How much does a furnace replacement cost in Florissant, MO?
US national rangeUpdated Prices checked October 20261 source
A furnace replacement costs $2,823 to $6,896 nationally, typical $4,814. We have no documented price index for Florissant for this job, so this is the US national range from HomeAdvisor, checked October 2026.
US national range, not adjusted for this city
- Low
- $2,823
- Typical
- $4,814
- High
- $6,896
Furnace replacement cost in Florissant, MO
We have no documented price index for Florissant for this job, so the table shows the US national range.
| Estimate | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| US national range | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs (HomeAdvisor) | October 2026 |
Furnace replacement cost by type or size
US national figures in USD, as published by each source.
| Type or size | Price (USD) | Source |
|---|---|---|
| Electric furnace | $2,000 to $7,000 | HomeAdvisor |
| Gas furnace | $3,800 to $10,000 | HomeAdvisor |
| Oil furnace | $6,750 to $10,000 | HomeAdvisor |
What drives the cost of a furnace replacement
Fuel type
Electric furnaces cost least to install; oil costs the most.
Efficiency rating
High-AFUE furnaces cost more up front.
Home size
Furnaces are sized at roughly 30 to 60 BTUs per square foot.
Climate
Colder regions need more capacity.
Removal of the old unit
Removal and disposal typically add $150 to $330.
Permits and what's included in Florissant
Permit note
Furnace replacement usually needs a mechanical permit, and gas work may need its own. Ask your local building department for the fee.
Rules are set locally; confirm with Florissant’s building department.
What’s usually included
- The new furnace
- Connection to existing ducts, venting and fuel supply
- Startup and testing
Scopes vary. Get the scope in writing on every quote.
Get furnace replacement quotes in Florissant
Tell us about the job and we will pass it to local pros. Asking for quotes never changes how we rank anyone.
Two short steps: your name, then how to reach you. Free, and it never changes anyone’s rank.
Top-ranked HVAC contractors in Florissant
The top 3 of 446 HVAC contractors we rank for Florissant, MO, by CR Score. Paid placement never changes rank.
- #1Academy Air Heating, Cooling, Plumbing and ElectricCR Score 664.8from 6,727 Google reviews
- #2B & B Heating & CoolingCR Score 654.9from 1,285 Google reviews
- #3Hoffmann BrothersCR Score 654.9from 5,847 Google reviews
Furnace replacement cost in Florissant: questions
How much does a furnace replacement cost in Florissant, MO?
Do I need a permit for a furnace replacement in Florissant?
What affects the cost of a furnace replacement?
How many HVAC contractors serve Florissant?
What is usually included in the price?
Sources
Checked October 2026. Figures are estimates, not quotes.
- HomeAdvisor: Furnace replacement cost · page updated June 17, 2026 · checked October 2026Primary source. Used for: Low, typical and high; prices by fuel; drivers.
Related pages
More cost guides for Florissant
- Roof replacement cost in Florissant
- Roof repair cost in Florissant
- Water heater replacement cost in Florissant
- AC replacement cost in Florissant
- Electrical panel upgrade cost in Florissant
- Interior painting cost in Florissant
- Exterior painting cost in Florissant
- Kitchen remodel cost in Florissant
- Bathroom remodel cost in Florissant
- Hardwood floor installation cost in Florissant
- Fence installation cost in Florissant
- Deck building cost in Florissant
- Siding replacement cost in Florissant
- Window replacement cost in Florissant
- Gutter installation cost in Florissant
- Attic insulation cost in Florissant
- Solar panel installation cost in Florissant
- Garage door repair cost in Florissant
- Foundation repair cost in Florissant
- Tree removal cost in Florissant
- Water damage restoration cost in Florissant
- Concrete driveway cost in Florissant
- Drywall repair cost in Florissant