HVAC Cost in Festus, MO in 2026
Most HVAC projects in Festus, MO cost between $4,900 and $16,000. The typical price is $9,000.
Festus prices track the national average closely. Costs here are close enough to the national picture that the adjustment barely moves the number.
What drives the price
- System size in tons and efficiency rating
- Heat pump versus furnace plus AC
- Ductwork condition and whether it is replaced
- Electrical or gas line changes
Usually included
- Equipment and refrigerant lines
- Installation, startup and commissioning
- New thermostat
- Haul-away of the old unit
Usually extra
- Duct replacement
- Electrical panel upgrades
- Permits and inspections
HVAC contractors in Festus, MO
Businesses listed on Google near Festus, MO. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Crystal Heating & Cooling
4.9(3,153 reviews)
3 Cave Industrial Dr, Festus, MO 63028
Vitt Heating & Cooling
4.8(1,327 reviews)
522 Bailey Rd, Crystal City, MO 63019
B. F. Mahn & Sons, Inc.
4.9(963 reviews)
112 W Clement St, De Soto, MO 63020
Perfect Air
4.9(812 reviews)
503 Warne St, Festus, MO 63028
Bone Heating and Cooling
4.9(669 reviews)
2731 Lucas Ln, Festus, MO 63028
Partney Heating and Cooling LLC
4.9(154 reviews)
1359 McNutt St, Herculaneum, MO 63048