Prosper, TX: the heat pump payback math
This one's marginal in Prosper: it only clears if you stay long enough. $3,500 is what Prosper 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. Lower bills claw that back: about $341 saved annually, for a payback of roughly 10.3 years. Whether that's worth it in Prosper depends on how many years you expect to own the place.
The climate behind Prosper's payback figure
1985 heating degree days pile up here every year, so Prosper has a mild winter by US standards; the cooling side runs to 2940 cooling degree days, where summers are severe enough that cooling can dominate the annual bill. 12°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 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, Prosper sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from MCKINNEY MUNICIPAL ARPT, the closest NOAA station, 13 miles out.
The month-to-month numbers for Prosper
Modelled on a typical 2000-square-foot house, the heat pump draws about 1,681 kWh a year to keep it warm, plus cooling, for a combined electric bill near $676 a year. Prosper's gas rate of 19.42 per Mcf, applied to the 21 Mcf a year the furnace burns, puts its running cost near $1,017 a year, against 16.15¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 39.6 years, for a 15-year net position $1,608 ahead.
Electric resistance heat in Prosper, compared
Plenty of homes in Prosper heat with electricity alone, no gas line involved. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $751 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 10.7 years.
How Prosper compares nationally
Among 3206 cities, Prosper's winter puts it at rank 2431 for severity, while its size puts it at rank 925 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 Prosper, TX
About 44,503 people live in Prosper, Texas, 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
Nothing above is a black box: the methodology guide shows the full arithmetic behind Prosper's 2.99 seasonal COP and payback figure. Prosper's 12°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.