How Much Does It Cost to Replace a Furnace in Missouri?
When Missouri’s winter chill sets in, a reliable furnace isn’t a luxury, it’s essential. If your system is old, noisy, or struggling to keep up, you might be wondering what a replacement will cost.
The truth? Most homeowners in Missouri spend between $4,000 and $8,000 on a new furnace, depending on the size of the home, energy efficiency rating, and installation complexity.
Here’s a breakdown of what goes into that price and how to make sure you get the best value.
1. Average Furnace Replacement Costs in Missouri
| Furnace Type | Average Installed Cost | Efficiency Rating (AFUE) |
|---|---|---|
| Standard Gas Furnace | $4,000 – $6,500 | 80–90% |
| High-Efficiency Gas Furnace | $6,500 – $8,500 | 95–98% |
| Electric Furnace | $4,000 – $7,000 | 100% (but higher energy cost) |
| Oil Furnace | $5,000 – $9,000 | 80–90% |
🧠 Pro Tip: Even though high-efficiency models cost more upfront, they can save up to 30% on heating bills each year.
2. Factors That Affect Furnace Replacement Cost
Every home is unique and so is every installation. The final cost depends on:
Home size & heating demand: Larger spaces need higher-capacity units.
Fuel type: Gas is most common in Missouri, but electric and heat pumps are rising in popularity.
Energy efficiency: Higher AFUE = higher upfront cost but lower monthly bills.
Ductwork condition: If ducts are old, leaky, or undersized, repairs may add $500–$2,000.
Installation complexity: Tight spaces, attic installs, or zoning systems can raise labor time.
3. Signs It’s Time to Replace Your Furnace
Your system is over 15 years old
Energy bills keep rising despite regular tune-ups
Uneven heating or cold spots in rooms
Frequent repairs or loud noises
Visible rust, cracks, or pilot light issues
If two or more of these apply, replacement is often the more economical choice.
4. Why Missouri Homeowners Choose High-Efficiency Furnaces
Missouri’s mix of cold winters and mild shoulder seasons makes high-efficiency furnaces ideal. They:
Provide steady heat without overworking
Use less fuel and lower utility costs
Qualify for local utility rebates and federal tax credits (up to $2,000 for qualifying systems)
📋 Tip: Ask your technician about ENERGY STAR® models that meet the 2025 DOE standards for efficiency.
Get a Local Furnace Estimate
in Chesterfield, MO and Surrounding Areas
At Fresh Air Heating & Cooling, we believe in transparent pricing and custom comfort solutions. We’ll inspect your current system, measure your home’s heating needs, and provide a written estimate before any work begins.