HVAC System Replacement Cost in Mission, Texas
Full HVAC system replacement in Mission runs about $15,100 for a typical job. Basic installs start near $9,200. High-efficiency equipment with duct or electrical work can reach $19,900.
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Mission Weather and HVAC Load
NOAA's 1991-2020 climate normals put Mission at 453 heating degree days and 4,989 cooling degree days per year. Cooling carries most of the load, which is why compressors and condenser fan motors wear out faster here than in northern cities. Freezing nights are rare here, but a normal year brings 177 days over 90°F.
| Heating degree days / year | 453 |
|---|---|
| Cooling degree days / year | 4,989 |
| Nights at or below 32°F | 1 |
| Days above 90°F | 177 |
| Average low / high | 67.4°F / 87.3°F |
Mission Housing Stock
Half the homes in Mission were built before 2000 (Census ACS median), so the typical house is about 26 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Owners live in 71.5% of occupied homes, roughly 20,000 households. Homes here have a median value of $160,800 and households a median income of $60,813. Those two numbers drive the labor adjustment in our estimate.
NOAA storm reports for Hidalgo County show 9 hail days and 19 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 3 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. Hidalgo County also had 3 tornado days in that period.
When Replacement Makes Sense
- An old R-22 AC paired with an aging furnace
- Both units keep needing repairs
- Both the heating and cooling equipment are 15 years old or more
What Moves the Price
- Permits and electrical work
- Duct repair or replacement
- Efficiency ratings: SEER2, AFUE and HSPF2
- Equipment sized to the house and climate
- Furnace plus AC, or heat pump plus air handler
- Thermostat and zoning upgrades
We raised the national figures about 8% for Mission using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- A load calculation and system design
- Startup, testing and warranty registration
- New, matched heating and cooling equipment
- Removing the old equipment
- Duct connections and sealing
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 Mission; 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
- Get one quote for a heat pump system and one for a furnace plus AC.
- Make every bidder quote the same efficiency ratings, or the prices won't compare.
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
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HVAC System Replacement Questions from Mission Homeowners
How much is full HVAC system replacement in Mission?
Plan on $9,200 to $19,900, with most jobs near $15,100. 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 Mission?
Between late fall and early spring. With 177 days over 90°F, Mission 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 Mission
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Mcallen Miller International Airport; NOAA Storm Events Database 2020-2025, Hidalgo County. Prices are our estimates, not contractor quotes. Updated 2026.