Heat Pump Payback in Johnson City, TN
Johnson City, TN: the heat pump payback math
Johnson City technically pencils out, but only past the point the equipment would need replacing anyway. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $5,500. Johnson City's residents would see roughly $91 a year back in running costs, putting the payback around 60.4 years. Johnson City's own numbers say this pencils out only in theory, not in practice.
Compare against another city
This runs the same numbers for 3206 US cities, not just Johnson City. Look one up here.
Why Johnson City's climate drives this number
Degree days tell the story here: Johnson City racks up 3585 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1209 cooling degree days on the cooling side. 10.9°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 3°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.96 on the cold-climate unit fit for this climate. Johnson City needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. Climate figures trace to the nearest NOAA station, Tri-Cities Regional Tn/Va Air, 9.6 miles from Johnson City.
Johnson City's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 3,067 heating kilowatt-hours annually on top of cooling, totalling about $568 a year on electricity. Johnson City's gas rate of $11.84 per Mcf, applied to the 37 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $659 a year, against 13.87¢ per kWh for electricity. 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 $4,134 behind.
The break-even point in Johnson City
This result holds unless electricity climbs above 17.5¢/kWh (it is 13.87¢ now) or gas drops below $9.40 per Mcf (now $11.84); past either point, gas becomes the cheaper fuel in Johnson City. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $91 a year saved, a difference under $637 pays back within 7 years here, and under $910 within 10.
Electric resistance heat in Johnson City, compared
Gas isn't universal in Johnson City, many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $908 a year, which recovers the extra $10,000 spent going electric in roughly 11 years.
How Johnson City compares nationally
Ranked against the other 3206 cities covered, Johnson City comes in at 1746 for heating severity, 1 would be the coldest place in the dataset, and 522 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
Next step if you live in Johnson City
About 73,635 people live in Johnson City, 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 Johnson City's figure comes from
The methodology guide walks through exactly how Johnson City's 2.96 seasonal COP and the rest of this page's numbers get built. Johnson City's 10.9°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.