Heat Pump Payback in Suwanee, GA
Will a heat pump pay off in Suwanee, GA?
Suwanee technically pencils out, but only past the point the equipment would need replacing anyway. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $5,500. Suwanee's residents would see roughly $331 a year back in running costs, putting the payback around 16.6 years. That's a technicality, not a recommendation, for anyone actually living in Suwanee.
Checking a different city
Suwanee is one of 3206 cities covered here, each run through the same model. Search another below.
Suwanee's weather, in the numbers that matter
Suwanee has a mild winter by US standards, 2526 heating degree days a year against a 65°F base, and summers are hot enough that cooling matters as much as heating, at 1755 cooling degree days. 10.9°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 10.9°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.96 on the cold-climate unit fit for this climate. Mild on average, but the occasional cold snap is what sizes the equipment: at a 10.9°F design temperature Suwanee falls just under the 25°F line where a standard heat pump starts leaning on resistance backup, so the model prices a cold-climate unit to be safe. These numbers come from Gwinnett Co-Briscoe Fd Apt, the closest NOAA station, 7.7 miles out.
The yearly running costs in Suwanee
Electricity use for heating alone comes out to about 2,161 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $545 a year. That compares with roughly 26 Mcf a year of gas at Suwanee's $20.42 per-Mcf rate, about $876 a year with the old AC included, against a local electricity rate of 14.90¢/kWh. If the current system still worked and you replaced it anyway, the full cost would take longer than the 15-year equipment life to earn back; against buying a new furnace and AC regardless, the 15-year total lands $532 behind.
What would change Suwanee's answer
Gas would only overtake the heat pump in Suwanee if electricity rose past 38.8¢/kWh from 14.90¢, or gas fell under $7.83 per Mcf from $20.42. A useful quote test for Suwanee: the heat pump is worth it within a decade if it costs less than $3,310 more than replacing the furnace and AC, and within 7 years if the gap is under $2,317.
Electric resistance heat in Suwanee, compared
Not every home in Suwanee has gas service. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. About $747 a year comes back this way, enough that the 13.4-year payback clears the $10,000 premium comfortably within the equipment's life.
Suwanee against the rest of the country
Among 3206 cities, Suwanee's winter puts it at rank 2156 for severity, while its size puts it at rank 1712 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.
Next step if you live in Suwanee
Suwanee, Georgia is home to about 23,062 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 Suwanee, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Suwanee's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Suwanee's 2.96 seasonal COP and payback figure. Suwanee's 10.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.