Will a heat pump pay off in McDonough, GA?
McDonough 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. McDonough's residents would see roughly $341 a year back in running costs, putting the payback around 10.3 years. It's a genuine toss-up here — McDonough's numbers don't point clearly either way.
How cold McDonough actually gets
McDonough has a mild winter by US standards — 2513 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1595 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 19.4°F, against a record low of 15.8°F. That puts the seasonal coefficient of performance at 3.17 for the recommended cold-climate unit. A cold-climate unit is the right call in McDonough — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station GRIFFIN SPALDING COUNTY AIRPO, 16.4 miles from McDonough — the closest one on record.
McDonough's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 2,007 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $502 a year. The gas furnace it replaces burns roughly 26 Mcf a year at 20.42 per Mcf here, for a running cost near $842 a year (electricity here runs 14.90¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 39.6 years, leaving the 15-year total $1,611 ahead.
Electric resistance heat in McDonough, compared
Not every home in McDonough 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 $754 a year comes back this way, enough that the 10.6-year payback clears the $8,000 premium comfortably within the equipment's life.
How McDonough compares nationally
Among 3206 cities, McDonough's winter puts it at rank 2174 for severity, while its size puts it at rank 1253 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 McDonough, GA
McDonough, Georgia is home to about 32,803 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 McDonough, nothing is lost by holding off until the current equipment genuinely fails.
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 McDonough's 3.17 seasonal COP and payback figure. McDonough's 19.4°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.