HVAC Services in St. Louis, MO
NOAA's 1991-2020 climate normals put St. Louis at 4,291 heating degree days and 1,769 cooling degree days per year. Heating is the bigger job here, and furnaces and heat pumps in St. Louis put in far more hours than the air conditioner. Count on roughly 79 nights below 32°F and 47 afternoons past 90°F in a typical year. Snowfall averages about 14 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 55,000 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 | St. Louis estimate |
|---|---|
| Furnace Replacement in St. Louis | $3,000 to $7,300 |
| Furnace Repair in St. Louis | $140 to $610 |
| Boiler Replacement in St. Louis | $5,100 to $11,700 |
| Heat Pump Installation in St. Louis | $5,100 to $12,600 |
| Heat Pump Repair in St. Louis | $160 to $790 |
| HVAC System Replacement in St. Louis | $7,900 to $17,300 |
| Ductless Mini-Split Installation in St. Louis | $3,000 to $7,000 |
| Emergency HVAC Repair in St. Louis | $230 to $930 |
| AC Installation in St. Louis | $3,800 to $8,600 |
| AC Repair in St. Louis | $140 to $630 |
| HVAC Tune-Up & Maintenance in St. Louis | $80 to $230 |
| Air Duct Cleaning in St. Louis | $310 to $700 |
Homes in St. Louis
Half the homes in St. Louis were built before 1938 (Census ACS median), so the typical house is about 88 years old. Houses that old often still have duct runs sized for an old coal or oil furnace and 60- or 100-amp electrical panels. Both can add cost when new equipment goes in. Owners live in 45.4% of occupied homes, roughly 66,000 households. The median home value is $185,100, and median household income is $55,279. We use both figures to adjust labor and pricing for this page.
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