A new gas heating system typically costs $4,000-$12,000 installed, with many standard furnace replacements near $6,500. The final price depends on heating capacity, furnace efficiency, ductwork condition, local labor rates, and whether the project replaces a furnace or adds a complete system.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Gas furnace replacement | $3,500 | $6,500 | $10,000 | Existing compatible ductwork and gas line |
| New furnace with ductwork | $7,000 | $12,000 | $20,000+ | Includes substantial duct installation or changes |
| Gas boiler system | $5,000 | $9,500 | $18,000+ | Radiator or hydronic distribution affects scope |
| Installed furnace per heating ton | $1,000 | $1,600 | $2,500 | Approximate comparison; quotes are usually project-based |
What a new gas furnace costs in a typical home
For a straightforward replacement in a 1,500-2,500-square-foot home, expect about $3,500-$8,500 for a gas furnace and installation. A common midrange quote is $5,500-$7,500 for a 60,000-100,000 BTU furnace, standard venting, removal of the old unit, and connection to existing ducts and gas service. Larger homes or difficult installations can exceed $10,000.
A complete new gas heating system costs more when the home needs ductwork, a new thermostat, gas piping, venting, or electrical work. A system installed in a house without existing ducts may run $7,000-$20,000 or more, depending on the number of registers, access through finished walls, and the size of the home. A gas boiler is a separate system type; replacing one generally falls around $5,000-$18,000.
For a standard furnace swap, a practical planning budget is $5,500-$8,000 before major duct or gas-line work. These figures assume professional installation, ordinary access, and commonly available equipment. Assumptions: U.S. installed prices, existing gas service, standard residential access, and no major structural repairs.
How equipment, labor, and venting shape the quote
Contractor estimates combine equipment with installation tasks and job-specific materials. A quote should identify the furnace model, rated capacity, efficiency, included labor, disposal, and any work needed to bring venting or connections up to code. The ranges below represent typical portions of a standard replacement, not fixed charges that apply to every job.
| Quote component | Typical range | What it covers | Price basis |
|---|---|---|---|
| Furnace equipment | $1,500-$5,000 | Residential gas furnace, excluding installation | Capacity and efficiency |
| Installation labor | $1,200-$3,000 | Removal, setting, connections, startup | Usually 8-16 crew hours |
| Venting and fittings | $150-$1,000 | Pipe, fittings, drain, and vent changes | Materials and routing |
| Thermostat and controls | $100-$700 | Basic or programmable control | Equipment and setup |
| Permit and disposal | $100-$600 | Local permit and old-unit removal | Local rules and haul-away |
Equipment and labor usually make up the largest share of a furnace replacement quote. Ask whether quoted labor includes commissioning, combustion checks, thermostat setup, and a written warranty. For estimating, contractor labor may work out to roughly $75-$150 per technician-hour, though many companies quote a complete job rather than an hourly rate.
Why BTU capacity and AFUE change the installed price
Furnace size and efficiency are major quote drivers. Residential equipment commonly ranges from about 40,000 to 120,000 BTU per hour; larger capacity tends to cost more, but choosing a bigger unit without a proper load calculation can cause short cycling and uneven comfort. A contractor should size the system based on the home, insulation, windows, climate, and duct performance—not square footage alone.
Annual Fuel Utilization Efficiency, or AFUE, describes how much fuel becomes usable heat. Standard-efficiency models around 80% AFUE often cost less upfront than high-efficiency models near 95%-98% AFUE. A high-efficiency furnace may add roughly $1,000-$3,000 to equipment and installation, especially if it requires new PVC venting, a condensate drain, or electrical changes.
Existing equipment type matters, too. Replacing a conventional 80% furnace with a similar model can preserve the existing vent path in some homes. Switching to a condensing furnace may require revised venting and drainage. Moving a furnace, changing from a boiler to forced air, or adding zones can push the project well beyond a like-for-like replacement.
Capacity, efficiency, and compatibility can change the estimate by thousands of dollars. For example, a 60,000-BTU standard-efficiency unit with usable venting is a simpler scope than a 100,000-BTU high-efficiency system requiring new vent runs. Assumptions: Capacity is selected through a professional heating-load calculation, not a rule-of-thumb sizing alone.
Regional furnace prices from urban to rural markets
Local labor, permitting, travel time, and contractor demand create substantial price differences. In lower-cost markets across parts of the Midwest and South, a straightforward replacement may fall near $3,500-$7,000. In many suburban markets, comparable work often ranges from $4,500-$8,500. Major coastal cities and high-cost metro areas may run 15%-30% above a national midrange estimate, with standard replacements reaching $6,000-$11,000.
These are broad comparisons, not guaranteed regional price lists. Older homes in dense cities may require tighter equipment access, specialty venting, or additional inspections. Rural buyers may see fewer contractor options or a travel charge, while local competition can lower quotes in some smaller markets. A gas furnace may also be uncommon or impractical where utility gas is unavailable; extending a gas main is a separate utility project.
Compare local bids for identical equipment and scope rather than relying on a national average. Ask each contractor to specify model number, BTU capacity, AFUE, permit charges, duct changes, and removal so regional price differences can be assessed fairly.
How many hours furnace installation takes
A like-for-like furnace replacement generally takes one workday, or about 6-10 hours for a small crew. A more involved job with vent changes, difficult access, or additional controls can take 1-2 days. New ductwork, moving the furnace, or converting a home from another heating system may extend work to several days or longer.
Labor cost reflects more than time spent carrying in equipment. Technicians disconnect gas and electrical connections, remove the old unit, make transitions to the duct system, connect venting and drainage, start the furnace, and verify safe operation. Work may also require a second visit for inspection or adjustment, depending on local rules and project scope.
One-day replacement pricing assumes the furnace location and most connections remain unchanged. Estimates with unusually low labor allowances should be checked for omitted commissioning, permit coordination, disposal, or cleanup. Typical crew: two technicians for a standard replacement; labor time varies with access and required alterations.
Three installed quote examples for common homes
These examples show how scope affects a gas heating system estimate. Each assumes a licensed contractor and ordinary residential access; actual prices vary by region, equipment availability, and code requirements.
| Project | Equipment and scope | Labor estimate | Installed total |
|---|---|---|---|
| Basic replacement | 60,000-BTU, 80% AFUE; existing ducts and vent retained | 8-10 hours | $4,000-$6,000 |
| Midrange replacement | 80,000-BTU, 96% AFUE; new vent, drain, thermostat | 10-14 hours | $6,500-$10,000 |
| New system in older home | 100,000-BTU furnace plus partial duct installation | 2-4 days | $12,000-$20,000+ |
In the basic example, a furnace may cost $1,500-$2,500, with labor and standard materials accounting for the remainder. The midrange job includes additional vent and drainage work that can add $500-$1,500. The older-home project varies widely: duct routing, wall and floor access, number of supply registers, and patching can each change the total.
Use project scope, not the furnace price alone, to compare these totals. A quote that includes duct installation is not directly comparable with a replacement-only price. Ask for separate line items when a project combines equipment, ductwork, gas piping, or other trades.
Permits, duct repairs, and other charges to verify
Permit and inspection fees commonly add $50-$300 for a straightforward replacement, but some jurisdictions charge more or require additional inspections. Gas-line changes, vent relocation, or a change in heating system type can increase permit costs and may require extra professional work. Local rules determine what is required, so the estimate should state whether the contractor obtains permits and schedules inspections.
Duct sealing or minor repairs can add roughly $300-$1,500. Replacing significant sections of ductwork may cost $2,000-$7,000 or more, depending on system size and access. New gas piping can add $300-$2,000 for a limited run; longer runs, meter changes, or utility work can cost more. Hauling away an old furnace is often included, but separate disposal charges can be $50-$250.
Optional upgrades also need scrutiny. A basic thermostat may be included, while a smart thermostat can add $150-$500 installed. Extended labor or parts coverage may cost several hundred dollars or more. Carbon monoxide detectors, humidifiers, air cleaners, or zoning controls can be useful in specific cases but should appear as separate optional line items.
Confirm permits, disposal, gas connections, duct repairs, and warranty terms in writing. A complete estimate should make clear whether quoted prices include tax, startup testing, and any required code corrections.
Where homeowners can reduce a furnace replacement price
Keeping the furnace in its existing location and retaining safe, functional ductwork can avoid major labor and material costs. Replacing only equipment that has failed may be less expensive than adding zoning, new registers, or unrelated air-quality products. However, an unsafe vent, damaged heat exchanger, or inadequate duct system should not be ignored simply to lower the initial quote.
Compare at least three written estimates using the same capacity range and efficiency level. Request model numbers and a breakdown of labor, permits, venting, disposal, and add-ons. A quote that is $1,000 lower may omit an important task—or may simply reflect lower overhead—so check inclusions rather than choosing on the total alone.
Ask whether a standard-efficiency furnace is compatible with the existing vent and whether a higher-efficiency model is likely to repay its price premium through lower fuel use. Savings depend on local gas rates, winter weather, how much heat the home uses, and how long the household keeps the equipment. Avoid paying for a larger furnace unless a load calculation supports the capacity.
The most dependable savings come from controlling scope and comparing equivalent, fully specified quotes. Scheduling before a no-heat emergency may provide more time to compare contractors, though seasonal availability and prices vary by market.