Heat pump vs. gas furnace in Stockbridge, GA
This one's marginal in Stockbridge: 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 $339 saved annually, for a payback of roughly 10.3 years. Whether that's worth it in Stockbridge depends on how many years you expect to own the place.
The climate behind Stockbridge's payback figure
2093 heating degree days pile up here every year, so Stockbridge has a mild winter by US standards; the cooling side runs to 2333 cooling degree days, where summers are hot enough that cooling matters as much as heating. 14°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 12.9°F on file. Worked through the model, that's a seasonal COP of 3.04 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Stockbridge sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station HARTSFIELD-JACKSON ATLANTA IN, 13.9 miles from Stockbridge — 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 1,743 kWh a year to keep it warm, plus cooling, for a combined electric bill near $556 a year. The gas furnace it replaces burns roughly 22 Mcf a year at 20.42 per Mcf here, for a running cost near $896 a year (electricity here runs 14.90¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 39.8 years, leaving the 15-year total $1,592 ahead.
If your home heats with electric baseboard instead of gas
Not every home in Stockbridge has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $684 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 11.7 years.
Where Stockbridge ranks in this dataset
Ranked against the other 3206 cities covered, Stockbridge comes in at 2383 for heating severity — 1 would be the coldest place in the dataset — and 1148 by population, where 1 is largest. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Deciding what's next in Stockbridge, GA
About 35,893 people live in Stockbridge, 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.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
Every constant behind this page — the 3.04 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. At a 14°F design temperature, Stockbridge sits in cold-climate territory; the guide to that class of unit explains why.