Missouri to District of Columbia: master HVAC technician license reciprocity
Missouri does not issue a statewide master HVAC technician license, so there is nothing to transfer. Here is District of Columbia's standard path for out-of-state applicants.
Your origin state does not issue a statewide license at this level, so there is no license to transfer. The destination's standard out-of-state path is shown; expect to meet it in full.
Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.
Out-of-state master or HVAC contractor-level licensee (any state)
Your out-of-state credentials give no advantage. You meet the destination's requirements from scratch.
The Board of Industrial Trades publishes no reciprocity for refrigeration and air conditioning mechanics, so a master-level HVAC licensee from any state applies through the DLCP online portal as a new applicant: passport-style photo, government ID, the $65 application fee, tax records and an employment verification letter signed by a master mechanic documenting 5 consecutive years of experience on systems larger than 25 compressor horsepower (or smaller systems for the limited license), and a CFC Universal certification, followed by the open-book master exam scheduled with PSI and the $110 license fee. D.C. Code § 47-2853.12(b) directs boards to waive the exam for an applicant licensed in good standing in a state whose standards were at least as high as the District's and which admits DC licensees in a like manner, and § 47-2853.08(2) lets the Board find another state's standards substantially equivalent and license by reciprocity or endorsement; an applicant may ask the Board to apply those provisions, but the Board's pages describe no such process for this trade. The national-certification substitute in § 47-2853.202(d) is written for the journeyman designation only. No District-law exam is published for master mechanics. A master who will serve as the designated master for a contractor company must post a $5,000 bond.
PSI's District of Columbia candidate bulletin lists the master refrigeration exam fee as $52 per attempt. Whether experience verified by an out-of-state master mechanic satisfies § 47-2853.202(b), and which states the Board has listed as equivalent under § 47-2853.12(d), are not stated in the Board's published materials.
At a glance
- Trade exam
- Required
- Law / code exam
- Not required
- Out-of-state hours
- Count toward eligibility
What you must already have
- You must document at least 5 years of qualifying work experience.Five consecutive years immediately preceding the application installing, maintaining, repairing and replacing refrigeration and air conditioning systems larger than 25 compressor horsepower (or under 25 hp for the master limited license), verified in writing by a master mechanic (D.C. Code § 47-2853.202(b)-(c)).
What you'll do to get licensed in District of Columbia
- 1Application fee. Pay the application fee ($65). Application fee (non-refundable), paid online with the DLCP application.
- 2Trade exam. Pass the destination's trade exam. DC Master Refrigeration and Air Conditioning Mechanic examination (regular or limited) administered by PSI, open book on the 2012 International Mechanical Code and Modern Refrigeration and Air Conditioning; schedule at psiexams.com after Board pre-approval.
- 3Exam fee. Pay the exam fee ($52). Per attempt, paid to PSI when scheduling, as listed in PSI's District of Columbia candidate bulletin.
- 4License fee. Pay the license or certificate fee ($110). Mechanic license fee for a term ending September 30 of the next even-numbered year (renewal $155).
- 5Other. Tax records and an employment verification letter signed by a master mechanic detailing 5 consecutive years of experience, uploaded with the online application.
- 6Surety bond. Post a surety bond ($5,000) (if applicable). Refrigeration and Air Conditioning bond of $5,000 required only if the master is designated to a Refrigeration and Air Conditioning Contractor company (the company posts a separate $5,000 bond).
- 7Other. EPA Section 608 technician certification (Type I/II/III/Universal) to handle refrigerants; federal, does not expire. DLCP requires a 'CFC Universal Certification' card with the master application and D.C. Code § 47-2853.202(c) requires proof of chlorofluorocarbon certification for the master mechanic limited license.
Published fees on this path total $227, excluding exam-vendor fees, bonds, and insurance.
What you'll need to buy or arrange
Exam preparation
Most boards contract PSI, Prov, or ICC for exams. Check which code edition the exam is written to before buying a prep course.
- Trade exam
- Exam fee · $52
- Other
Surety bond
A license or contractor bond is bought from a surety, not the state. Price is a small percentage of the bond amount and depends on your credit.
- Surety bond · $5,000 · if applicable
How District of Columbia licenses master HVAC technicians
District of Columbia master HVAC technician · “Master Refrigeration and Air Conditioning Mechanic”
Statewide license
Issued by DC Board of Industrial Trades (Department of Licensing and Consumer Protection)
The District's highest person-held HVAC credential is the Master Refrigeration and Air Conditioning Mechanic license issued by the Board of Industrial Trades (DLCP); a Master Mechanic Limited license covers systems of 25 compressor horsepower and below. A Refrigeration and Air Conditioning Contractor license is a separate business credential that must name a designated DC-licensed master mechanic, and a master designated to a contractor must post a $5,000 bond (the company posts another $5,000). Under D.C. Code § 47-2853.202(b) a master applicant must show 5 consecutive years immediately before applying installing, maintaining, repairing and replacing refrigeration and air conditioning systems larger than 25 compressor horsepower, verified in writing by a master mechanic (the limited license requires 5 years on smaller systems plus chlorofluorocarbon certification); DLCP also requires tax records and a CFC Universal certification, and the applicant passes the PSI-administered open-book master exam. Fees are a $65 application fee and a $110 mechanic license fee; licenses expire September 30 of even-numbered years and renew for $155. The Board publishes no reciprocity for refrigeration and air conditioning mechanics.
Compare: getting a District of Columbia license from scratch
Why Missouri has nothing to transfer
Missouri master HVAC technician
Licensed by cities and counties
Missouri does not issue a master HVAC license or a statewide mechanical contractor license; the Division of Professional Registration licenses no HVAC or mechanical profession, and unlike the electrical trade there is no voluntary statewide contractor license for HVAC. The master-level credential exists only at the local level under names that vary by jurisdiction: Springfield certifies Master Mechanical craftsmen (4 years as a certified journeyman or 10 years of experience, ICC exam, $50), Kansas City issues a mechanical certificate of qualification to the supervisor who qualifies a licensed mechanical contractor (Prometric or ICC exam, $60 application, $181 four-year renewal), and St. Louis County and the City of St. Louis license mechanical contractors through their boards of examiners. An out-of-state master HVAC license carries no state-level recognition in Missouri, and none of these jurisdictions publish a reciprocity path for it; Springfield accepts an identical ICC, Prometric, Experior or Block exam score in place of retesting and Kansas City may accept a comparable exam it deems equivalent. A master arriving from another state should expect to qualify in each jurisdiction separately and then obtain that jurisdiction's mechanical contractor license to pull permits. EPA Section 608 certification is a separate federal requirement.
How local licensing works in Missouri
How local licensing works. Missouri has no state HVAC license and no statute standardizing local HVAC licensing; each city or county sets its own master, supervisor and contractor requirements.
Springfield. Building Development Services certifies Master Mechanical craftsmen: 4 years as a certified journeyman in the trade or 10 years of satisfactory experience, documented on notarized employer forms and approved by the Building and Trades board; ICC master mechanical exam through Pearson Vue (about $125), 75% to pass; certification card $50 with $50 annual renewal. 'Reciprocation' applicants submit copies of their other-state licenses and an identical-exam score of 75% or better from Prometric, Experior, Block or ICC; otherwise they test.
Kansas City. City Planning and Development licenses mechanical contractors ($55 application, $181 issuance, $181 renewal every four years) whose scope covers heating, duct and ventilation systems, refrigeration maintenance, gas piping to burners and control wiring. Every licensed contractor must employ a full-time supervisor who holds a Kansas City certificate of qualification in the mechanical trade; the certificate requires an application with notarized references and a passing score from a recognized agency such as Prometric or ICC ($60 application, first four-year certificate free, $181 renewal), and the city may accept a comparable exam from another jurisdiction if it deems it equivalent or superior.
St. Louis County. The Board of Examiners for Mechanical Licensing certifies mechanical contractors (a certified contractor list is published) and requires a licensed mechanical contractor bond and, for some applicants, a financial responsibility bond; applications and renewals go through the Accela portal. Master-level exam and experience details are not published on the pages that could be opened.
City of St. Louis. The Mechanical Contractors Board of Examiners (Ordinance 62579, City Code 25.10) reviews each applicant's qualifications for a Mechanical Contractor's license issued by the Building Division; the license is required to pull mechanical permits for boilers, furnaces, exhaust systems and ventilation. Contractors also need the city's graduated business license.
Out-of-state holders. No reciprocity or endorsement path for another state's master HVAC license was found in any of these jurisdictions. The practical route is to present an identical ICC or Prometric master mechanical score where accepted (Springfield; Kansas City case by case), document experience, and apply for the local master certificate and contractor license in each jurisdiction where work will be performed.
Common questions
- Do I have to take the District of Columbia master HVAC technician exam if I'm licensed in Missouri?
- Yes. District of Columbia requires the trade exam on this path.
- What does it cost to get a District of Columbia master HVAC technician license from Missouri?
- Published fees on this path total $227, not counting exam vendor fees or bonds.
- Do my Missouri work hours count in District of Columbia?
- Yes. Documented out-of-state experience counts toward District of Columbia's eligibility requirements.
- Does it work the other way, from District of Columbia to Missouri?
- Not necessarily. Reciprocity is directed. Going from District of Columbia to Missouri, the mechanism is not applicable.
Sources
- D.C. Code § 47-2853.08 - Powers of the boards (reciprocity and endorsement) · D.C. Code § 47-2853.08(2) · Council of the District of Columbia · Statute · verified September 16, 2026
- D.C. Code § 47-2853.12 - License, certification, and registration criteria; waiver · D.C. Code § 47-2853.12(b)-(d), (l) · Council of the District of Columbia · Statute · verified September 23, 2026
- D.C. Code § 47-2853.201 - Scope of practice for refrigeration and air conditioning mechanics · D.C. Code § 47-2853.201 · Council of the District of Columbia · Statute · verified September 15, 2026
- D.C. Code § 47-2853.202 - Refrigeration and air conditioning mechanics: eligibility requirements · D.C. Code § 47-2853.202 · Council of the District of Columbia · Statute · verified September 23, 2026
- 17 DCMR Chapter 3 - Refrigeration and Air Conditioning Licensing (§§ 303, 304, 306, 307, 309, 310) · 17 DCMR §§ 303.6-303.8, 304, 306, 307, 309, 310, 312 · DC Office of Documents and Administrative Issuances (DCMR) · Admin Rule · verified September 23, 2026
- District of Columbia Board of Industrial Trades · District of Columbia Department of Licensing and Consumer Protection · Agency Page · verified September 17, 2026
- DC DLCP - Board of Industrial Trades landing page (apply, items needed, examination, reciprocity) · District of Columbia Department of Licensing and Consumer Protection (DLCP) · Agency Page · verified September 23, 2026
- DC DLCP - Refrigeration/Air-Conditioning License (Limited and Regular) Application Instructions - Apprentice, Journeyman, and Master · District of Columbia Department of Licensing and Consumer Protection, Occupational and Professional Licensing · Form · verified September 23, 2026
- DLCP bulletin - Refrigeration & Air Conditioning Mechanic License Renewal Notice (July 27, 2026) · District of Columbia Department of Licensing and Consumer Protection, Board of Industrial Trades · Agency Page · verified September 23, 2026
- PSI Candidate Information Bulletin - Washington D.C. Contractor/Trades Examinations · PSI Services LLC for the District of Columbia Board of Industrial Trades · Form · verified September 23, 2026
- EPA Section 608 Technician Certification Requirements · 40 CFR Part 82, Subpart F (Clean Air Act §608) · U.S. Environmental Protection Agency · Other · verified September 15, 2026
Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.