). For an HVAC-refrigeration license the 8 hours break down as 2 hours mechanical code, 4 hours HVAC/R discipline, and 2 hours safety (Iowa Occupational Safety & Health). For a mechanical license the 4 discipline hours may be any combination of HVAC/R, hydronics, and sheet metal. At least half of the hours must be earned in person; up to half may be online. Holding multiple mechanical licenses raises the requirement (e.g., 14 hours) and plumbing-plus-mechanical raises it to 16. Apprentices need no CE, and there are exemptions (first renewal after moving from apprentice to journeyperson, active military service, out-of-state residence with an equivalent license, etc.).
Statewide preemption of local licensing: Iowa Code 105.17 preempts and supersedes all plumbing, mechanical, HVAC-refrigeration, sheet metal, hydronic, and contracting LICENSING provisions of cities and counties; since July 1, 2009 local licensing provisions are null and void (except reciprocal licenses under 105.21). A person licensed by the board may perform the licensed work anywhere in Iowa without a separate local trade license. Local governments may still charge construction permit fees and inspection fees (105.17(2)).
Reciprocity: The board may license a nonresident without examination who is licensed under a similar statute in another state, if that state grants Iowa licensees the same reciprocal privilege (Iowa Code 105.21). In practice the board's only executed reciprocity agreement (approved May 2016 with the South Dakota State Plumbing Commission) is limited to the journeyperson and master PLUMBING licenses — it does not cover HVAC/mechanical. An out-of-state master in the same discipline can instead use the exam-and-experience path, and a person holding a master-level license in another jurisdiction may apply for the Iowa journeyperson license in that discipline.

Legal basis

Iowa Plumbing and Mechanical Systems Board (Iowa Department of Inspections, Appeals, and Licensing) administers HVAC technician licensing in Iowa. Every figure below is verified against the board’s own official pages and dated. Who must personally hold a credential — the contractor, the business, or the individual worker — is set out under Requirements.

What it’s called

Iowa does not issue a single credential called an ‘HVAC license.’ The state credentials an INDIVIDUAL as an apprentice, journeyperson, or master in the HVAC-refrigeration discipline (covering HVAC and refrigeration) or the broader mechanical discipline (HVAC, refrigeration, sheet metal, and hydronic), and separately licenses the contracting BUSINESS as a plumbing and mechanical systems contractor - all issued by the Iowa Plumbing and Mechanical Systems Board within the Department of Inspections, Appeals, and Licensing (DIAL). Searches for an ‘Iowa HVAC license,’ ‘AC license,’ ‘mechanical license,’ or ‘HVAC contractor license’ map to these credentials. A worker doing HVAC installation or repair needs a personal board license (apprentice at minimum) - being an employee of a licensed contractor is not enough - which distinguishes Iowa from states (like Arizona) that license only the contracting business. Separately, EPA Section 608 refrigerant-handling certification is a FEDERAL credential for technicians who handle refrigerants and is neither issued by nor a substitute for any Iowa license; ‘EPA certification’ is not the Iowa HVAC license.

License types & fees

Type	Experience	Exam	Fee
Apprentice (mechanical / HVAC-refrigeration)	No experience required to enter. The applicant files an application establishing the minimum requirements the board adopts, certifies that the person will work under the supervision of a licensed journeyperson or master in the applicable discipline, and must be enrolled in an applicable apprenticeship program registered with the U.S. Department of Labor Office of Apprenticeship (Iowa Code 105.18(2)(a)). An apprentice works as an employee under the supervision of a master or journeyperson while completing the DOL-registered program; helper time does not count as apprentice experience (105.11(7)).	No examination is required for the apprentice license.	$50 for a three-year apprentice license (IAC 641-28.1(1)(a)); prorated using a one-sixth deduction for each six-month period if issued for less than three years. A $25 paper application fee applies to paper filings. Apprentices are not required to complete continuing education to renew.
Journeyperson HVAC-Refrigeration	At least four years of practical experience as a licensed apprentice; since January 1, 2010 that experience must be through an apprenticeship training program registered with the U.S. Department of Labor Office of Apprenticeship (Iowa Code 105.18(2)(b)(1)(c)). An HVAC-refrigeration license lets the individual perform work defined as HVAC and refrigeration (105.18(2)). Alternatively, a person who holds a master-level license in the same discipline from another jurisdiction may apply for the Iowa journeyperson license.	Pass the Iowa journeyperson HVAC-refrigeration licensing examination (105.18(2)(b)(1)(b)). Applicants first submit an Exam Approval Application ($35 per trade-discipline exam) to the board, then schedule the exam through the board's approved testing provider, Kirkwood Community College, at one of 15 Iowa testing sites; the examination fee (currently $99 per attempt for a journeyperson exam) is paid directly to Kirkwood. Note: an individual who separately passes both the journeyperson HVAC-refrigeration and journeyperson hydronic examinations qualifies for a journeyperson mechanical license without taking the mechanical examination (105.18(2)(b)(3)).	$180 for a three-year journeyperson license (IAC 641-28.1(1)(b)); prorated for a shorter first term. Exam Approval Application $35 (to the board) plus the Kirkwood exam fee (~$99/attempt) are separate. A 30% multiple-license discount applies when two or more master/journeyperson/contractor licenses for the same person are purchased in one transaction (does not apply to the paper fee, late fees, or contractor registration).
Master HVAC-Refrigeration	To sit for the master examination the applicant must have either (a) a journeyperson license with two years of work experience, or (b) a master license in another jurisdiction (Iowa Code 105.18(2)(c); DIAL Master License page). The applicant must previously have been a licensed journeyperson or master in the applicable discipline. A master plans or superintends the design, installation, or repair of HVAC/refrigeration work and may perform all journeyperson-level work.	Pass the Iowa master HVAC-refrigeration licensing examination. Exam Approval Application $35 per trade-discipline exam (to the board), then schedule with Kirkwood Community College; the master examination fee (currently $95 per attempt) is paid directly to Kirkwood. Passing both the master HVAC-refrigeration and master hydronic exams separately qualifies the individual for a master mechanical license without the mechanical exam (105.18(2)(c)(2)).	$240 for a three-year master license (IAC 641-28.1(1)(c)); prorated for a shorter first term. Exam Approval Application $35 and the Kirkwood exam fee (~$95/attempt) are separate. A master license is also the credential that lets an individual serve as the 'master of record' a contractor must hold or employ.
Mechanical (journeyperson or master) — the broad HVAC/refrigeration/sheet metal/hydronic license	Same journeyperson (four years registered apprenticeship) or master (journeyperson-plus-two-years, or out-of-state master) pathway as above, applied to the mechanical discipline. A mechanical license lets an individual perform all work defined as HVAC, refrigeration, sheet metal, and hydronic (Iowa Code 105.18(2)) — the widest individual credential. A master or journeyperson mechanical license holder is NOT required to also obtain HVAC-refrigeration, sheet metal, or hydronic sub-licenses (105.10(3)).	Pass the Iowa mechanical journeyperson or master examination, OR reach the mechanical license by passing both the HVAC-refrigeration and hydronic exams at the same level (105.18(2)(b)(3) and (c)(2)). Exam Approval Application $35 per exam plus the Kirkwood exam fee.	Journeyperson mechanical $180 or master mechanical $240 (IAC 641-28.1). There is a $50 fee to combine an active HVAC-refrigeration or hydronics license into a mechanical license (IAC 641-28.1(12); does not apply at reissue), and active HVAC-refrigeration + hydronics licenses of the same level can be combined into a single mechanical license at renewal.
Contractor (plumbing and mechanical systems contractor)	A contractor is the person or entity that provides HVAC/refrigeration/mechanical services on a contractual basis (Iowa Code 105.2(3)). To be licensed as a contractor the applicant must be at least 18, file an application and fees, maintain a permanent place of business, and either hold an active master license or employ at least one person holding an active master license ('master of record') in each discipline in which the contractor performs chapter-105 work (105.18(2)(d)). A master may be master of record for only one contractor per discipline at a time absent board approval.	No separate contractor trade examination; the trade competency is supplied by the master of record. The contractor must also register as a contractor with DIAL under Iowa Code chapter 91C.	$250 for a three-year contractor license PLUS a $150 contractor registration fee (Iowa Code chapter 91C) submitted on the same application = $400 for a new or renewing contractor (IAC 641-28.1(1)(f); DIAL fee table). Requirements: public liability insurance with minimum coverage of $500,000; a surety bond of at least $5,000 (guaranteeing the contractor's performance to its customers); proof of workers' compensation insurance if the contractor has employees; and an Iowa unemployment insurance number even with no employees. Out-of-state contractors must also file a $25,000 surety bond for the DIAL registration. Self-employed contractors meeting the chapter-91C criteria may file a notarized fee-exemption form for the $150 registration portion (not the $250 license fee).

Who does NOT need this license — exemptions

Iowa licenses HVAC/mechanical work at the state level, and Iowa Code 105.11 (‘Chapter inapplicability’) lists who is NOT required to be licensed, plus 105.10(3) removes a licensing burden inside the license structure. Read together with 105.11 and 105.10, the exemptions are: (1) ENGINEERS, ARCHITECTS, AND RELATED PROFESSIONALS - a person licensed as an engineer (ch. 542B), a manufactured-home retailer or certified installer (ch. 103A), an architect (ch. 544A), or a landscape architect (ch. 544B) ‘who provides consultations or develops plans or other work concerning plumbing, HVAC, refrigeration, sheet metal, or hydronic work and who is exclusively engaged in the practice of the person’s profession.’ (2) UTILITY, RAILROAD, AND INDUSTRIAL EMPLOYEES - employees of municipal utilities, electric membership or cooperative associations, public utility corporations, rural water associations or districts, railroads, or ‘commercial retail or industrial companies performing manufacturing, installation, service, or repair work for such employer to hold licenses while acting within the scope of their employment’ - BUT this exemption ‘does not apply to employees of a rate-regulated gas or electric public utility which provides plumbing or mechanical services as part of a systematic marketing effort, as defined pursuant to section 476.80.’ (3) HOMEOWNER ON A PRINCIPAL RESIDENCE - an owner performing work on the owner’s principal residence ‘if such residence is an existing dwelling rather than new construction and is not larger than a single-family dwelling, or farm property, excluding commercial or industrial installations or installations in public use buildings or facilities’; to qualify, the residence ‘shall qualify for the homestead tax credit.’ (4) UNION MEMBERSHIP - no person may be required to be a labor-union member in order to be licensed. (5) LP-GAS-QUALIFIED PERSONS - a person qualified under the administrative rules on storage and handling of liquefied petroleum gases ‘while engaged in installing, servicing, testing, replacing, or maintaining propane gas utilization equipment, or gas piping systems of which the equipment is a part, and related or connected accessory systems or equipment necessary to the operation of the equipment.’ (6) CERTIFIED WELL CONTRACTORS - a person meeting the requirements for a certified well contractor (sec. 455B.190A) while working on a water system, water well, well pump, or well equipment and connected accessory systems. (7) HELPERS - a helper engaged in general manual labor while assisting an apprentice, journeyperson, or master need not obtain a license; ‘Experience as a helper shall not be considered as practical experience for a journeyperson license.’ (8) CHAPTER 100C WORK - a person performing work subject to chapter 100C (electricians). (9) GOVERNMENT EMPLOYEES - an employee of any unit of state or local government (including cities, counties, or school corporations) ‘performing work on a mechanical system or plumbing system, which serves a government-owned or government-leased facility while acting within the scope of the government employee’s employment.’ (10) MANUFACTURER / WHOLESALE-SUPPLIER PERSONNEL - employees of manufacturers, manufacturer representatives, or wholesale suppliers who provide consultation or develop plans, ‘or who assist a person licensed under this chapter in the installation of mechanical or plumbing systems.’ (11) HEALTH-CARE / CARE-FACILITY OWNERS - an owner or operator of a licensed health care facility (ch. 135C), assisted living center (ch. 231C), hospital (ch. 135B), adult day care center (ch. 231D), or certified retirement facility (ch. 523D) performing work on the facility, ’except for projects that exceed the dollar amount specified as the competitive bid threshold in section 26.3.’ (12) PUBLIC-RIGHT-OF-WAY PIPE LAYING - a person laying pipe that originates or connects to pipe in the public right-of-way, provided ’the person shall not make any interior pipe connections within a building under this exemption’; local jurisdictions may still require licensure by ordinance or bid specification. (13) RENTAL-PROPERTY ROUTINE MAINTENANCE - a rental-property owner or such an owner’s employee performing routine maintenance on the rental property (routine maintenance under 105.2(17) excludes replacing furnaces, boilers, cooling appliances, or water heaters over 100 gallons). (14) VOLUNTEER / NON-PAID WORK - a person performing work on a volunteer, non-paid basis or assisting a property owner performing non-paid work on the owner’s principal residence. Finally, inside the license structure, 105.10(3) provides that a master or journeyperson MECHANICAL license holder is not required to obtain a separate HVAC-refrigeration, sheet metal, or hydronic license (nor any special restricted sublicense of those) to perform that work, and 105.18(3)(d) exempts a master or journeyperson mechanical or HVAC-refrigeration licensee from needing a special electrician’s license (ch. 103) to disconnect and reconnect existing air conditioning and refrigeration systems. Iowa Code 105.11 does not contain a general small-dollar ‘handyman’ exemption for HVAC work.

Fees

Three-year license fees (IAC 641-28.1, the board’s fee rule): apprentice $50, journeyperson $180, master $240, medical gas pipe certificate $75, special restricted license $50, and contractor license $250 PLUS a $150 chapter-91C contractor registration fee submitted together ($400 total for a contractor). New licenses issued for less than three years are prorated by a one-sixth deduction per six-month period. Separate charges: Exam Approval Application $35 per exam (to the board), the Kirkwood examination fee (~$99/attempt journeyperson, ~$95/attempt master, paid to Kirkwood), and a $25 paper application fee for paper filings. Combining two or more active master/journeyperson/contractor licenses for the same person in one transaction earns a 30% discount on the license fees (not on the paper fee, late fees, or the $150 registration). There is a $50 fee to combine an active HVAC-refrigeration or hydronics license into a mechanical license (IAC 641-28.1(12)). Late renewal: no late fee if renewed by July 31, a $60 late fee August 1-31, a $100 late fee thereafter (and the licensee may not work after September 1); a license lapsed more than one year must be reinstated at the full fee. Fee waivers: the board waives fees for a first-time Iowa applicant whose household income is at or below 200% of the federal poverty guidelines, and waives the initial application fee and one renewal fee for an applicant honorably or generally discharged from military service within the preceding five years (IAC 641-28.3).

Exam

Iowa requires individual license applicants (journeyperson and master) to pass an industry-standardized examination for each license type adopted by the board (Iowa Code 105.5). The process: submit an Exam Approval Application to the Plumbing and Mechanical Systems Board with a $35 fee per trade-discipline exam; after approval (up to two weeks), schedule the examination through the board’s approved testing provider, Kirkwood Community College, at one of 15 testing sites across Iowa; and pay the examination fee directly to Kirkwood for each attempt (currently about $99 per attempt for a journeyperson exam and $95 for a master exam). A journeyperson applicant must also show four years of practical experience as a licensed apprentice in a U.S. DOL-registered program; a master applicant must hold a journeyperson license with two years’ experience (or an out-of-state master license). An individual who separately passes both the HVAC-refrigeration and hydronic examinations at the same level is issued the combined mechanical license without taking the mechanical examination. Apprentices and (generally) contractors sit no board examination — the contractor’s trade competency is supplied by its master of record.

Renewal & continuing education

Three-year renewal cycle. All Plumbing and Mechanical Systems licenses expire on the same date every three years, on June 30, regardless of issue date (Iowa Code 105.9(7), 105.20(1)); the current licensing period runs July 1, 2026 through June 30, 2029, and the next runs July 1, 2029 through June 30, 2032. Renewal is by application and fee without re-examination (105.20(2)) but requires completion of the continuing-education hours for the term. A 30-day grace period after expiration allows completion of renewal requirements without penalty (105.20(5)(b)); late fees then apply ($60 after August 1, $100 after September 1), and a license lapsed more than one year must be reinstated with a new application and full fee. New licenses issued mid-cycle are prorated by a one-sixth deduction per six-month period. 8 classroom hours of board-approved continuing education per three-year term for each master or journeyperson license (Iowa Code 105.20(5); minimum set by statute). For an HVAC-refrigeration license the 8 hours are 2 hours mechanical code, 4 hours HVAC/R discipline, and 2 hours safety (Iowa Occupational Safety & Health); for a mechanical license the 4 discipline hours may be any combination of HVAC/R, hydronics, and sheet metal. At least half of the hours must be earned in person and up to half may be online; courses and instructors must be board-approved. Holding multiple mechanical licenses raises the requirement to 14 hours, and holding a plumbing license plus one or more mechanical licenses raises it to 16 hours. Apprentices need no CE. Exemptions include the first renewal after moving from apprentice to journeyperson, active military service during the period, residing and being licensed (with equivalent CE) outside Iowa, and certain government-employee and hardship situations.

How to apply

Applications are handled by Iowa Plumbing and Mechanical Systems Board (Iowa Department of Inspections, Appeals, and Licensing). Start at the official application page .

Frequently asked questions

Does Iowa require an HVAC license?

Yes. Iowa licenses HVAC work at the state level through the Plumbing and Mechanical Systems Board (within the Department of Inspections, Appeals, and Licensing). Iowa Code 105.10 makes it unlawful to install or repair HVAC, refrigeration, or mechanical systems without a board license. Iowa is a dual-licensing state: the INDIVIDUAL doing the work must hold a board license (apprentice, journeyperson, or master), and the contracting BUSINESS must hold a contractor license and employ a licensed master of record. An employed technician is not covered by the company’s license and must at least be a licensed apprentice working under supervision.

What HVAC licenses does Iowa issue?

For HVAC the board issues apprentice, journeyperson, and master licenses in the HVAC-refrigeration discipline (HVAC and refrigeration work) and in the broader mechanical discipline (HVAC, refrigeration, sheet metal, and hydronic work). Sheet metal and hydronic are separate disciplines within the mechanical family. Separately, a contracting business holds a plumbing and mechanical systems contractor license. A master or journeyperson mechanical license holder does not need separate HVAC-refrigeration, sheet metal, or hydronic sub-licenses (105.10(3)).

How much does an Iowa HVAC license cost?

Three-year license fees are $50 (apprentice), $180 (journeyperson), and $240 (master). A contractor pays $250 for the contractor license plus a $150 contractor registration fee ($400 total). On top of the license fee are a $35 Exam Approval Application (to the board) per exam and the Kirkwood Community College examination fee (about $99 per attempt for a journeyperson exam, $95 for a master exam). Combining two or more master/journeyperson/contractor licenses for the same person in one transaction earns a 30% discount on the license fees. First-time applicants at or below 200% of the federal poverty guidelines, and recently discharged veterans, can have fees waived.

What experience and exams does Iowa require for an HVAC journeyperson?

A journeyperson HVAC-refrigeration applicant needs four years of practical experience as a licensed apprentice, completed through a U.S. Department of Labor-registered apprenticeship program (required since January 1, 2010), and must pass the Iowa journeyperson HVAC-refrigeration examination. The exam is scheduled through Kirkwood Community College after the board approves an Exam Approval Application. Someone who passes both the HVAC-refrigeration and hydronic journeyperson exams is issued the combined mechanical license without a separate mechanical exam.

Does Iowa require continuing education to renew an HVAC license?

Yes. Each master or journeyperson license requires 8 hours of board-approved continuing education per three-year renewal term. For an HVAC-refrigeration license that is 2 hours of mechanical code, 4 hours of HVAC/R discipline content, and 2 hours of safety (Iowa OSHA). At least half of the hours must be in person; up to half may be online. Holding multiple mechanical licenses raises the requirement to 14 hours, and a plumbing license plus mechanical licenses raises it to 16. Apprentices need no CE. Licenses are renewed every three years, expiring June 30 (the current period runs July 1, 2026 to June 30, 2029).

Do I need a separate city or county HVAC license in Iowa?

No. Iowa Code 105.17 preempts and supersedes all local plumbing, mechanical, HVAC-refrigeration, sheet metal, hydronic, and contracting LICENSING requirements; a person licensed by the state board can perform the licensed work anywhere in Iowa without a separate local trade license. Local governments may still charge construction-permit and inspection fees. Note also that EPA Section 608 refrigerant certification is a separate FEDERAL requirement for technicians who handle refrigerants and is not an Iowa license.

See every license and certification LicensingAtlas covers in Iowa.

Sources & verification

Last verified against these sources: July 24, 2026.

LicensingAtlas states licensing and certification requirements categorically from official sources. It is a reference, not legal or career advice, and requirements change frequently — confirm details with the issuing board before you act.