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HVAC · State license

How to get an HVAC license in Iowa

State law and licensing-board sources · Last reviewed October 11, 2026

Iowa licenses HVAC workers statewide through the Plumbing and Mechanical Systems Board, part of the Department of Inspections, Appeals, and Licensing (DIAL). The main HVAC licenses are HVAC-refrigeration and the broader mechanical license, which also covers sheet metal and hydronic (hot water and steam) systems. You start with an apprentice license: you must be 18, have a high school diploma or GED, and be in an apprenticeship registered with the U.S. Department of Labor. After four years you take the journeyperson exam (75% to pass), and two years later you can test for master. [1][2][3][4]

New to the trade?

Starting from zero in Iowa

In Iowa you need a state apprentice license before you work on HVAC systems as an apprentice, and you can't get one until you're 18 and have finished high school or a GED. First get hired by an HVAC or mechanical contractor that runs a registered apprenticeship, or apply to a union (UA) or open-shop (ABC of Iowa) program. Then apply for the $50 apprentice license on DIAL's license portal with your apprenticeship sponsor details. [1][2][3][9][15][18]

  • High school diploma or GED

    Required by state rule: "All apprentice applicants must have completed a high school education or attained GED equivalent" (Iowa Administrative Code 481-429.4). DIAL's apprentice page says the same. [2][3]

  • Minimum age

    18. The rule says an applicant for any type of plumbing or mechanical license must be at least 18. [2][3]

  • Register before you start work

    State law bars anyone from installing or repairing HVAC, refrigeration, sheet metal or hydronic systems without a board license, except helpers. To get the apprentice license you must be enrolled in a DOL-registered apprenticeship and give DIAL your apprentice ID number, start date, sponsor program number and sponsor name. The license is $50 for 3 years, prorated The board waives first-time fees if your household income is at or below 200% of the federal poverty guidelines. [1][3][9]

  • Helper jobs

    A helper doing general manual labor to assist a licensed apprentice, journeyperson or master doesn't need a license, but state law says helper experience doesn't count toward a journeyperson license. The licensee you help is responsible for your work. [1][7]

  • EPA 608 certification

    Federal rules require technicians who maintain, service, repair or dispose of equipment that could release ozone-depleting refrigerants to be certified under Section 608 of the Clean Air Act. [22]

  • Aptitude test and documents

    UA Local 125 in Cedar Rapids, which trains refrigeration fitters, asks applicants to upload a birth certificate, driver's license, high school transcript or GED certificate (it says a diploma alone isn't accepted) and NCRC test results. You schedule the NCRC test through a local IowaWORKS office Local 125 lists (319) 365-9474. [17][25][26]

  • Application windows

    As of October 2026, UA Local 125 takes applications at set openings on its website (its example: September 1, November and January 1). You may apply only at every other opening, up to 3 times a calendar year Call the training center at (319) 362-9259. ABC of Iowa apprentices must first be hired by a member company, which enrolls them; its winter daytime class registration runs November 4 to December 9, 2026. [18][25][27][28]

  • Pay while you learn

    UA Local 125's brochure says apprentices start at 40% of the journeyman rate with a 5% raise about every six months if work and school go well, plus health and pension benefits from day one. ABC of Iowa apprentices earn paid on-the-job training hours with their employer. [17][18]

  • Credit for prior training or military

    The board counts advanced standing or credit your apprenticeship gives for earlier experience, training or skills toward the 48 months before the journeyperson exam. The board waives the first application fee and one renewal fee for honorably or generally discharged veterans within five years of discharge. [2][9]

  • Still in high school?

    You can't hold an HVAC apprentice license until you're 18 and have your diploma or GED, and helper hours don't count toward a license. Iowa Workforce Development says more Iowa high schools offer registered apprenticeship and quality pre-apprenticeship programs that prepare you for an apprenticeship after graduation It suggests starting with your school counselor. Iowa's career and technical education (CTE) programs include an applied sciences, technology, engineering and manufacturing service area that covers construction, and Senior Year Plus concurrent enrollment and career academies let you take community college career and technical courses while in high school. [1][2][24][29][30]

Where to apply in IowaHow to get an apprenticeshipHelper jobs

Licensing office Iowa Plumbing and Mechanical Systems Board, Department of Inspections, Appeals, and Licensing (DIAL) · (866) 280-1521 [1][5]

Iowa HVAC license at a glance

Who issues licenses
Plumbing and Mechanical Systems Board, Iowa Department of Inspections, Appeals, and Licensing DIAL [1][5]
License types
HVAC-refrigeration, hydronic, mechanical (covers all of these plus sheet metal) and sheet metal Journeyperson only [1][4]
Apprentice license
Required Must be 18, a high school graduate or GED holder, and enrolled in a DOL-registered apprenticeship; $50 for 3 years [1][2][3][9]
Journeyperson experience
4 years of practical experience in a DOL-registered apprenticeship [1][11]
Journeyperson exam
Kirkwood Community College, open book, 75 questions, 2 hours, 75% to pass [2][10]
Master experience
2 years as a licensed journeyperson in the same discipline, then the master exam [2][12]
License fees
Apprentice $50, journeyperson $180, master $240, contractor $250 (plus $150 contractor registration), each for 3 years [9][13]
Renewal + CE
All licenses expire June 30 every 3 years (current period ends June 30, 2029) Journeyperson and master need 8 hours of CE per term [2][13][14]
Refrigerant handling
EPA Section 608 certification required to service equipment that could release ozone-depleting refrigerants [22]
Reciprocity
No HVAC reciprocity agreements The board's only agreement covers South Dakota plumbing licenses [11][12]
On this page
  1. At a glance
  2. Starting from zero
  3. The license pathway
  4. Who needs an HVAC license in Iowa
  5. Which HVAC license: HVAC-refrigeration, hydronic, mechanical, sheet metal
  6. The license ladder: apprentice to contractor
  7. The exams
  8. Fees, renewal and continuing education
  9. Union and open-shop apprenticeships in Iowa
  10. If you're licensed in another state
  11. Steps to get licensed
  12. Where to get the hours
  13. Licensed in another state?
  14. Questions people ask

The license pathway in Iowa

  1. 1

    Apprentice

    • Through your registered apprenticeship program
    • $50 for 3 years (prorated)
    • Every 3 years; $50

    You need this license to work as an HVAC apprentice. You must be 18, have a high school diploma or GED, be enrolled in a DOL-registered apprenticeship, and work under a licensed journeyperson or master. One apprentice license covers all plumbing and mechanical trades. [1][2][3][9]

  2. 2

    Journeyperson HVAC-refrigeration or mechanical

    • 4 years of experience
    • Through your registered apprenticeship program
    • Yes: Kirkwood Community College, open book, 75 questions, 2 hours, 75% to pass (HVAC-refrigeration, mechanical, hydronic or sheet metal)
    • $35 exam application + Kirkwood exam fee; $180 license for 3 years
    • Every 3 years; $180; 8 hours CE

    Lets you install and repair HVAC systems under the supervision of a master in your discipline. You need four years of practical experience in a DOL-registered apprenticeship and the exam. Passing both the HVAC-refrigeration and hydronic exams qualifies you for the mechanical license without the mechanical exam. [1][2][7][9][10][14]

  3. 3

    Master HVAC-refrigeration or mechanical

    • 2 years of experience
    • Yes: Kirkwood Community College, open book, 100 questions, 4 hours, 75% to pass
    • $35 exam application + Kirkwood exam fee; $240 license for 3 years
    • Every 3 years; $240; 8 hours CE

    Lets you plan and supervise HVAC work and serve as master of record for a contractor. You qualify after two years as a licensed journeyperson in the same discipline (or with a master license from another jurisdiction) and the master exam. There is no master sheet metal license. [1][2][9][10][12][14]

  4. 4

    Mechanical contractor

    • $250 license + $150 contractor registration for 3 years (prorated)
    • Every 3 years

    A business license. You must hold a master license or employ a master for each discipline you work in, keep a permanent place of business, carry at least $500,000 of public liability insurance and a $5,000 surety bond, and register as a contractor (one joint application). [1][7][8][13]

Who needs an HVAC license in Iowa

Iowa law says a person may not install or repair mechanical, HVAC, refrigeration, sheet metal or hydronic systems, or operate as a contractor, without a license from the Plumbing and Mechanical Systems Board. A business doing this work must employ a licensed master who is actively in charge of it.

The state license replaced city and county mechanical licenses: state law voids local licensing and bars cities from stopping a state licensee from doing licensed work. Cities can still charge permit and inspection fees, and some still have contractors file paperwork: Davenport, for example, asks HVAC contractors for a copy of their state license and a $5,000 bond. Check with the city where you work.

Exceptions include helpers doing manual labor for a licensee, a homeowner working on an existing single-family home that is their principal residence and qualifies for the homestead tax credit, and some employees of utilities, manufacturers and government units. Journeyperson and master HVAC-refrigeration or mechanical licensees don't need Iowa's special electrician license to disconnect and reconnect existing air conditioning and refrigeration systems. [1][5][6]

Which HVAC license: HVAC-refrigeration, hydronic, mechanical, sheet metal

The board also issues specialty licenses: a service technician HVAC license for work from an appliance's shutoff valve to the appliance (you need NATE certification or a service technician associate degree), and a hearth systems license for gas fireplaces and stoves (National Fireplace Institute certification). You can't hold an active apprentice license and an active specialty license at the same time. [1][2][7]

The license ladder: apprentice to contractor

See journeyman vs. master for what the levels mean in general. [1][2][7][8]

The exams

Kirkwood Community College gives the board's exams. First send the board's exam application ($35 per exam); approval can take up to two weeks and lasts one year, and you may test as many times as you need in that year, paying Kirkwood each time.

[2][4][9][10][11][12]

Fees, renewal and continuing education

Three-year license fees: apprentice $50, journeyperson $180, master $240, contractor $250 plus $150 for contractor registration. Exam applications are $35 each, and paper applications cost $25 extra. Buying two or more journeyperson, master or contractor licenses together cuts those license fees by 30%; combining an HVAC-refrigeration or hydronic license into a mechanical license costs $50.

Every license expires on June 30 at the end of the same three-year period. DIAL says the current period runs July 1, 2026 to June 30, 2029, and new licenses are prorated. Renewing in July is free of late fees; in August the late fee is $60, and from September it is $100 and you may not work until you renew.

Continuing education (CE, approved classes you take while licensed): journeyperson and master licensees need at least 8 hours per three-year term, including 2 hours of safety, 2 hours of the Iowa mechanical code and 4 hours in your discipline (8 hours of discipline classes if you hold several licenses). Up to half may be online. [2][9][13][14]

Union and open-shop apprenticeships in Iowa

Because the apprentice license requires a DOL-registered program, you need a sponsor:

More: how to get an apprenticeship and EPA 608 certification. [15][16][17][18][19]

If you're licensed in another state

Iowa has no HVAC reciprocity agreements; the board's only agreement is with South Dakota for plumbing. Your options:

[4][11][12][20][21]

Steps to get licensed in Iowa

  1. Finish high school or a GED and turn 18

    Both are required for an Iowa mechanical apprentice license. [2]

  2. Join a registered apprenticeship and get your apprentice license

    Get hired into a DOL-registered HVAC or mechanical apprenticeship, then apply on DIAL's license portal. The license is $50 for 3 years. [3][5][9]

  3. Get EPA 608 certified

    You need Section 608 certification before you service equipment that could release ozone-depleting refrigerants. [22]

  4. Work four years under licensed journeypersons and masters

    The board's rule lets you apply for the journeyperson exam up to 12 months before you finish the 48 months of apprentice credit, but DIAL's exam page says 6 months, so confirm with the board. [1][2][4][7]

  5. Pass the journeyperson exam and apply for the license

    Send the board's exam application ($35), then register with Kirkwood Community College at (319) 398-1022. After you pass (75%) and finish your apprenticeship, submit the post-examination licensure application within two years. [2][4][9][10][23]

Where to get the hours

Programs that train HVAC technicians in or for Iowa, from their own official pages. Listed by type, not ranked.

Licensed in another state?

  • Any level (licensure by verification)

    Iowa's universal recognition law (Iowa Code 272C.12) lets new Iowa residents (or spouses of active-duty service members on permanent change of station orders to Iowa) apply on the strength of an out-of-state license held in good standing. The board's rule also requires proof that you passed the Iowa licensing exam; the law lets you get a temporary license, good for three months and renewable once, while you take it. [20][21]

Also listed by: Delaware (their own boards list Iowa as a partner; check both sides before you move).

Open the reciprocity map · How reciprocity works

AlaskaAK MaineME VermontVT New HampshireNH WashingtonWA IdahoID MontanaMT North DakotaND MinnesotaMN IllinoisIL WisconsinWI MichiganMI New YorkNY Rhode IslandRI MassachusettsMA OregonOR NevadaNV WyomingWY South DakotaSD IowaIA IndianaIN OhioOH PennsylvaniaPA New JerseyNJ ConnecticutCT CaliforniaCA UtahUT ColoradoCO NebraskaNE MissouriMO KentuckyKY West VirginiaWV VirginiaVA MarylandMD DelawareDE ArizonaAZ New MexicoNM KansasKS ArkansasAR TennesseeTN North CarolinaNC South CarolinaSC District of ColumbiaDC OklahomaOK LouisianaLA MississippiMS AlabamaAL GeorgiaGA HawaiiHI TexasTX FloridaFL
IA Listed here (agreement or endorsement) Lists IA

Questions people ask

Do you need a license to do HVAC work in Iowa?

Yes. Iowa licenses HVAC-refrigeration, hydronic, sheet metal and mechanical work statewide, from apprentice to master and contractor. Helpers doing manual labor for a licensee are the main exception. [1]

Do you need a high school diploma to be an HVAC apprentice in Iowa?

Yes. Iowa's rule says all apprentice license applicants must have completed high school or a GED, and must be at least 18. [2]

How long does it take to become a journeyman HVAC technician in Iowa?

Four years of practical experience in a DOL-registered apprenticeship plus the journeyperson exam. The board's rule lets you apply for the exam up to 12 months before you finish (DIAL's exam page says 6 months; confirm with the board). [1][2][4]

What is the difference between an HVAC-refrigeration and a mechanical license in Iowa?

HVAC-refrigeration covers heating, cooling, ventilation and refrigeration. Mechanical also covers sheet metal and hydronic work. Passing both the HVAC-refrigeration and hydronic exams qualifies you for the mechanical license. [1]

Sources (30)
  1. Iowa Code 2026, Chapter 105, Plumbers, Mechanical Professionals, and Contractors, Iowa Legislature. Accessed October 11, 2026.
  2. Iowa Admin. Code 481, Chapter 429: Plumbing and Mechanical Systems Board, Application, Licensure, and Examination, Iowa Legislature (Iowa Administrative Code). Accessed October 11, 2026.
  3. Apprentice License, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  4. Examination, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  5. Plumbing & Mechanical Systems Licensure, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  6. Contractor Licenses, City of Davenport, Iowa. Accessed October 11, 2026.
  7. Iowa Admin. Code 481, Chapter 431: Plumbing and Mechanical Systems Board, Licensee Practice, Iowa Legislature (Iowa Administrative Code). Accessed October 11, 2026.
  8. Contractor License (Plumbing & Mechanical Systems), Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  9. Iowa Admin. Code 481, Chapter 428: Plumbing and Mechanical Systems Board, Licensure Fees, Iowa Legislature (Iowa Administrative Code). Accessed October 11, 2026.
  10. State Disciplines (Iowa plumbing and mechanical examinations), Kirkwood Community College (the board's exam provider). Accessed October 11, 2026.
  11. Journey Level License, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  12. Master Level License, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  13. Plumbing & Mechanical Systems License Period & Fees, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  14. Iowa Admin. Code 481, Chapter 432: Continuing Education for Plumbing and Mechanical Systems Professionals, Iowa Legislature (Iowa Administrative Code). Accessed October 11, 2026.
  15. Find a Local Union, United Association (UA). Accessed October 11, 2026.
  16. Iowa Pipe Trades and HVAC Training Institute, Iowa Pipe Trades and HVAC Training Institute (UA Local 33). Accessed October 11, 2026.
  17. Application Brochure (2023), Local 125 Plumbers and Pipefitters Training Center. Accessed October 11, 2026.
  18. Intro to Iowa Apprenticeships, ABC of Iowa Trust (Associated Builders and Contractors of Iowa). Accessed October 11, 2026.
  19. The Iowa Office of Apprenticeship, Iowa Workforce Development. Accessed October 11, 2026.
  20. Iowa Admin. Code 481, Chapter 430: Plumbing and Mechanical Systems Board, Alternative Licensure Pathways, Iowa Legislature (Iowa Administrative Code). Accessed October 11, 2026.
  21. Iowa Code 2026, Section 272C.12, Licensure of persons licensed in other jurisdictions, Iowa Legislature. Accessed October 11, 2026.
  22. Section 608 Technician Certification, U.S. Environmental Protection Agency. Accessed October 11, 2026.
  23. Post-Examination Licensure, Iowa Department of Inspections, Appeals, and Licensing. Accessed October 11, 2026.
  24. Frequently Asked Questions: Registered Apprenticeship Programs, Iowa Workforce Development. Accessed October 11, 2026.
  25. Apprenticeship Application, UA Local 125 (Plumbers, Pipefitters and Refrigeration Fitters, Cedar Rapids). Accessed October 11, 2026.
  26. NCRC Testing, Local 125 Plumbers and Pipefitters Training Center. Accessed October 11, 2026.
  27. Apprenticeship Application, Local 125 Plumbers and Pipefitters Training Center. Accessed October 11, 2026.
  28. Employer Apprenticeship Registration: 2026-2027 Registration Dates, ABC of Iowa Trust (Associated Builders and Contractors of Iowa). Accessed October 11, 2026.
  29. Career & Technical Education, Iowa Department of Education. Accessed October 11, 2026.
  30. Senior Year Plus, Iowa Department of Education. Accessed October 11, 2026.