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How to Choose an HVAC Company in Texas: What a Good Installer Does That a Bad One Skips

How to choose an HVAC company in Texas: verify the TDLR license, insist on a Manual J load calc, test the attic ducts, and compare quotes by model number.

How to Choose an HVAC Company in Texas: What a Good Installer Does That a Bad One Skips

An air conditioner in Houston, Dallas, San Antonio, or Austin runs 2,500 to 3,500 hours a year, more than three times the national average, and the difference between a careful installation and a sloppy one shows up as a compressor that fails in year seven instead of year fifteen. Texas homeowners spend more on cooling than almost anyone in the country, and the contractor who installs the system determines a large share of that spending for the next decade.

The state licenses HVAC contractors through the Texas Department of Licensing and Regulation, which makes the first check easy. What is harder is telling the difference between the hundreds of licensed companies in each metro, since a TDLR license proves the qualifying person passed an exam and carries insurance, not that the crew showing up at your house will size the system correctly or charge it properly. This guide focuses on the steps that separate the good companies from the rest, and how to confirm a company follows them before you sign.

Texas is also several climates. Houston, Corpus Christi, and the coast are humid, Dallas and Fort Worth are hot and drier, Austin and San Antonio sit between, and El Paso, Lubbock, and Amarillo are dry with real winters. The right system and the right installer vary accordingly.

The License Check Takes Two Minutes

Texas requires an Air Conditioning and Refrigeration Contractor license from TDLR for anyone installing, servicing, or repairing HVAC equipment for hire. Class A licenses have no size limit, and Class B licenses cover systems up to 25 tons of cooling and 1.5 million BTU of heating, which includes every residential job. Licenses also carry endorsements for environmental air conditioning, commercial refrigeration, or both.

The TDLR license search shows the license holder, the class, the endorsements, the expiration date, and any disciplinary history. Ask every company for the license number and check it. The license must be held by the company or its qualifying person, and the license number is required by law to appear on the company's advertising, vehicles, and invoices.

Ask for a certificate of general liability insurance as well, since TDLR requires it but the amount matters for a large job. Texas does not require workers compensation for most private employers, so ask whether the company carries it. A technician injured in your attic without coverage becomes a claim against your homeowners policy.

Permits vary by city. Houston, Dallas, Austin, San Antonio, Fort Worth, and most incorporated cities require a mechanical permit and inspection for a system replacement.

Unincorporated county areas often do not. A contractor who suggests skipping a required permit is skipping the only third-party check on their work.

The Load Calculation Is Where Bad Installs Begin

Texas homes are oversized for cooling more often than homes anywhere else, because contractors for decades sized by rule of thumb at 500 or 600 square feet per ton and rounded up. An oversized air conditioner in Houston cools the air fast, shuts off before it has removed the humidity, and leaves the house at 74 degrees and clammy. It also short-cycles, which wears out the compressor.

A Manual J load calculation fixes this. It accounts for square footage, insulation, window area and orientation, ceiling height, shading, and infiltration, and it takes 30 to 60 minutes on site. In Texas it often produces a recommendation one size smaller than the old unit, especially in homes that have added insulation, radiant barrier, or new windows since the last system was installed.

Ask each contractor whether they will perform a Manual J and show you the result. A company that says it sizes by square footage or by the old unit's label is guessing, and the guess usually errs large. In the drier climates of El Paso and the Panhandle, oversizing is less damaging to comfort but still wastes money and shortens equipment life.

Manual S and Manual D

Equipment selection follows the load calculation, and a contractor who matches the outdoor unit and the indoor coil to the calculated load using the manufacturer's data is following Manual S. Duct design follows Manual D. Few residential contractors do full Manual D designs on replacements, but the good ones test the existing ducts for static pressure and leakage before choosing a blower.

Ducts, Attics, and the Texas Heat

Attic ducts are the norm across Texas, and a Texas attic reaches 130 to 150 degrees in July. Flex duct in that attic with 20% to 30% leakage, which is common in homes built before 2010, loses a large share of the cooling before it reaches the rooms. A contractor who tests duct leakage and quotes sealing or replacement alongside the equipment is doing the complete job, and one who ignores the ducts is leaving a third of the new system's capacity in the attic.

Ask about the return air path as well. Many Texas homes have a single undersized return that starves the system and raises static pressure, and adding a return costs $400 to $1,200 during a replacement. Variable-speed and two-stage equipment, which runs longer at low speed and removes more humidity, is worth the added cost in Houston, the coast, and the eastern half of the state.

Startup verification is the final step. Refrigerant charge set by measured subcooling and superheat, airflow confirmed at the air handler, and readings documented and left with you are the marks of a company that finishes the job.

Comparing Quotes in Texas

A replacement system for a 2,000-square-foot Texas home costs $8,000 to $16,000 installed in 2026, and the largest homes in the Dallas and Houston suburbs with two or three systems run well beyond that. Austin and Dallas sit slightly above the state average, Houston and San Antonio near it, and El Paso, Lubbock, and the smaller metros below. Prices are approximate, and the spread between contractors for identical equipment is 20% to 40%.

Written quotes need model numbers for the outdoor unit, the indoor unit or coil, and the thermostat. Without them, two quotes for a "4-ton 16 SEER2 system" can be $4,000 apart with no way to tell why. Texas is in the federal Southwest efficiency region for most of the state, so split air conditioners under 45,000 BTU installed here must meet at least 14.3 SEER2 and 11.7 EER2, and the better equipment runs 16 to 20 SEER2.

Check what each quote includes: a new line set or a documented flush, a pad and disconnect, a condensate line with a float switch, a permit where required, haul-away, the thermostat, and the labor warranty. Utility rebates come from CenterPoint, Oncor, AEP Texas, CPS Energy, Austin Energy, and the electric cooperatives, and the amounts change each year.

A contractor registered with your utility can apply them. You can compare TDLR-licensed HVAC contractors serving your part of Texas and check for utility program registration before requesting quotes.

Warranties and Financing

Manufacturer parts warranties run 10 years when the system is registered within the manufacturer's window, and the contractor should register it. Labor warranties are the contractor's promise and range from one to ten years, so the company's age and stability matter. Contractor financing at zero percent usually carries a dealer fee built into the price, so ask for the cash price separately.

Red Flags That Are Common in Texas

Door-to-door sales after hail storms, high-pressure "today only" pricing, and a recommendation to replace a system under 10 years old for a single failed part are the three most common complaints in the state. Capacitors, contactors, and blower motors are $200 to $700 repairs, and a company that jumps to replacement for them is working its commission.

Private equity consolidators have bought dozens of Texas HVAC companies since 2019, kept the local names, and centralized pricing. Quality varies by location, and prices at those companies often run 20% to 40% above local independents. Ask how long the company has operated under its current ownership.

Good signs include NATE-certified technicians, employees rather than subcontractors on the install crew, a maintenance plan with two visits a year at $150 to $300, and references from installations at least a year old. Spring service in March or April, before the first 95-degree day, catches most of the failures that become July emergencies. Our home services guides on the blog include an installation-day checklist so you know what a proper job looks like.

Frequently Asked Questions

What license does an HVAC company need in Texas?

A TDLR Air Conditioning and Refrigeration Contractor license, Class A or Class B, with the environmental air endorsement for residential work. The license number must appear on the company's vehicles, advertising, and invoices.

How much does an AC replacement cost in Houston or Dallas?

About $8,500 to $16,000 installed for a 3- to 5-ton system with permit and haul-away. Duct replacement adds $3,000 to $8,000 if the existing ducts fail a leakage test.

Should I choose a heat pump or a gas furnace with AC in Texas?

Heat pumps handle Houston, San Antonio, Austin, and the coast well, and a dual-fuel system suits Dallas and the areas north of it. In the Panhandle and El Paso, where winters are colder and drier, a gas furnace with a separate air conditioner remains common.

Why does my Texas contractor want to install a smaller unit than the old one?

A Manual J load calculation often shows the old unit was oversized, especially if the home has added insulation or new windows. A correctly sized system runs longer, removes more humidity, and lasts longer than an oversized one.