ComfortCostGuide

State cost guide

Tennessee: HVAC Replacement Cost Calculator

Most Tennessee homeowners spend between $4,000 and $13,000 to replace an HVAC system, installed. A straight central air conditioner replacement runs $4,000 to $7,500, while a full AC-plus-gas-furnace changeout runs $7,500 to $13,000. Labor in Tennessee runs about 11% below the national baseline, with HVAC technicians earning an average of $27.79 per hour, which keeps installed totals lower here than in many states.

Worked example

Take a 1,900 sq ft two-story home outside Nashville with a 16-year-old split system: an aging condenser outside and a gas furnace in the attic. Because both pieces are near end of life and share the same air handler cabinet and refrigerant lines, replacing them together makes more sense than doing one now and one in two years. With a mid-efficiency matched system, existing ductwork in usable shape, and no major electrical or gas line changes, this job lands near the middle of the $7,500 to $13,000 AC-plus-furnace range, around $10,000. Push toward the high end if the ducts need sealing or resizing, the attic access is tight, or the homeowner steps up to a higher-efficiency, variable-speed system.

Frequently asked questions

How much does it cost to replace an HVAC system in Tennessee?

It depends on what you are replacing. Central air conditioning alone runs $4,000 to $7,500 installed, a gas furnace runs $3,500 to $7,000, and replacing both at once runs $7,500 to $13,000. Heat pumps fall between $6,000 and $12,000.

Is a heat pump a good option for Tennessee's climate?

Tennessee sits in climate zone 3, a mixed-humid region with hot summers and relatively mild winters, which is well suited to heat pump operation. A heat pump handles both heating and cooling from one system and costs $6,000 to $12,000 installed here. Compare that against $7,500 to $13,000 for a separate AC and gas furnace pair before deciding.

Why is HVAC installation cheaper in Tennessee than the national average?

Labor is the main reason. Tennessee's HVAC labor index is 0.89, meaning installation labor runs roughly 11% below the national baseline, with technicians averaging $27.79 per hour. Equipment prices are fairly consistent nationwide, so the savings show up in the labor portion of your quote.

Are ductless mini splits worth it in Tennessee?

Mini splits run $3,500 to $10,000 installed in Tennessee, with the low end covering a single-zone unit and the high end covering multi-zone setups. They are most cost-effective for additions, converted garages, bonus rooms over the garage, or older homes with no existing ductwork. If your home already has usable ducts, a conventional system in the $4,000 to $7,500 range is usually the better value.

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

If both units are a similar age, replacing them together usually costs less than two separate jobs. In Tennessee, a combined AC-plus-furnace replacement runs $7,500 to $13,000, versus $4,000 to $7,500 for AC alone plus $3,500 to $7,000 for a furnace later. You also avoid paying twice for the same labor, permits, and trip charges.

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