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HVAC Contractors in Houston, TX

Houston is one of the most demanding HVAC markets in the United States — not just because of the heat, but because of the combination. The city's humid subtropical climate produces heat index values that regularly exceed 105°F from May through September, with overnight lows staying above 80°F during peak heat waves. AC systems in Houston run nearly year-round. They have to manage both temperature and moisture simultaneously. The result is an environment that wears out equipment faster and makes contractor selection more consequential than in almost any other US city.

This directory lists licensed HVAC contractors serving Houston and the Greater Houston metro, including The Woodlands, Katy, Sugar Land, Pearland, Cypress, Tomball, Spring, Humble, Pasadena, and Baytown. All listings use public business information. Texas HVAC license numbers are shown where provided. Unclaimed profiles are clearly labeled — no contractor has paid to appear here.

Serving Greater Houston: The Woodlands · Katy · Sugar Land · Pearland · Cypress · Tomball · Spring · Humble · Pasadena · Baytown · Missouri City · League City · Friendswood · Conroe
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· Greater Houston Metro · Last updated July 2026

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5 Things to Check Before Hiring a Houston HVAC Contractor

1. Verify the Texas TDLR HVAC license

Texas requires all HVAC contractors to hold a license from the Texas Department of Licensing and Regulation (TDLR). License classes include Class A (commercial) and Class B (residential). Individual technicians hold Technician licenses. Verify at license.tdlr.texas.gov before any work begins. Unlicensed HVAC work is illegal in Texas and voids homeowner insurance coverage.

2. Ask specifically about humidity control — not just cooling

Houston's humidity is the variable that separates a good HVAC job from a bad one. An oversized system cools fast but short-cycles, leaving the air damp and uncomfortable. Proper sizing for Houston requires a Manual J load calculation that accounts for latent heat load — the moisture content of the air — not just sensible temperature. Ask your contractor explicitly how they size for humidity.

3. Confirm the condensate drain plan

Houston's humidity means AC systems pull enormous amounts of water from the air — a properly functioning system may remove 5–10 gallons per day from the home. Condensate drains are the most common maintenance failure point in Houston. Ask about drain pan material, secondary drain lines, and whether a condensate overflow safety switch will be installed.

4. Verify mechanical permit is included for replacements

Harris County and the City of Houston require mechanical permits for HVAC replacements. The licensed contractor pulls the permit — if they suggest skipping it to save time or money, that is a red flag. Unpermitted work creates problems at time of sale and can void manufacturer warranties.

5. Schedule spring maintenance in February — not April

Houston's cooling season starts earlier than most US cities, and contractors are fully booked by late March through September. A February tune-up catches issues before the heat arrives and secures faster scheduling. A system that has sat through a mild Houston winter may have dirty coils, a low refrigerant charge, or a failing capacitor that's not obvious until the first 95°F day of May.

Frequently Asked Questions — Houston HVAC

How much does AC repair cost in Houston, TX?
AC repair in Houston typically runs $150–$500 for a standard service call. The combination of heat and humidity means compressors and capacitors in Houston wear faster than national averages. Common costs: capacitor replacement $150–$350; refrigerant recharge $200–$500; compressor $1,400–$2,800. Emergency and after-hours calls carry a 25–50% surcharge. Schedule spring maintenance in February to catch issues before peak season.
What HVAC license is required in Texas?
Texas HVAC contractors must hold a Class A or Class B license from the Texas Department of Licensing and Regulation (TDLR). Class A covers commercial work; Class B covers residential. Individual technicians hold Technician licenses. Verify at license.tdlr.texas.gov before hiring.
Why does Houston HVAC maintenance matter more than in other cities?
Houston's HVAC systems handle both temperature and humidity simultaneously — the latent heat load is among the highest of any US city. Coils, condensate drains, and drain pans foul faster than almost anywhere else in the country. Skipping annual service in Houston shortens equipment life noticeably and increases the risk of indoor air quality problems from mold and moisture in the system.
When should I replace my Houston HVAC system?
Consider replacement when the system is 12–15+ years old, repairs exceed 50% of replacement cost, or it uses R-22 refrigerant (phased out 2020). Houston's near-year-round cooling demand means high-efficiency equipment pays back quickly — a 15-SEER2+ system vs. an aging 10-SEER unit can cut cooling costs 30–40% on CenterPoint Energy rates.
Is a heat pump a good choice for Houston?
Yes. Houston's mild winters (average January lows around 45°F) make heat pumps highly efficient — backup electric heat strips rarely engage. The key requirement: choose a unit rated for Houston's extreme summer ambient temperatures and confirm the contractor has experience sizing heat pumps for high-humidity climates. Moisture management is as important as temperature management in the Houston market.

HVAC in Houston — What to Know

The Greater Houston metro is home to more than 7 million people and is the fourth-largest US city proper by population. Its climate sits firmly in the hot, humid subtropical zone — Houston's summers are longer and more humid than Dallas or San Antonio, making air conditioning essential from early April through late October most years.

Texas TDLR licensing is mandatory. All HVAC contractors in Texas — including Houston — must hold a license from the Texas Department of Licensing and Regulation. Class B licenses cover residential work; Class A covers commercial. Always verify at license.tdlr.texas.gov before signing a contract. Unlicensed HVAC work violates Texas law, cannot be permitted, and can void homeowner insurance coverage.

Humidity is the defining challenge. Houston's air conditioning systems carry one of the highest latent heat loads in the United States. Proper sizing requires a contractor who performs Manual J load calculations — not square-footage rules of thumb. An oversized system short-cycles, fails to dehumidify adequately, and causes elevated indoor humidity that can promote mold growth in Houston's climate.

Book before the heat arrives. Houston HVAC contractors are at peak demand from April through September. A February or early March tune-up catches issues before the heat wave season and secures faster scheduling. Waiting until the first hot spell typically means a 1–2 week wait for a non-emergency appointment.

Homeowner Resources

Guides to help you hire right and pay the right price.

How to Hire an HVAC Contractor

12-point checklist — licenses, permits, estimates, warranties

HVAC Licensing by State — 50-State Guide

Texas TDLR requirements and license verification

HVAC Cost Guide 2026

Service calls, repairs, and full system replacement pricing

HVAC Financing Options 2026

Manufacturer financing, HELOC, tax credits — what's available

HVAC Maintenance Schedule

What to do every season — and when to call a pro

Emergency HVAC Repair Guide

What to do when your AC or furnace fails — fast triage steps

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