What Does Furnace Replacement Cost for Most Homeowners?

Most homeowners spend about $2,500 to $7,500 for a standard gas furnace replacement, with installation typically taking 4–8 hours. The biggest cost driver is the furnace’s size and efficiency rating, since higher-efficiency models and larger capacities require more materials and setup.

We replace and install furnaces throughout the Henning area with proper sizing and industry‑standard installation, and we size by heat load, not square footage alone. Final pricing is confirmed after an on-site assessment of your ductwork and venting. If your heat exchanger has failed or the system is very old, replacement often costs less long-term than repeated repairs. Eligible projects may qualify for up to a $1,500 rebate on a Trane heating and cooling system.

Look for these items that can change the total:

• Ductwork changes or sealing
• Venting or gas line modifications
• Smart thermostat or indoor air quality add-ons
• Accessibility of the install area

Schedule an in-home assessment to get an exact quote and the right size for your home.

Updated: 2026-10-06

Need help in Henning, IL? Call 217-247-4108 or book online.