Idaho HVAC License Requirements (2026)

The Idaho HVAC Board, within the Division of Occupational and Professional Licenses (DOPL), regulates heating, ventilation, air conditioning, and refrigeration work under Idaho Code Title 54 Chapter 50. Idaho issues individual credentials at three levels — Registered Apprentice, Journeyman HVAC, and HVAC Contractor — along with limited specialty endorsements. All mechanical installations in Idaho are governed by the International Mechanical Code (IMC) and International Fuel Gas Code as adopted by the Board. Any work involving refrigerants also requires federal EPA Section 608 certification.

Regulatory Body Profile

Idaho Division of Occupational and Professional Licenses (DOPL) is the statutory authority responsible for issuing and enforcing this license under Idaho Code Title 54 (Chapters 10 Electrical, 26 Plumbing, 45 Public Works Contractors, 50 HVAC, 52 Idaho Contractor Registration). DOPL houses the Idaho Contractors Board, Electrical Board, Plumbing Board, and HVAC Board. It issues public works contractor licenses, contractor registrations, and individual trade licenses statewide, administers examinations, and handles discipline.

Official portal: https://dopl.idaho.gov/
Address: 11341 W. Chinden Blvd., Bldg. 4, Boise, ID 83714
Phone: (208) 334-3233

The Eligibility Audit

The threshold requirements are straightforward: age 18 or above, plus a valid Social Security Number. No Idaho residency requirement.

Good moral character

DOPL reviews criminal and disciplinary history. Felonies are reviewed individually.

Background investigation

Criminal history disclosure required on the application.

Experience and Education Standards

The experience bar is four years and 8,000 hours of HVAC construction and service work performed as a Registered Apprentice under the direct supervision of an Idaho-licensed Journeyman or HVAC Contractor, plus completion of an approved 576-hour related classroom training program, and it must be backed by verifiable records — typically payroll, tax, project, or supervisor documentation covering the claimed period.

Accepted proof of experience or eligibility

Idaho HVAC Board apprentice hours affidavit signed by the supervising journeyman or contractor
Approved apprenticeship school transcripts (576 classroom hours)
EPA Section 608 certification card
W-2 or payroll records covering the qualifying period

Education substitution

Completion of an Idaho HVAC Board approved HVAC trade school program may substitute for a portion of the on-the-job hours at the Board's discretion.

The Exam Syllabus

Testing is handled by Idaho HVAC Board (examinations administered by DOPL). The applicant has to pass each part listed here before the credential is granted:

Idaho Journeyman HVAC Examination — International Mechanical Code, International Fuel Gas Code, Idaho HVAC law and rules — 100 questions, 240 minutes, passing score 75%
Idaho HVAC Contractor Examination — IMC, IFGC, business, and Idaho law — 100 questions, 240 minutes, passing score 75%

Examination fee: $60 examination fee per attempt paid to DOPL.

Retake policy: Failed examinations may be retaken by paying a new $60 fee. Candidates who fail three consecutive attempts must complete additional Board-approved training before retesting.

Bonding, Insurance & Financial Security

There is no statewide surety bond tied to this credential in the cited record. Bonding can still surface at the project level — permit, license, or public-works bonds — so check before you bid.

General liability

Individual journeyman licenses carry no insurance requirement. HVAC Contractor licenses must maintain general liability insurance per Board rules.

Workers' compensation

Workers' compensation is mandatory under Idaho Code Title 72 for any HVAC business with employees.

Additional financial requirements

Not required for individual journeyman credentials.

Schedule of Fees

Fee	Amount
Application (non-refundable)	$60
Examination	$60
Initial license	$60
Renewal (every year)	$40

Renewal and Continuing Obligations

The Idaho Journeyman HVAC and HVAC Contractor License runs on a year renewal cycle. The current renewal fee is $40. Journeyman and HVAC Contractor licenses renew annually on the licensee's birthday.

Continuing education: Sixteen hours of Idaho HVAC Board approved continuing education, including IMC updates, each renewal cycle.

Downloadable Asset

2026 Idaho HVAC License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Out-of-State Reciprocity

For this classification, Idaho does not recognize the NASCLA Accredited Examination.

Reciprocal State	Accepted Exam	Conditions
Montana	Journeyman trade exam waived	Active Montana journeyman HVAC/mechanical in good standing.
Utah	Journeyman trade exam waived	Active Utah journeyman HVAC in good standing.

Idaho HVAC Board maintains limited bilateral reciprocity with neighboring states for journey-level credentials.

Weighing more than one jurisdiction? The national hub compares HVAC license requirements in every state — exam, bond, fee, and experience thresholds side by side.

The Application Roadmap

Register as an Idaho Apprentice HVAC. File the DOPL apprentice registration before starting work. Renew annually.
Obtain EPA Section 608 certification. Federal refrigerant handling certification is required before working with refrigerants.
Complete 8,000 hours and 576 classroom hours. Four years of supervised work plus approved related classroom training.
Submit the Idaho Journeyman HVAC application. Include the hours affidavit, EPA 608 card, and classroom transcripts with the $60 exam fee.
Pass the Journeyman examination at 75%. IMC, IFGC, and Idaho law and rules.
Pass the HVAC Contractor examination at 75% (if going into business). Adds business and law content to the trade portion.
Obtain the HVAC Contractor license and Idaho Contractor Registration if required. File the DOPL contractor application with insurance proof.

Where Applications Stall

The following pitfalls summarize the issues most likely to delay, return, or derail a Idaho HVAC application based on the published board instructions and source materials cited on this page.

Working unregistered

Performing HVAC work in Idaho without at least a Registered Apprentice credential is a disciplinary violation.

Skipping EPA 608

EPA Section 608 is federal and required before touching any refrigerant. DOPL will reject incomplete applications.

Missing classroom hours

576 related classroom hours are mandatory and cannot be waived by additional on-the-job time.

Operating without the HVAC Contractor credential

A journeyman may not contract directly with owners. Only an HVAC Contractor may.

Missing continuing education

16 hours of Board-approved CE per year is mandatory.

Pre-Application Checklist

Before submitting to DOPL, the applicant should have each of the following ready:

☐ Idaho Apprentice HVAC registration before starting work
☐ 8,000 hours of supervised HVAC experience
☐ 576 hours of approved related classroom training
☐ EPA Section 608 certification
☐ Idaho Journeyman HVAC application with $60 fee
☐ Passing score (75%) on the Journeyman examination
☐ Passing score (75%) on the HVAC Contractor examination (if going into business)

Recommended Study Materials

The list below collects the board's cited references and the materials applicants typically study from. CLR is not paid to recommend any of them.

International Mechanical Code (current Idaho-adopted edition) — International Code Council. Primary reference. Open-book on the exam.
International Fuel Gas Code (current Idaho-adopted edition) — International Code Council. Required for gas-fired equipment.
Idaho Code Title 54 Chapter 50 and IDAPA 24.39.40 — State of Idaho. Idaho HVAC law and rules.

Other Idaho Trade Licenses

For a different Idaho credential, see these companion guides published by CLR:

Common Questions

Can I do HVAC work in Idaho without a license?

No. All HVAC work requires at least a Registered Apprentice credential and supervision by a licensed journeyman or contractor.

Which mechanical code does Idaho use?

The International Mechanical Code and International Fuel Gas Code as adopted by the Idaho HVAC Board.

Is EPA Section 608 required?

Yes. Federal Section 608 certification is required for any work involving refrigerants regardless of state license status.

How many hours of experience does Idaho require?

Four years and 8,000 hours of supervised experience plus 576 classroom hours.

How often do Idaho HVAC licenses renew?

Every year. Continuing education is required.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-04-29 · Next scheduled review 2026-07-28