Horn Lake, MS: the heat pump payback math
This one's marginal in Horn Lake: it only clears if you stay long enough. 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). Lower bills claw that back: about $265 saved annually, for a payback of roughly 13.2 years. Whether that's worth it in Horn Lake depends on how many years you expect to own the place.
The climate behind Horn Lake's payback figure
Horn Lake 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. A cold-climate unit is the right call in Horn Lake — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station MEMPHIS INTERNATIONAL AIRPORT, 8 miles from Horn Lake — the closest one on record.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 2,029 kWh a year to keep it warm, plus cooling, for a combined electric bill near $628 a year. The gas furnace it replaces burns roughly 25 Mcf a year at 16.64 per Mcf here, for a running cost near $893 a year (electricity here runs 15.47¢/kWh). Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 51 years, for a 15-year net position $472 ahead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Horn Lake — 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 $788 a year comes back this way, enough that the 10.2-year payback clears the $8,000 premium comfortably within the equipment's life.
How Horn Lake compares nationally
Horn Lake lands at position 2239 out of 3206 cities on heating severity (coldest is 1), and 1503 out of 3206 by population size (biggest is 1). 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 Horn Lake
About 26,574 people live in Horn Lake, 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.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page — the 2.99 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Horn Lake's 12°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.