HVAC System Replacement Cost in Houston, Texas
Full HVAC system replacement in Houston runs about $15,500 for a typical job. Basic installs start near $9,400. High-efficiency equipment with duct or electrical work can reach $20,400.
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Houston Weather and HVAC Load
In a normal year, Houston racks up 1,222 heating and 3,279 cooling degree days (NOAA 1991-2020 normals). Cooling carries most of the load, which is why compressors and condenser fan motors wear out faster here than in northern cities. Count on roughly 5 nights below 32°F and 109 afternoons past 90°F in a typical year.
| Heating degree days / year | 1,222 |
|---|---|
| Cooling degree days / year | 3,279 |
| Nights at or below 32°F | 5 |
| Days above 90°F | 109 |
| Average low / high | 61.5°F / 79.6°F |
Houston Housing Stock
Half the homes in Houston were built before 1981 (Census ACS median), so the typical house is about 45 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. About 385,000 households here own their home, 42% of the occupied total. The median home value is $253,400, and median household income is $62,894. We use both figures to adjust labor and pricing for this page.
Between 2020 and 2025, NOAA's Storm Events Database logged 28 hail days and 44 days with damaging thunderstorm winds in Harris County. The largest hail reported was 2 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage. Harris County also had 9 tornado days in that period.
When Replacement Makes Sense
- Both units keep needing repairs
- Both the heating and cooling equipment are 15 years old or more
- An old R-22 AC paired with an aging furnace
What Moves the Price
- Equipment sized to the house and climate
- Permits and electrical work
- Duct repair or replacement
- Thermostat and zoning upgrades
- Furnace plus AC, or heat pump plus air handler
- Efficiency ratings: SEER2, AFUE and HSPF2
For Houston we raised the national figures about 10%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Removing the old equipment
- Startup, testing and warranty registration
- New, matched heating and cooling equipment
- Duct connections and sealing
- A load calculation and system design
Texas Permits, Efficiency Rules and Rebates
Texas is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Plan on a mechanical permit for most replacements in Houston; the contractor normally pulls it. Before you sign, ask each bidder for their Texas license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
- Make every bidder quote the same efficiency ratings, or the prices won't compare.
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
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HVAC System Replacement Questions from Houston Homeowners
How much is full HVAC system replacement in Houston?
Plan on $9,400 to $20,400, with most jobs near $15,500. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Houston?
Between late fall and early spring. With 109 days over 90°F, Houston contractors are booked solid all summer, and off-season jobs are easier to schedule and negotiate.
Can I replace only the AC and keep my furnace?
Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.
How often should an HVAC system be replaced?
Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.
HVAC System Replacement Near Houston
- San Antonio $9,000 to $19,600
- Dallas $9,600 to $20,900
- Fort Worth $9,700 to $21,100
- Austin $11,600 to $25,300
- El Paso $8,400 to $18,200
- Arlington $9,500 to $20,600
- Corpus Christi $9,300 to $20,200
- Plano $11,200 to $24,300
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Houston-Port; NOAA Storm Events Database 2020-2025, Harris County. Prices are our estimates, not contractor quotes. Updated 2026.