Cost to Install a Gas Furnace

September 2026821

Gas Furnace Installation Calculator
Item   
Qty
Lower
Higher
Gas Furnace
1 furnace
$1,611.28
$1,880.34
Non-discounted retail pricing for popular: 96% efficiency gas central furnace. 5 ton 120,000 BTU capacity. Gas and 120V connections at unit. 10 yr limited warranty.
Gas Furnace Installation Labor, Basic
1 furnacefurnace
$1,611.28
$1,880.34
Basic minimum labor to install gas furnace with favorable site conditions. Install with existing ductwork. Install 3/4" gas line (up to 20 ft) with shutoff valve. Install branch 120V circuit to unit. Fabricate openings, mounting and vent system. Connect unit to existing ducting. Connect power and gas to unit. Connect thermostat. Power unit and verify proper operation. Includes planning, equipment and material acquisition, area preparation and protection, setup and cleanup. Any additional work is NOT included in cost estimate.
Gas Furnace Installation Job Supplies
1 furnace
$1,611.28
$1,880.34
Cost of related materials and supplies typically required to install gas furnace including: fittings, fasteners and mounting hardware.
Gas Furnace Installation Equipment Allowance
1 furnace
$1,611.28
$1,880.34
Job related costs of specialty equipment used for project quality and efficiency, including: Pipe cutting and threading, tubing cutter, brazing kit and pipe wrenches. Daily rental. Consumables extra.
Option: Remove HVAC Unit
1 furnace
$1,611.28
$1,880.34
Disconnect power, connections and fittings. Disconnect mounting hardware and remove unit from premises. For units up to 200 LBS. Material cost includes dump fee.
Gas Furnace Job Debris Disposal
42.525
48.375
Costs to load, haul away and dispose of old materials, installation waste and associated debris.
Unused Minimum Labor
Balance of 2 hr(s) minimum labor charge that can be applied to other tasks.
Totals - Cost To Install Gas Furnace
$0
$0
Average Cost per Furnace
$0.00
$0.00

In September 2026 the estimated national average cost to Install a Gas Furnace starts at $3,168 - $3,769 per furnace. Use our Cost Calculator for cost estimate examples customized to the location, size and options of your project.

To estimate costs for your project:

1. Set Project Zip Code Enter the Zip Code for the location where labor is hired and materials purchased.

2. Specify Project Size and Options Enter the number of "items" required for the project.

3. Re-calculate Click the "Update" button.

4. Review See "Notes and General Information" for assumptions and appropriate use.


Cost to Install a Gas Furnace - Notes and General Information

This example estimate is for BASIC mid-range work performed in readily serviceable conditions by professionals proficient in all work mentioned above, using popular, IN STOCK products, materials and supplies available at home improvement retailers. Your actual costs will vary due to the unique conditions, requirements, labor options and material choices of your project. Work not mentioned on this page, work with schedule difficulty, work during periods of local labor shortages, and work using high-demand pros or master craftsman, premium materials, custom built products, project supervision may result in HIGHER COSTS!

This example estimate is for educational and illustrative purposes - it is NOT a substitute for written quotes from trade professionals. Homewyse strongly recommends that you contact reputable professionals for itemized assessments of work required and costs for your project - before making any decisions or commitments.

The example estimate includes:

  • Costs for local material / equipment delivery to and service provider transportation to and from the job site.
  • Costs to prepare the worksite for Gas Furnace Installation, including costs to protect existing structure(s), finishes, materials and components.
  • Labor setup time and mobilization time typical of local, small Gas Furnace Installation jobs.

The example estimate does NOT include:

  • Costs for any work or materials not specifically mentioned on this page.
  • Costs for removing, relocating, repairing, or modifying existing framing, surface finishes (including molding) and fixtures, HVAC, electrical, and plumbing systems - or bringing any systems into compliance with current building codes.
  • Costs for testing and remediation of hazardous materials (asbestos, lead, radon, etc.).
  • General contractor overhead and markup for organizing and supervising the Gas Furnace Installation. Add 13% to 22% to the total cost above if a general contractor will supervise this project.
  • Sales tax on materials and supplies.
  • Permit or inspection fees (or portion thereof) required by your local building department for your overall project.

References - Gas Furnace Installation