Will a heat pump pay off in Hernando, MS?
In Hernando, the math is close enough that it comes down to how long you plan to stay. 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). Hernando's residents would see roughly $265 a year back in running costs, putting the payback around 13.2 years. Whether that's worth it in Hernando depends on how many years you expect to own the place.
The climate behind Hernando's payback figure
Hernando has a mild winter by US standards — 2396 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 2383 cooling degree days. 12°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 1.9°F on file. Worked through the model, that's a seasonal COP of 2.99 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Hernando sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from MEMPHIS INTERNATIONAL AIRPORT, the closest NOAA station, 14.3 miles out.
The month-to-month numbers for Hernando
A 2000-square-foot house here would pull roughly 2,029 heating kilowatt-hours annually on top of cooling, totalling about $628 a year on electricity. That compares with roughly 25 Mcf a year of gas at Hernando's 16.64 per-Mcf rate — about $893 a year — against a local electricity rate of 15.47¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 51 years, leaving the 15-year total $472 ahead.
The other scenario: no gas furnace to begin with
Not every home in Hernando has gas service. Swap the comparison to resistance heat instead of gas, and Hernando's answer improves. Switching saves about $788 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 10.2 years.
How Hernando compares nationally
Among 3206 cities, Hernando's winter puts it at rank 2240 for severity, while its size puts it at rank 2048 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.
Deciding what's next in Hernando, MS
About 18,542 people live in Hernando, 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.
Line up a few local HVAC quotes before you decide.
More on how this number was built
The methodology guide walks through exactly how Hernando's 2.99 seasonal COP and the rest of this page's numbers get built. At a 12°F design temperature, Hernando sits in cold-climate territory; the guide to that class of unit explains why.