HVAC System Replacement Cost in Clarksville, Tennessee
Full HVAC system replacement in Clarksville runs about $13,700 for a typical job. Basic installs start near $8,300. High-efficiency equipment with duct or electrical work can reach $18,100.
Compare Free Quotes in Clarksville
Clarksville Weather and HVAC Load
NOAA's 1991-2020 climate normals put Clarksville at 3,756 heating degree days and 1,661 cooling degree days per year. Heating is the bigger job here, and furnaces and heat pumps in Clarksville put in far more hours than the air conditioner. Count on roughly 78 nights below 32°F and 57 afternoons past 90°F in a typical year. For a 2,000 sq ft house, this climate points to a heating load somewhere near 50,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 3,756 |
|---|---|
| Cooling degree days / year | 1,661 |
| Nights at or below 32°F | 78 |
| Days above 90°F | 57 |
| Average low / high | 48.1°F / 70.2°F |
Clarksville Housing Stock
The median Clarksville home dates to 1996, according to the Census ACS. That makes the typical house about 30 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Owners live in 56.6% of occupied homes, roughly 37,000 households. Homes here have a median value of $236,100 and households a median income of $66,786. Those two numbers drive the labor adjustment in our estimate.
NOAA storm reports for Montgomery County show 6 hail days and 31 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 3 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost. Montgomery County also had 2 tornado days in that period.
When Replacement Makes Sense
- Some rooms are uncomfortable, and the energy bills are high
- Both units keep needing repairs
- Both the heating and cooling equipment are 15 years old or more
What Moves the Price
- Efficiency ratings: SEER2, AFUE and HSPF2
- Duct repair or replacement
- Permits and electrical work
- Furnace plus AC, or heat pump plus air handler
- Equipment sized to the house and climate
- Thermostat and zoning upgrades
For Clarksville we kept the national figures close to unchanged, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Startup, testing and warranty registration
- Duct connections and sealing
- Removing the old equipment
- New, matched heating and cooling equipment
- A load calculation and system design
Tennessee Permits, Efficiency Rules and Rebates
Tennessee is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Plan on a mechanical permit for most replacements in Clarksville; the contractor normally pulls it. Before you sign, ask each bidder for their Tennessee license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Make every bidder quote the same efficiency ratings, or the prices won't compare.
- Get one quote for a heat pump system and one for a furnace plus AC.
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
Get Free HVAC System Replacement Quotes in Clarksville
Tell us where you are and up to three licensed local pros will get in touch. You don't have to hire any of them.
HVAC System Replacement Questions from Clarksville Homeowners
How much is full HVAC system replacement in Clarksville?
Plan on $8,300 to $18,100, with most jobs near $13,700. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Clarksville?
Between late spring and early fall. Clarksville averages 78 freezing nights a year, and heating calls spike from November through February.
How often should an HVAC system be replaced?
Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.
Can I replace only the AC and keep my furnace?
Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.
HVAC System Replacement Near Clarksville
- Chattanooga $8,300 to $18,000
- Knoxville $7,800 to $17,000
- Memphis $7,800 to $17,000
- Nashville $9,100 to $19,900
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Clarksville Wastewater Plant; NOAA Storm Events Database 2020-2025, Montgomery County. Prices are our estimates, not contractor quotes. Updated 2026.