HVAC System Replacement Cost in Garland, Texas
Full HVAC system replacement in Garland runs about $15,100 for a typical job. Basic installs start near $9,200. High-efficiency equipment with duct or electrical work can reach $20,000.
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Garland Weather and HVAC Load
Garland logs 2,294 heating degree days and 2,612 cooling degree days in a normal year, based on the closest NOAA weather station. Neither season dominates in Garland. That balance is a big reason heat pumps and dual-fuel systems sell well in Texas. A normal year brings 35 nights at or below freezing and 93 days over 90°F. For a 2,000 sq ft house, this climate points to a heating load somewhere near 40,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 2,294 |
|---|---|
| Cooling degree days / year | 2,612 |
| Nights at or below 32°F | 35 |
| Days above 90°F | 93 |
| Average low / high | 55.8°F / 75.8°F |
Garland Housing Stock
Half the homes in Garland were built before 1978 (Census ACS median), so the typical house is about 48 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. Owners live in 61.6% of occupied homes, roughly 50,000 households. Homes here have a median value of $248,900 and households a median income of $74,717. Those two numbers drive the labor adjustment in our estimate.
Dallas County had 44 hail days and 30 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 4 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. Dallas County also had 4 tornado days in that period.
When Replacement Makes Sense
- An old R-22 AC paired with an aging furnace
- Some rooms are uncomfortable, and the energy bills are high
- Both units keep needing repairs
What Moves the Price
- Permits and electrical work
- Efficiency ratings: SEER2, AFUE and HSPF2
- Thermostat and zoning upgrades
- Furnace plus AC, or heat pump plus air handler
- Equipment sized to the house and climate
- Duct repair or replacement
We raised the national figures about 8% for Garland 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
- Duct connections and sealing
- New, matched heating and cooling equipment
- Startup, testing and warranty registration
- A load calculation and system design
- Removing the old equipment
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). Equipment replacements in Garland generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Texas license or registration number and a certificate of insurance with the quote. 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.
- Get one quote for a heat pump system and one for a furnace plus AC.
- 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 Garland Homeowners
How much is full HVAC system replacement in Garland?
Plan on $9,200 to $20,000, 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 Garland?
In spring or fall. Those are the slow months between heating and cooling season in Garland.
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 Garland
- Rowlett $10,600 to $23,000
- Richardson $10,600 to $23,100
- Irving $9,700 to $21,100
- Frisco $13,000 to $28,400
- Laredo $9,400 to $20,400
- McKinney $11,300 to $24,700
- Lubbock $8,000 to $17,400
- Grand Prairie $9,400 to $20,500
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Richardson; NOAA Storm Events Database 2020-2025, Dallas County. Prices are our estimates, not contractor quotes. Updated 2026.