Texas HVAC Contractor Licensing

Texas regulates heating, ventilation, air conditioning, and refrigeration (HVACR) work through a structured licensing system administered at the state level, with additional permit requirements enforced by local jurisdictions. This page covers the licensing categories, examination and registration requirements, permit and inspection processes, and the boundaries between regulated and unregulated HVAC activity in Texas. Understanding these requirements is essential for contractors, property owners, and construction project teams operating across the state's commercial and residential sectors.

Definition and scope

HVAC contractor licensing in Texas falls under the authority of the Texas Department of Licensing and Regulation (TDLR), which administers the Air Conditioning and Refrigeration Contractor (ACRC) licensing program (TDLR HVAC Program). The program governs individuals and businesses that install, maintain, repair, or replace heating and cooling equipment connected to a structure.

Texas law — specifically Texas Occupations Code, Chapter 1302 — establishes the legal framework for HVACR contractor licensing. The statute defines covered work as the connection, installation, service, or repair of systems that condition air by controlling temperature, humidity, or air quality, as well as refrigeration systems used in commercial applications.

Scope and limitations: This page addresses Texas state-level HVAC contractor licensing requirements under TDLR and Chapter 1302. It does not cover federal refrigerant handling certifications under EPA Section 608 of the Clean Air Act (a separate federal requirement administered by the U.S. Environmental Protection Agency), nor does it address municipal or county-level trade permit requirements beyond general context. Licensing rules in other states are entirely out of scope. Plumbing and electrical work that may intersect with HVAC installations are governed by separate licensing frameworks — see Texas Plumbing Contractor Licensing and Texas Electrical Contractor Licensing for those requirements.

How it works

The Texas HVACR licensing system operates through a tiered structure with distinct license classes, each tied to scope of work, examination requirements, and insurance thresholds.

License classes under TDLR ACRC program:

1. Class A — Air Conditioning and Refrigeration Contractor: Authorizes the full scope of HVACR work, including all system types and equipment capacities. Requires passing the Class A examination administered through a TDLR-approved testing provider.
2. Class B — Air Conditioning and Refrigeration Contractor: Authorizes work limited to residential and light commercial systems, typically equipment with a capacity of 25 tons or less for cooling and 1,500,000 BTUs or less for heating. The Class B examination covers a narrower technical scope than Class A.
3. Technician Registration: Required for individuals performing HVACR work in the field under the supervision of a licensed contractor. Technician registration does not authorize independent contracting.

Key distinctions — Class A vs. Class B: Class A licensees may work on large commercial chillers, industrial refrigeration, and high-capacity rooftop units common in Texas commercial construction. Class B licensees are restricted from that work. For projects governed by Texas commercial construction regulations, Class A licensure is typically the applicable credential.

Application and examination steps:

1. Submit a TDLR application with documentation of experience, typically 4 years for Class A and 2 years for Class B (TDLR ACRC program requirements).
2. Pass the applicable written examination through a TDLR-approved testing center.
3. Submit proof of general liability insurance meeting TDLR minimums — $300,000 per occurrence for contractors (TDLR ACRC Insurance Requirements).
4. Pay applicable licensing fees (fee schedules are published on the TDLR website and subject to legislative adjustment).
5. Receive a TDLR-issued license number, which must appear on all bids, contracts, and permit applications.

Licenses renew on a two-year cycle. Continuing education hours are required for renewal — 8 hours per renewal period for contractors, per TDLR rules.

Permits and inspections: HVAC work in Texas requires permits pulled under the applicable Texas construction permits overview framework. Local building departments — not TDLR — issue HVAC mechanical permits. After installation, a local mechanical inspector verifies compliance with the International Mechanical Code (IMC) as adopted by Texas municipalities and with ASHRAE Standard 62.1-2022 for ventilation in commercial buildings.

Common scenarios

New commercial construction: A Class A contractor submits permit drawings showing duct layouts, equipment schedules, and load calculations to the local permit office. Inspections occur at rough-in (before concealment) and final stages.

Replacement of rooftop units on existing commercial buildings: Even a like-for-like equipment swap triggers a permit in most Texas jurisdictions. The contractor must hold a valid TDLR Class A or Class B license appropriate to equipment capacity.

Residential new construction: Builders coordinating HVAC installation as part of a home project must use a TDLR-registered contractor. This intersects with broader Texas construction licensing requirements applicable to homebuilders.

Refrigeration-only work: Commercial refrigeration systems (walk-in coolers, process refrigeration) fall under the Class A ACRC scope. EPA Section 608 certification for refrigerant handling is an additional, federally required credential independent of the TDLR license.

Decision boundaries

The critical classification question is whether a task constitutes regulated "installation, maintenance, or repair" under Chapter 1302 or falls under an exemption. Texas Occupations Code Section 1302.002 identifies exemptions including work performed by a property owner on their own single-family residence and certain factory-assembled equipment installations performed by the equipment manufacturer's employees.

For specialty trade contractor regulations, HVAC sits alongside electrical and plumbing as a license-required trade. General contractors coordinating HVAC subcontractors must verify that each subcontractor holds a current TDLR license — a compliance point relevant to bonding and insurance documentation under Texas construction bonding requirements.

Enforcement: TDLR has authority to issue administrative penalties, suspend, or revoke licenses for unlicensed practice. Civil penalties for violations of Chapter 1302 can reach $1,000 per day per violation (Texas Occupations Code §1302.501).

References

• Texas Department of Licensing and Regulation — Air Conditioning and Refrigeration Contractor Program
• Texas Occupations Code, Chapter 1302 — Air Conditioning and Refrigeration Contractors
• U.S. EPA Section 608 Technician Certification (Refrigerant Handling)
• International Mechanical Code — International Code Council
• ASHRAE Standard 62.1-2022 — Ventilation and Acceptable Indoor Air Quality