Cities / Tennessee / Knoxville
Furnace Replacement Cost in Knoxville, TN (2026)
A gas furnace, installed, before rebates
$3,750to$4,800
From a public baseline. How prices are made.
The low and the high are the spread of equipment and labor in the public baseline for a gas furnace in 2026.
Tennessee Rebates in 2026
Enrollment for 2026 is open. Open. This offer applies only to purchases made between January 1, 2026 and December 31, 2026.
Knoxville Utilities Board pays $600 per appliance on a gas furnace at Replace existing electric equipment with a new natural gas furnace, or convert propane equipment to natural gas.. After the rebate the typical price for a gas furnace is $3,450. The chart runs from January 1, 2026 to December 31, 2026. Checked October 22, 2026. How to apply.
| Equipment | Minimum efficiency | Rebate |
|---|---|---|
| Natural gas furnace | Replace existing electric equipment with a new natural gas furnace, or convert propane equipment to natural gas. | $600 per appliance |
Every Program a Knoxville Homeowner Can Use
- Federal 25C credit gives no credit for a 2026 install. Ended.
- Natural Gas Appliance Rebate Program pays up to $600 per appliance. Open now.
- Energy Efficiency Rebates pays up to $1,500 per system. Open now.
- High-Efficiency Electric Home Rebate has not published its amounts yet. Not open yet.
- Smart Thermostat Rewards pays up to $100 per thermostat purchase. Open now.
What It Costs
All 7 systems, low to high
| System | Low | Typical | High | Range drawn |
|---|---|---|---|---|
| Heat pump, ducted | ||||
| 2-ton heat pump 15 SEER | $6,500 | $11,750 | $17,000 | |
| 3-ton heat pump 15 SEER | $7,450 | $13,350 | $19,250 | |
| 4-ton heat pump 15 SEER | $8,400 | $14,950 | $21,500 | |
| 5-ton heat pump 15 SEER | $9,400 | $16,550 | $23,700 | |
| Other systems | ||||
| Central AC only, 3 ton 16 SEER | $4,150 | $6,900 | $9,700 | |
| Gas furnace only, 80,000 BTU 95% AFUE | $3,750 | $4,050 | $4,800 | |
| Mini-split, one zone, 12,000 BTU 20 SEER | $4,500 | $7,500 | $10,500 | |
Sources today: public baseline: NREL National Residential Efficiency Measures Database, 2024 release (read via hvacbase.org, 2026-10-19). Two more sources join as they arrive: Verified contractor ranges and homeowner-reported quotes. 2023 dollars, national. No metro factor is applied in this version. This city publishes no machine-readable permit feed, so no permit facts print. How prices are made.
Common Questions
How much does a gas furnace cost installed in Knoxville?
The installed range is $3,750 to $4,800, with a typical price of $4,050. This is the national public baseline in 2023 dollars. After the rebate the typical price for a gas furnace is $3,450.
What does the Knoxville Utilities Board gas furnace rebate pay in 2026?
$600 per appliance at Replace existing electric equipment with a new natural gas furnace, or convert propane equipment to natural gas., through Natural Gas Appliance Rebate Program. Open. This offer applies only to purchases made between January 1, 2026 and December 31, 2026.
Is there a federal tax credit for a gas furnace in 2026?
The IRS allows the credit for property placed in service before December 31, 2025. A heat pump installed in 2026 gets no federal credit. The utility rebate is the money on the table in 2026.
What do the other systems cost in Knoxville?
A 3-ton central air conditioner runs $4,150 to $9,700, typical $6,900. A 3-ton heat pump runs $7,450 to $19,250, typical $13,350. A one-zone mini-split runs $4,500 to $10,500, typical $7,500. Each range is installed, before rebates.
What size and efficiency does the gas furnace range assume?
The range is for the table row "Gas furnace only, 80,000 BTU" at 95% AFUE. The table on this page lists 7 systems from low to high, each with its own size and efficiency.
Contractors in Knoxville
A Verified contractor is one that published its terms here.
Range quarter 2026-Q4, updated October 22, 2026. Last change: First pages: furnace, AC and heat pump ranges from the public baseline, and the state programs read from each provider. Changelog. Source page: https://hvacvisit.com/tennessee/knoxville/furnace-replacement-cost. Cite a range with a link to the page it is on. Do not republish a page, a table or a dataset in full.