A gas furnace costs $3,800 to $12,000 installed (unit plus labor), with the unit alone running $700 to $6,200, per HomeGuide (December 2025)2. Angi’s natural-gas row on its all-fuel furnace page and HomeAdvisor’s gas page both publish $3,800 to $10,000 installed — Angi and HomeAdvisor are corporate siblings, and matching figures alone don’t establish independent corroboration; HomeAdvisor labels its page’s range as high-efficiency figures, with an average of $7,00013. Figures below are the latest published data from each source.
Cost by efficiency rating
Efficiency is measured as AFUE (annual fuel utilization efficiency). HomeGuide prices three tiers, unit and installed2:
| Efficiency (AFUE) | Unit cost | Installed cost |
|---|---|---|
| Standard (80%–89%) | $700–$1,800 | $3,800–$6,200 |
| Moderate (90%–95%) | $1,500–$3,700 | $5,200–$8,800 |
| High (96%+) | $2,800–$6,200 | $7,500–$12,000 |
HomeAdvisor’s unit-only figures for the same tiers: standard $500 to $1,500, moderately high $1,000 to $3,000, and true high efficiency $2,000 to $6,000 — presented as published, without reconciling3.
Cost by home size and BTUs
HomeGuide sizes furnaces at 30 to 60 BTUs per square foot of living space and prices accordingly (installed figures exclude ductwork modifications or replacement)2:
| Home size (sq ft) | Furnace size (BTUs) | Unit cost | Installed cost |
|---|---|---|---|
| Up to 1,200 | 40,000–50,000 | $700–$2,300 | $3,800–$6,700 |
| 1,200–1,600 | 50,000–60,000 | $1,000–$2,700 | $4,200–$7,200 |
| 1,600–2,000 | 60,000–70,000 | $1,100–$3,200 | $4,700–$8,000 |
| 2,000–2,500 | 70,000–90,000 | $1,300–$4,800 | $5,100–$9,500 |
| 2,500–3,000+ | 90,000–120,000 | $1,600–$6,200 | $5,800–$12,000 |
HomeAdvisor publishes a separate all-in table for high-efficiency models that sits below HomeGuide’s installed rows: 40,000 BTUs $2,000 to $3,500, 50,000 $2,300 to $3,800, 60,000 $2,500 to $4,200, and 80,000 $3,000 to $4,900 — presented as published3. On sizing, Angi estimates 30 to 60 BTUs per square foot on its all-fuel page, and HomeAdvisor’s climate split is 30 to 35 BTUs per square foot in hot, humid zones versus 50 to 60 in frigid regions13.
Cost by brand
HomeGuide’s installed ranges by manufacturer2:
| Brand | Installed cost (HomeGuide) |
|---|---|
| Amana | $2,100–$8,200 |
| Goodman | $2,100–$6,300 |
| Bryant | $2,300–$7,000 |
| Heil | $2,400–$5,700 |
| Rheem / Ruud | $2,500–$7,800 |
| American Standard | $2,700–$9,000 |
| Coleman | $3,000–$6,700 |
| Lennox | $3,000–$9,500 |
Labor, removal and ductwork
Angi puts furnace installation labor at $75 to $100 per hour (all-fuel page)1. Old furnace removal: Angi publishes $60 to $330, HomeGuide $150 to $400 when not bundled into the install quote — different figures, presented as published12. Ductwork: Angi prices new ductwork at $2,000 to $5,000, while HomeGuide prices minor duct sealing and repairs at $300 to $1,500 and full replacement at $1,400 to $5,600+12. See our ductwork installation cost guide for that project on its own.
Permits
Whether a furnace installation needs a permit depends on your municipality, so confirm with your local building authority before work starts. For budgeting, the siblings publish a permit-fee estimate of $400 to $1,50013.
Repairs and upkeep
HomeGuide prices gas furnace repairs at $100 to $480 on average (at $75 to $150 per hour plus parts), tune-ups at $70 to $200, annual maintenance packages at $150 to $500, and professional cleaning at $70 to $3002. Angi budgets ongoing HVAC maintenance at $60 to $550 per year on its all-fuel page1. For those projects, see our furnace repair cost and furnace tune-up cost guides.
Related cost guides
Start with furnace replacement cost for all fuel types, then compare HVAC installation, HVAC replacement, heat pump cost and central air installation.
The bottom line
Budget $3,800 to $12,000 installed for a gas furnace on HomeGuide’s figures, or $3,800 to $10,000 on the siblings’. Efficiency tier and BTU capacity drive the price, per both publishers’ factor lists, so size the unit to the home first, then get at least three itemized quotes that separate the unit, labor, removal, ductwork and permits.
Sources (each fetched and read October 26, 2026; figures are each publisher’s latest published data):
1. Angi, “How Much Does a New Furnace Cost? [2026 Data]” (updated September 8, 2026; all-fuel page — only its explicitly natural-gas and general rows are used here, with scope noted) — angi.com/articles/how-much-does-it-cost-install-new-furnace.htm
2. HomeGuide, “How Much Does a Gas Furnace Cost? (2026)” (December 31, 2025) — homeguide.com/costs/gas-furnace-prices
3. HomeAdvisor, “How Much Does a Gas Furnace Cost?” (updated June 20, 2026; page labels its figures high-efficiency) — homeadvisor.com/cost/heating-and-cooling/gas-furnace-prices
Related guides
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Propane Furnace Cost (2026 Guide)
Oil Furnace Cost (2026 Guide)
Electric Furnace Cost (2026 Guide)