Heat Pump Payback in Goodlettsville, TN
Should Goodlettsville switch to a heat pump?
In Goodlettsville, the extra upfront cost technically comes back, just not before the equipment wears out. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. Lower bills claw that back: about $136 saved annually, for a payback of roughly 40.3 years. Goodlettsville's own numbers say this pencils out only in theory, not in practice.
Checking a different city
This runs the same numbers for 3206 US cities, not just Goodlettsville. Look one up here.
Why Goodlettsville's climate drives this number
2807 heating degree days pile up here every year, so Goodlettsville has a mild winter by US standards; the cooling side runs to 2098 cooling degree days, where summers are hot enough that cooling matters as much as heating. Sizing runs off the design temperature, not the average day: 8.6°F here (coldest 2024 reading -2.2°F), which works out to a seasonal COP of 2.91 for the cold-climate class of unit this climate calls for. The average winter here is gentle, but sizing follows the cold snaps, and 8.6°F is below the 25°F point where a standard unit leans on resistance backup, so a cold-climate unit is what gets priced for Goodlettsville. These numbers come from John C Tune, the closest NOAA station, 14.6 miles out.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 2,443 kWh a year to keep it warm, plus cooling, for a combined electric bill near $587 a year. The gas furnace it replaces burns roughly 29 Mcf a year at $11.84 per Mcf here, for a running cost near $723 a year including the old AC (electricity here runs 13.87¢/kWh). If the current system still worked and you replaced it anyway, the full cost would take longer than the 15-year equipment life to earn back; against buying a new furnace and AC regardless, the 15-year total lands $3,454 behind.
The break-even point in Goodlettsville
This result holds unless electricity climbs above 22.9¢/kWh (it is 13.87¢ now) or gas drops below $7.18 per Mcf (now $11.84); past either point, gas becomes the cheaper fuel in Goodlettsville. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $136 a year saved, a difference under $952 pays back within 7 years here, and under $1,360 within 10.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Goodlettsville, many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $776 a year here, a heat pump moving heat rather than generating it needs far less electricity than resistance coils, so the extra $10,000 spent up front comes back in about 12.9 years.
Where Goodlettsville ranks in this dataset
Ranked against the other 3206 cities covered, Goodlettsville comes in at 1992 for heating severity, 1 would be the coldest place in the dataset, and 2146 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
What to do with this number in Goodlettsville
About 17,433 people live in Goodlettsville, Tennessee, and every number on this page is what a contractor would actually work from when quoting a system here, the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Ask a local HVAC contractor for a quote before committing either way.
Where Goodlettsville's figure comes from
Every constant behind this page, the 2.91 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Goodlettsville's 8.6°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here, see what that changes in the cold-climate unit guide.