Vetted hvac providers across 15 Missouri cities. Each provider is scored on a 0–100 Vouched Score blending public-record signals, customer reviews, and editorial assessment. See methodology →
Local cost drivers — climate, code, utility rebates, and refrigerant rules — that shape hvac pricing in Missouri.
Missouri's humid-continental climate creates a true dual heating-and-cooling load — hot, humid summers demand strong cooling and dehumidification while cold winters require reliable heating — and the state's severe-weather corridor (frequent thunderstorms, hail, and high winds) damages outdoor condenser units and drives replacement demand, so both repair and replacement volume stay high.
The rebate landscape shifted recently: Ameren Missouri's standalone Heating & Cooling rebate ended January 1, 2025, and HVAC incentives now flow through its PAYS (Pay As You Save) program — roughly $1,000 for a 15.2+ SEER2 central AC and up to $2,000 for an air-source heat pump replacing electric resistance, repaid on the utility bill — while Evergy's Missouri territory runs a similar FastTrack HVAC PAYS program (launched August 2025) with up to $1,000+ on qualifying high-efficiency equipment; both pair with the federal 25C tax credit.
Missouri has no statewide HVAC or mechanical contractor license — licensing is local: St. Louis County issues mechanical certificates of qualification (renewed every three years) and Kansas City issues HVAC certificates (renewed every two years), with St. Louis City and other municipalities running separate rules — so confirm local licensing where the work is performed, and note that refrigerant handling always requires federal EPA Section 608 certification.
Last updated May 11, 2026
Estimated ranges for Missouri. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| AC repair (typical service call) | $150–$650 |
| Furnace repair | $150–$900 |
| Tune-up / annual maintenance visit | $90–$200 |
| Full AC system replacement (3-ton, installed) | $5,500–$13,000 |
| Furnace replacement (installed) | $3,000–$8,500 |
| Heat pump installation | $5,000–$14,500 |
| Mini-split (single-zone, installed) | $2,500–$6,500 |
| Duct cleaning (whole-home) | $350–$800 |
| Duct sealing (Aeroseal or similar) | $1,500–$3,500 |
| Whole-house humidifier (installed) | $400–$2,500 |
| Whole-house dehumidifier (installed) | $1,500–$3,500 |
| Emergency / after-hours service premium | $150–$500 |
See broader context: HVAC pricing nationwide