Heat pump vs. gas furnace in Carthage, MO
In Carthage, the extra upfront cost technically comes back, just not before the equipment wears out. $3,500 is what Carthage would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Carthage's residents would see roughly $232 a year back in running costs, putting the payback around 15.1 years. Carthage's own numbers say this pencils out only in theory, not in practice.
The climate behind Carthage's payback figure
3249 heating degree days pile up here every year, so Carthage has a real but manageable winter; the cooling side runs to 1898 cooling degree days, where summers are hot enough that cooling matters as much as heating. 3°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -7.1°F on file. Worked through the model, that's a seasonal COP of 2.77 on the cold-climate unit fit for this climate. A cold-climate unit is the right call in Carthage — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, JOPLIN REGIONAL AIRPORT, 9.5 miles from Carthage.
Carthage's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 2,970 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $589 a year. Carthage's gas rate of 14.94 per Mcf, applied to the 34 Mcf a year the furnace burns, puts its running cost near $821 a year, against 12.83¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 58.1 years, for a 15-year net position $13 behind.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Carthage — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. About $782 a year comes back this way, enough that the 10.2-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Carthage ranks in this dataset
Carthage lands at position 1835 out of 3206 cities on heating severity (coldest is 1), and 2324 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
What to do with this number in Carthage
About 15,703 people live in Carthage, Missouri, 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.
More on how this number was built
Nothing above is a black box: the methodology guide shows the full arithmetic behind Carthage's 2.77 seasonal COP and payback figure. Carthage's 3°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.