Heat Pump Payback in Spartanburg, SC
Spartanburg, SC: the heat pump payback math
The payback math works in Spartanburg on paper, past the equipment's own working life. $5,500 is what Spartanburg would pay extra to go electric rather than replace the furnace and AC with the same again. That premium is recovered through $207 of lower running costs every year, landing the payback clock at roughly 26.6 years. Spartanburg's own numbers say this pencils out only in theory, not in practice.
Not the city you meant?
Spartanburg is one of 3206 cities covered here, each run through the same model. Search another below.
The climate behind Spartanburg's payback figure
2098 heating degree days pile up here every year, so Spartanburg has a mild winter by US standards; the cooling side runs to 1461 cooling degree days, where summers are hot enough that cooling matters as much as heating. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is 21.2°F, and the coldest daily reading in the 2024 station record was 10.4°F. That puts the seasonal coefficient of performance at 3.21 for the recommended cold-climate unit. The average winter here is gentle, but sizing follows the cold snaps, and 21.2°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 Spartanburg. These numbers come from Spartanburg, the closest NOAA station, 2.4 miles out.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 1,655 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $469 a year. The gas furnace it replaces burns roughly 22 Mcf a year at $16.91 per Mcf here, for a running cost near $675 a year including the old AC (electricity here runs 16.16¢/kWh). Priced as a standalone purchase, with a working furnace ripped out early, payback would take longer than the 15-year equipment life. Measured against the like-for-like replacement instead, a household here ends 15 years $2,399 behind.
What would change Spartanburg's answer
This result holds unless electricity climbs above 36.7¢/kWh (it is 16.16¢ now) or gas drops below $7.45 per Mcf (now $16.91); past either point, gas becomes the cheaper fuel in Spartanburg. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $207 a year saved, a difference under $1,449 pays back within 7 years here, and under $2,070 within 10.
The other scenario: no gas furnace to begin with
Not every home in Spartanburg has gas service. Swap the comparison to resistance heat instead of gas, and Spartanburg's answer improves. The saving here runs about $696 a year, which recovers the extra $10,000 spent going electric in roughly 14.4 years.
Spartanburg against the rest of the country
Among 3206 cities, Spartanburg's winter puts it at rank 2380 for severity, while its size puts it at rank 1043 for population, 1 in both cases being the extreme. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Next step if you live in Spartanburg
About 39,606 people live in Spartanburg, South Carolina, 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.
Get quotes from local HVAC contractors before deciding.
Where Spartanburg's figure comes from
Every constant behind this page, the 3.21 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Spartanburg's 21.2°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.