HVAC Services in San Marcos, TX
NOAA's 1991-2020 climate normals put San Marcos at 1,620 heating degree days and 2,973 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. A normal year brings 20 nights at or below freezing and 117 days over 90°F. For a 2,000 sq ft house, this climate points to a heating load somewhere near 35,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
Local Price Guide
| Service | San Marcos estimate |
|---|---|
| AC Installation in San Marcos | $4,400 to $9,900 |
| AC Repair in San Marcos | $160 to $730 |
| Heat Pump Installation in San Marcos | $5,700 to $14,000 |
| Heat Pump Repair in San Marcos | $180 to $880 |
| HVAC System Replacement in San Marcos | $8,800 to $19,200 |
| Ductless Mini-Split Installation in San Marcos | $3,300 to $7,800 |
| Emergency HVAC Repair in San Marcos | $260 to $1,040 |
| Furnace Replacement in San Marcos | $2,700 to $6,600 |
| Furnace Repair in San Marcos | $130 to $550 |
| HVAC Tune-Up & Maintenance in San Marcos | $80 to $240 |
| Boiler Replacement in San Marcos | $4,600 to $10,500 |
| Air Duct Cleaning in San Marcos | $320 to $720 |
Homes in San Marcos
Census figures put the median build year in San Marcos at 1998, so a typical house here has about 28 years on it. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. About 8,400 households here own their home, 30.5% of the occupied total. The median home value is $269,700, and median household income is $51,030. We use both figures to adjust labor and pricing for this page.
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