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HVAC

Furnace Replacement Cost Calculator and Estimate

Create a furnace replacement cost estimate by heated area, furnace type, AFUE efficiency, duct or venting changes, access, removal, permits, and add-ons before comparing HVAC bids.

Starter planning range $3,500 - $10,500 Per project; final pricing depends on project conditions.

At a glance

Typical planning range $3,500 - $10,500

Per project before contractor-specific scope and site conditions.

Main cost drivers Heated area, furnace type, efficiency level, and duct or venting work

These inputs move the estimate before local labor, access, permits, and project conditions.

Best next step Compare bids against the same assumptions

Ask contractors to separate included work, allowances, exclusions, and change-order rules.

Interactive estimate

Estimate your project cost

Use this furnace replacement cost estimate to compare how much a furnace replacement costs by heated area, furnace type, AFUE efficiency, gas-versus-electric fuel, duct or venting changes, condensate drainage, permits, removal, and local HVAC labor.

Estimated range $3,500 - $10,500 Use this as a planning range, then compare contractor quotes against the same assumptions.
Project supplies to check View full supply checklist Product links may earn GetCosts.com a commission from qualifying purchases.

Project questions this estimate answers

Use these checkpoints to keep the estimate tied to the scope a contractor will actually price.

  • Furnace replacement cost calculator

    Start with heated area, furnace type, AFUE efficiency, duct or venting work, access, removal, permits, and add-ons before comparing HVAC bids.

  • Furnace replacement cost estimate

    Use the estimate to separate basic swaps from high-efficiency gas furnaces, electric furnaces, propane or oil systems, and code-correction scope.

  • How much does furnace replacement cost?

    Check whether the bid includes equipment sizing, removal, thermostat, startup, filter cabinet, flue or PVC venting, condensate drainage, and permits.

  • Gas furnace replacement cost

    Compare standard gas, high-efficiency gas, two-stage, variable-speed, and modulating furnace scopes separately before treating a price as comparable.

  • Furnace replacement cost by home size

    Use home size only as a starting point, then adjust for climate, insulation, duct condition, venting changes, access, and local HVAC labor.

Project supplies

Price-check related tools, parts, fixtures, filters, safety items, and materials before you buy or review a bid.

View full supply checklist

Cost drivers to review

  • Heated area
  • Furnace type
  • Efficiency level
  • Duct or venting work
  • Equipment access
  • Removal and add-ons

How this estimate should work

  1. Estimate furnace replacement scope and cost by home size from heated area, furnace type, efficiency level, duct or venting changes, access, and removal or add-on scope.
  2. Apply installed equipment and labor ranges for gas, electric, propane, oil, high-efficiency, two-stage, variable-speed, and modulating furnaces.
  3. Scale the planning range from a 2,000-square-foot heated-area default so smaller homes, larger homes, and cold-climate sizing assumptions are not compared as one broad furnace price.
  4. Adjust the range for capacity, AFUE rating, flue or PVC venting, condensate drainage, duct repairs, gas or electrical updates, permits, disposal, and local HVAC labor.
  5. Show a planning range and help quote-ready homeowners compare replacement bids against repair recommendations and whole-system HVAC options.

Cost examples

Lower-scope furnace replacement $2,650 - $8,950

A planning example for smaller or simpler furnace replacement work with easier access, fewer upgrades, and limited prep.

Typical furnace replacement $3,500 - $10,500

A planning example around the starter range when heated area, furnace type, and efficiency level are near the middle of the project.

Higher-scope furnace replacement $4,200 - $14,200

A planning example for larger, upgraded, or harder-to-access furnace replacement work with more site prep or coordination.

Furnace replacement cost by furnace type

Furnace type Planning range
Standard natural gas furnace $3,500 - $10,500
High-efficiency gas furnace $4,250 - $12,800
Electric furnace $2,850 - $8,600
Propane or oil furnace $4,600 - $13,900

Furnace replacement cost by heated area

Heated area Planning range
1,200 sq ft $2,100 - $6,300
1,600 sq ft $2,800 - $8,400
2,000 sq ft $3,500 - $10,500
2,500 sq ft $4,400 - $13,100
3,200 sq ft $5,600 - $16,800

Common questions

How much does furnace replacement cost?

A typical furnace replacement planning range is $3,500 - $10,500 per project. Final pricing depends on heated area, furnace type, efficiency level, duct or venting work, local labor rates, access, permits, and project conditions.

What changes a furnace replacement estimate the most?

The biggest changes usually come from project scope, especially heated area, furnace type, efficiency level, duct or venting work. Contractor availability, code requirements, site access, disposal needs, and regional cost pressure can also move the final quote.

How should I compare furnace replacement bids?

Ask each contractor to price the same scope, materials, timeline, cleanup, warranty, and permit assumptions. Then compare what is included, what is excluded, and how each quote handles surprises.

What should I enter in a furnace replacement cost calculator?

A useful furnace replacement cost calculator should account for heated area, furnace type, AFUE efficiency, gas versus electric or propane fuel, duct or venting changes, equipment access, old furnace removal, thermostat or filter-cabinet add-ons, permits, and code-correction scope.

What should a furnace replacement cost estimate include?

A useful furnace replacement cost estimate should separate equipment, labor, old furnace removal, thermostat setup, filter cabinet or humidifier add-ons, flue or PVC venting, condensate drainage, gas or electrical updates, duct repairs, permits, startup testing, cleanup, and warranty assumptions.

How much does gas furnace replacement cost?

Gas furnace replacement usually depends on whether the bid is for a standard single-stage furnace, a high-efficiency condensing furnace, a two-stage or variable-speed system, or a modulating premium unit. Compare gas furnace bids separately when venting, condensate drainage, gas line work, duct changes, or code corrections differ.

Does furnace replacement cost change by home size?

Furnace replacement cost can change by home size because heated area, climate, insulation, duct condition, and heat-load sizing affect equipment capacity and labor. Use the home-size range as a starting point, then compare AFUE rating, furnace type, duct or venting work, access, permits, and included add-ons before treating bids as comparable.

Browse related cost guides when this project overlaps with another trade or quote.

Compare another planning range, bid worksheet, or supply checklist before you call contractors.

Compare contractor bids

Often included

  • Labor and standard materials for furnace replacement.
  • Basic site preparation, cleanup, and disposal assumptions.
  • Standard contractor scheduling and project coordination.

May cost extra

  • Changes related to heated area, furnace type, efficiency level, or duct or venting work.
  • Permits, code upgrades, access issues, repairs, haul-off, or special-order materials.
  • Scope changes discovered after the contractor inspects the site.

Confirm before hiring

  • Whether the bid is fixed-price, allowance-based, or subject to site conditions.
  • What is excluded, what could trigger a change order, and how surprises are priced.
  • Warranty terms, payment schedule, start date, and cleanup responsibilities.

When to request quotes

Use the estimate after you know heated area, furnace type, efficiency level, and duct or venting work well enough to compare the same scope across contractors.

Good time to ask

  • You can describe heated area, furnace type, efficiency level, and duct or venting work without guessing.
  • You have photos, measurements, or notes that show the current furnace replacement scope.
  • You are ready to ask at least two contractors for the same included work, exclusions, warranty, and change-order rules.

Wait until you know more

  • The project scope may change after an inspection, repair decision, insurance review, or permit requirement.
  • You are still deciding between furnace replacement options that would create different material, labor, or access needs.

Before you request quotes

Use these questions to describe your project clearly and compare contractor bids against the same assumptions.

Quote comparison worksheet
  • What is included in a furnace replacement quote, and what would be billed separately?
  • How does heated area change labor, materials, disposal, or timeline?
  • How does furnace type change labor, materials, disposal, or timeline?
  • How does efficiency level change labor, materials, disposal, or timeline?
  • How does duct or venting work change labor, materials, disposal, or timeline?
  • Which assumptions should stay the same when comparing furnace replacement bids?