Texas Air Conditioning and Refrigeration (ACR) License Lookup: Class A vs Class B Rules

Why Texas Treats Air Conditioning as Life Safety

In Texas, summer temperatures routinely climb past 100°F (38°C). When commercial air conditioning units fail in an office tower, data center, or distribution warehouse, the loss can run into tens of thousands of dollars per hour in lost productivity and damaged equipment. For complete Texas licensing standards, read our Texas TDLR Trade Licensing & Municipal Compliance Guide.

Under Texas Occupations Code Chapter 1302, air conditioning and refrigeration contractors are regulated directly by the TDLR.

Class A (TACLA) vs. Class B (TACLB) Tonnage Limits

When reviewing proposals from Texas HVAC contractors, look closely at their license prefix:

• Class A License (TACLA): Entitles the contractor to install, repair, and service cooling and heating equipment of unlimited tonnage and heating capacity. Large commercial properties require a Class A license.
• Class B License (TACLB): Limits the contractor to cooling systems of 25 tons and under, and heating systems up to 1.5 million BTUs per hour. This is typical for small retail stores and homes.

If your procurement software approves a Class B contractor for a 50-ton commercial chiller replacement, that contractor is operating in direct violation of Texas law. Compare this with Florida's CAC rules in our Florida HVAC license compliance guide.

Mandatory Insurance and Environmental Compliance

All active Texas ACR contractors must carry commercial liability insurance ($300,000 bodily injury/$600,000 aggregate for Class A; $100,000/$200,000 for Class B). In addition, technicians must hold federal EPA 608 certifications to handle regulated refrigerants.

Automated Verification via LicenseGround API

Using the Texas TDLR license verification API, software systems can verify a contractor's Class A or B designation, insurance filings, and active standing in under 2ms.

The 25-Ton Rule in Texas Commercial Facilities

Why is the 25-ton limit between Class A (TACLA) and Class B (TACLB) so important in Texas? Because commercial air conditioning load requirements scale rapidly in Texas heat.

A typical 10,000-square-foot commercial office or retail center requires at least 30 to 40 tons of cooling capacity. If you hire a Class B contractor for this installation, the contractor cannot legally pull the municipal mechanical permit. When the city building inspector visits the site, they will issue a red stop-work tag and shut down your construction schedule. Always ensure your commercial contractors hold a Class A TACLA license.

Environmental Compliance and EPA 608 Rules

Commercial air conditioning systems in Texas use advanced refrigerants regulated under federal environmental laws. In addition to state TDLR licensing, technicians must hold EPA Section 608 Universal Certifications to recover and recharge refrigerants in commercial chillers.

Contracting with unlicensed technicians who vent refrigerants can result in severe federal EPA fines exceeding $44,000 per violation. Ensuring full ACR licensing protects your facility from environmental sanctions and code violations.

Permit Pulling and City Mechanical Inspections

In Texas, holding a TDLR ACR license is the mandatory prerequisite for pulling municipal mechanical permits. In major metros like Houston, Dallas, Austin, and San Antonio, city inspectors inspect all ductwork transitions, refrigerant pressure relief valves, and emergency shutoff switches.

If work is performed without permits by an unlicensed technician, the city will issue stop-work orders and fine the property owner. Always verify state licensing and local city registration before releasing payment.