DC Master HVAC Steamfitter License Requirements (2026)

The District of Columbia does not issue a credential literally called "HVAC." HVAC work in DC is split between two Board of Industrial Trades categories: the Steamfitter license (Journey and Master) covers hydronic heating, piping, and mechanical systems, and the Refrigeration and Air-Conditioning Mechanic license covers refrigerant-based cooling. Both categories are administered by the DC Department of Licensing and Consumer Protection (DLCP) under D.C. Municipal Regulations Title 17, both require passing a PSI examination based on the International Mechanical Code and DC Construction Codes, and any work involving refrigerants requires federal EPA Section 608 certification.

Regulatory Body Profile

Authority over this credential rests with District of Columbia Department of Licensing and Consumer Protection — Board of Industrial Trades (DLCP), which issues and polices it under D.C. Official Code Title 47 Chapter 28 (Basic Business License); D.C. Municipal Regulations Title 17 (Business, Occupations, and Professionals). DLCP (formerly DCRA) issues the Basic Business License (BBL) including the Home Improvement Contractor endorsement, and staffs the Board of Industrial Trades which licenses master and journey electricians, plumbers, steamfitters (HVAC), and refrigeration and air-conditioning mechanics in the District of Columbia.

Official portal: https://dlcp.dc.gov/
Address: 1100 4th Street SW, Washington, DC 20024
Phone: (202) 671-4500

The Eligibility Audit

The applicant must be at least 18 years of age and possess a valid Social Security Number. No DC residency requirement.

Good moral character

Board of Industrial Trades reviews each applicant for fitness. Criminal history is evaluated case-by-case.

Background investigation

Criminal history disclosure is required on the application.

Experience and Education Standards

A minimum of seven years of documented steamfitting or refrigeration experience for the Master, at least two of which must be as a licensed Journey Steamfitter or Refrigeration and Air-Conditioning Mechanic; four years and 8,000 hours for the Journey level must be documented and verified. Unless the board publishes a different lookback period, applicants should keep payroll, tax, project, or supervisor records that support the claimed experience.

Accepted proof of experience or eligibility

Board of Industrial Trades Experience Affidavit signed by each licensed Master Steamfitter or Refrigeration and Air-Conditioning Mechanic supervisor
W-2 or 1099 records covering the qualifying period
Apprenticeship completion certificate from a USDOL-registered program (where applicable)

Education substitution

A completed USDOL-registered steamfitter or HVAC/R apprenticeship satisfies the Journey experience requirement.

The Exam Syllabus

The exam, administered by PSI Services LLC (under contract to DLCP), breaks into the parts shown below — all must be passed before licensure:

DC Master Steamfitter / Refrigeration Examination — International Mechanical Code, DC Construction Codes, business and law — 100 questions, 300 minutes, passing score 70%

Examination fee: $86 examination fee paid to PSI per attempt.

Retake policy: Failed exams may be retaken by paying a new PSI fee. The Board application remains valid for one year.

Bonding, Insurance & Financial Security

No statewide contractor license surety bond is required for this credential in the cited sources. Project-specific, permit, or public-works bonds may still apply, so confirm bonding before bidding a given job.

General liability

Individual HVAC licensees are not required to carry general liability insurance. HVAC contractor businesses must carry liability coverage as part of the Basic Business License.

Workers' compensation

Workers' compensation insurance is mandatory in DC for any employer with one or more employees under D.C. Code § 32-1501 et seq.

Additional financial requirements

No financial statement requirement for the individual credential.

Schedule of Fees

Fee	Amount
Application (non-refundable)	$230
Examination	$86
Initial license	$230
Renewal (every 2 years)	$230

Renewal and Continuing Obligations

The DC Master Steamfitter (and Refrigeration and Air-Conditioning Mechanic) runs on a 2 years renewal cycle. The current renewal fee is $230. DC HVAC licenses renew every two years.

Continuing education: Continuing education hours as set by the Board of Industrial Trades each renewal cycle.

Downloadable Asset

2026 District of Columbia 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, District of Columbia does not recognize the NASCLA Accredited Examination.

Reciprocal State	Accepted Exam	Conditions
Maryland	Trade exam may be waived	DC reviews Maryland master HVAC credentials on a case-by-case basis under Board of Industrial Trades reciprocity policy.
Virginia	Trade exam may be waived	DC reviews Virginia master HVAC credentials on a case-by-case basis.

DC does not publish formal reciprocity agreements. The Board of Industrial Trades may waive the trade examination for out-of-state master HVAC technicians with equivalent 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

Choose the correct category. Steamfitter for hydronic and piping; Refrigeration and Air-Conditioning Mechanic for refrigerant-based cooling. Many HVAC contractors hold both.
Document qualifying experience. Four years / 8,000 hours to qualify for the Journey exam, or seven years including two at Journey level for the Master.
Obtain EPA Section 608 certification. Federal refrigerant handling certification is required for any work involving refrigerants.
Submit the Board of Industrial Trades application. File the application with experience affidavits and the application fee.
Receive PSI authorization to test. DLCP issues an eligibility letter that allows scheduling with PSI.
Pass the PSI examination at 70%. Pass the 100-question exam covering the IMC, DC Construction Codes, and business and law.
Obtain a Basic Business License if self-employed. HVAC contractors operating a business must also obtain a DC Basic Business License.

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 DC-adopted edition) — International Code Council. Primary technical reference. Open-book at the PSI test center.
International Fuel Gas Code (current DC-adopted edition) — International Code Council. Required for gas-fired equipment.
D.C. Municipal Regulations Title 17 — DC Council. Board of Industrial Trades rules.

Pre-Application Checklist

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

☐ Experience affidavit signed by a DC Master Steamfitter or Refrigeration Mechanic
☐ W-2 or 1099 documentation for the qualifying period
☐ USDOL-registered apprenticeship certificate (if applicable)
☐ EPA Section 608 certification
☐ Board of Industrial Trades application with fee
☐ PSI exam pass certificate at 70% or better
☐ Basic Business License if operating as a contractor
☐ Workers compensation certificate if any employees

Where Applications Stall

These are the recurring mistakes that most often delay or reject a District of Columbia HVAC application, based on the official instructions cited here.

Picking the wrong category

Steamfitter does not authorize refrigerant work and vice versa. Confirm the scope before applying.

Skipping EPA 608

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

Skipping the Journey step

Master candidates must first hold the Journey credential for at least two years.

Confusing the individual license with a BBL

The HVAC credential authorizes the individual; a self-employed contractor still needs a Basic Business License.

Letting the license lapse

A lapsed license requires reinstatement fees and may trigger re-examination.

Other District of Columbia Trade Licenses

Looking at a different trade? CLR also publishes these District of Columbia licensing guides:

Common Questions

Does DC have a single HVAC license?

No. DC splits HVAC between the Steamfitter license (heating and piping) and the Refrigeration and Air-Conditioning Mechanic license (cooling). Contractors performing full HVAC work often hold both.

How many hours of experience does DC require?

Four years and 8,000 hours for the Journey level; seven years total including at least two years at the Journey level for the Master.

Is EPA Section 608 required?

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

Does DC reciprocate HVAC credentials?

DC has no formal reciprocity agreements but the Board may waive the trade exam for qualified out-of-state master HVAC technicians.

How often does the DC HVAC license renew?

Every two years.

Primary Sources

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

Verified 2026-04-21 · Next scheduled review 2026-07-20