Will a heat pump pay off in Johns Creek, GA?
Johns Creek sits right on the fence — how long you'll own the house decides this one. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Lower bills claw that back: about $344 saved annually, for a payback of roughly 10.2 years. Whether that's worth it in Johns Creek depends on how many years you expect to own the place.
The climate behind Johns Creek's payback figure
Johns Creek has a mild winter by US standards — 2569 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1846 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 10.9°F on file. Worked through the model, that's a seasonal COP of 2.99 on the cold-climate unit fit for this climate. Johns Creek 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. Climate figures trace to the nearest NOAA station, DEKALB-PEACHTREE AIRPORT, 12.3 miles from Johns Creek.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 2,176 heating kilowatt-hours annually on top of cooling, totalling about $559 a year on electricity. The gas furnace it replaces burns roughly 27 Mcf a year at 20.42 per Mcf here, for a running cost near $903 a year (electricity here runs 14.90¢/kWh). Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 39.2 years, for a 15-year net position $1,662 ahead.
Electric resistance heat in Johns Creek, compared
Gas isn't universal in Johns Creek — 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. The saving here runs about $767 a year, which recovers the extra $8,000 spent going electric in roughly 10.4 years.
How Johns Creek compares nationally
Johns Creek lands at position 2104 out of 3206 cities on heating severity (coldest is 1), and 455 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 Johns Creek
About 81,167 people live in Johns Creek, Georgia, 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.
Reading further on this page's numbers
The methodology guide walks through exactly how Johns Creek's 2.99 seasonal COP and the rest of this page's numbers get built. Johns Creek'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.