Furnace Replacement Cost in Kentucky

Furnace replacement in Kentucky costs $3,200 to $7,700 in 2026, though city-to-city prices vary quite a bit. Heating drives most HVAC spending in Kentucky: its larger communities average 4,400 heating and 1,333 cooling degree days a year.

Furnace Replacement Prices in Kentucky Cities

City	Estimate	Heating / cooling degree days
Louisville	$3,200 to $7,700	4,279 / 1,426
Lexington	$3,300 to $8,000	4,432 / 1,289
Bowling Green	$2,900 to $7,100	3,796 / 1,675
Owensboro	$2,900 to $7,100	4,230 / 1,416
Covington	$3,100 to $7,500	4,803 / 1,125

From 2020 through 2025, NOAA recorded 955 winter storm and ice events, 574 heat events, 104 extreme cold events and 754 hail reports in Kentucky. Those are the days when emergency HVAC calls pile up.

When Replacement Makes Sense

The furnace is 15 to 20 years old or more
A repair quote runs past a third of the cost of a new unit
Gas or electric bills keep climbing even though usage hasn't changed
Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
A tech found a cracked heat exchanger, or the CO detector has gone off

What Moves the Price

AFUE rating: a basic 80% unit vs. a 96% condensing furnace
BTU size, which should come from a Manual J load calculation
Single-stage, two-stage or modulating gas valve
New PVC venting if you move to a condensing model
Permit and inspection fees, which the local building department sets
Condition of the existing ductwork and any changes it needs

Common Questions

How long does a furnace replacement take?

A straight swap is usually done in one day, somewhere between 4 and 10 hours. Moving to a condensing furnace with new PVC venting can add a few more.

Is a high-efficiency furnace worth it?

In cold climates, a 95%+ AFUE furnace usually earns back the price difference in lower gas bills. Where winters are mild, the payback can take a very long time.

Other HVAC Prices in Kentucky

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