Clinton, MS: the heat pump payback math
Clinton technically pencils out, but only past the point the equipment would need replacing anyway. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). Clinton's residents would see roughly $219 a year back in running costs, putting the payback around 16 years. Clinton's own numbers say this pencils out only in theory, not in practice.
Why Clinton's climate drives this number
1947 heating degree days pile up here every year, so Clinton has a mild winter by US standards; the cooling side runs to 1781 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 19.4°F, against a record low of 8.6°F. That puts the seasonal coefficient of performance at 3.17 for the recommended cold-climate unit. Clinton 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. Source: NOAA station JOHN BELL WILLIAMS AIRPORT, 5.3 miles from Clinton — the closest one on record.
Clinton's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 1,555 heating kilowatt-hours annually on top of cooling, totalling about $476 a year on electricity. The gas furnace it replaces burns roughly 20 Mcf a year at 16.64 per Mcf here, for a running cost near $694 a year (electricity here runs 15.47¢/kWh). Buy it outright, not incrementally, and payback stretches to 61.6 years; over 15 years the net position sits $215 behind.
Electric resistance heat in Clinton, compared
Plenty of homes in Clinton heat with electricity alone, no gas line involved. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $644 a year, which recovers the extra $8,000 spent going electric in roughly 12.4 years.
Where Clinton ranks in this dataset
Among 3206 cities, Clinton's winter puts it at rank 2450 for severity, while its size puts it at rank 1499 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.
What to do with this number in Clinton
About 26,617 people live in Clinton, Mississippi, 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 Clinton's figure comes from
Every constant behind this page — the 3.17 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. At a 19.4°F design temperature, Clinton sits in cold-climate territory; the guide to that class of unit explains why.