Will a heat pump pay off in Snellville, GA?
In Snellville, the math is close enough that it comes down to how long you plan to stay. $3,500 is what Snellville 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. That premium is recovered through $331 of lower running costs every year, landing the payback clock at roughly 10.6 years. It's a genuine toss-up here — Snellville's numbers don't point clearly either way.
How cold Snellville actually gets
Degree days tell the story here: Snellville racks up 2526 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1755 cooling degree days on the cooling side. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 10.9°F, against a record low of 10.9°F. That puts the seasonal coefficient of performance at 2.96 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Snellville sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station GWINNETT CO-BRISCOE FD APT, 8.6 miles from Snellville — the closest one on record.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 2,161 heating kilowatt-hours annually on top of cooling, totalling about $545 a year on electricity. That compares with roughly 26 Mcf a year of gas at Snellville's 20.42 per-Mcf rate — about $876 a year — against a local electricity rate of 14.90¢/kWh. Buy it outright, not incrementally, and payback stretches to 40.8 years; over 15 years the net position sits $1,468 ahead.
Electric resistance heat in Snellville, compared
Not every home in Snellville has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $747 a year, which recovers the extra $8,000 spent going electric in roughly 10.7 years.
Snellville against the rest of the country
Among 3206 cities, Snellville's winter puts it at rank 2157 for severity, while its size puts it at rank 1760 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.
What to do with this number in Snellville
Snellville, Georgia is home to about 22,336 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system — this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Snellville, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Where Snellville's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Snellville's 2.96 seasonal COP and payback figure. Snellville's 10.9°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.