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HVAC homeowner guide

Furnace Replacement Cost Guide

What a furnace replacement actually costs, what should be included in your estimate, and how to tell if yours looks fair.

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Furnace replacement often happens under pressure - when your heating system fails on a cold night. That urgency is exactly when homeowners are most vulnerable to inflated pricing and vague estimates. This guide gives you the benchmark ranges and the scope checklist you need to evaluate any furnace replacement quote.

Typical cost ranges

National reference ranges. Actual pricing still depends on region, scope, equipment, and labor conditions.

Job typeLowHigh
Gas furnace - 80% AFUE (single stage)$700$1,400
Gas furnace - 96% AFUE (two stage)$1,100$2,200
Furnace replacement - full install (labor + equipment)$2,500$5,500
High-efficiency furnace install (96%+ AFUE)$3,500$7,000
Furnace installation labor only$500$1,200
Permit and inspection$75$250
01Questions to use

What affects furnace replacement pricing

  • ?AFUE efficiency rating: 80% AFUE is standard; 96%+ costs more but uses less gas
  • ?Single-stage vs. two-stage vs. variable-speed: each tier adds cost
  • ?Venting method: high-efficiency furnaces use PVC pipe (lower cost); standard uses metal flue
  • ?Size (BTU output): must match your home's heating load - upsizing is sometimes used to inflate cost
  • ?Existing ductwork condition and whether it needs modification
  • ?Regional labor markets: HVAC labor rates vary significantly by city
  • ?Gas line modifications if the new furnace is in a different location
  • ?Electrical upgrades if the panel needs a new circuit for the furnace
02Review standard

What a complete furnace replacement estimate should include

  • ✓Furnace brand, model number, BTU input, and AFUE rating
  • ✓Labor broken out by hours and rate - not bundled
  • ✓Venting: new flue pipe or PVC vent run, itemized
  • ✓Gas line connection and pressure test
  • ✓Air filter and filter housing (new or reuse of existing)
  • ✓Permit and mechanical inspection, included and pulled by contractor
  • ✓Start-up, testing, and combustion analysis
  • ✓Manufacturer warranty: years on heat exchanger, parts, and labor warranty from contractor
  • ✓Removal and disposal of old unit
03Watch closely

Red flags in furnace replacement quotes

  • !No model number or AFUE rating listed - you cannot compare equipment you cannot identify
  • !Labor and equipment bundled into one total - ask for itemized breakdown
  • !Permit not included - often used as an add-on charge after signing
  • !Unit upsized significantly without explanation (should match heat load calculation)
  • !Same-day pressure or "limited time" pricing on a non-emergency job
  • !No written labor warranty - verbal assurances are not enforceable
  • !Disposal fee added separately when it is typically included in labor cost

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Frequently asked questions

What is a fair price for furnace replacement?+

A standard gas furnace replacement with equipment plus full installation typically ranges from $2,500 to $5,500 nationally. High-efficiency models (96%+ AFUE) and more complex installations push the range to $3,500–$7,000. Equipment alone for an 80% AFUE unit costs $700–$1,400 before installation.

How long does furnace replacement take?+

Most standard furnace replacements take 4–8 hours for a single technician or a two-person crew. If ductwork modifications, gas line changes, or new venting routes are required, the job can take a full day or more.

Should I replace my AC and furnace at the same time?+

HVAC manufacturers and contractors often recommend replacing both at the same time if the furnace is more than 10 years old when you replace the AC. Matched systems operate more efficiently, and bundling the job often reduces total installation cost. Ask for a bundled bid and compare it to separate quotes.

What AFUE rating is worth the upgrade?+

96% AFUE reduces gas consumption by roughly 17% compared to an 80% AFUE unit. Depending on your climate and annual heating bill, the payback period is typically 8–12 years. In colder climates (Minnesota, Chicago, Denver), the upgrade usually pays off. In milder climates, the math is closer.

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