Will a heat pump pay off in Port Wentworth, GA?
In Port Wentworth, a heat pump pays for itself within a reasonable window. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $1,000 after a $2,000 federal tax credit. Port Wentworth's residents would see roughly $296 a year back in running costs, putting the payback around 3.4 years. The window here is reasonable, and it's specific to what Port Wentworth actually pays for power and gas.
How cold Port Wentworth actually gets
Degree days tell the story here: Port Wentworth racks up 1388 heating degree days each year (base 65°F), and summers are severe enough that cooling can dominate the annual bill, with 2695 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 25°F, against a record low of 23°F. That puts the seasonal coefficient of performance at 2.95 for the recommended standard unit. Port Wentworth's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. Source: NOAA station SAVANNAH/HILTON HEAD INTL AIR, 4.2 miles from Port Wentworth — the closest one on record.
Port Wentworth's running-cost comparison, in dollars
Modelled on a typical 2000-square-foot house, the heat pump draws about 1,191 kWh a year to keep it warm, plus cooling, for a combined electric bill near $520 a year. Port Wentworth's gas rate of 20.42 per Mcf, applied to the 14 Mcf a year the furnace burns, puts its running cost near $816 a year, against 14.90¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is roughly 37.2 years, leaving the 15-year total $3,436 ahead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Port Wentworth — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Port Wentworth's answer improves. Switching saves about $524 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $5,500 spent up front comes back in about 10.5 years.
Port Wentworth against the rest of the country
Ranked against the other 3206 cities covered, Port Wentworth comes in at 2733 for heating severity — 1 would be the coldest place in the dataset — and 2406 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.
Next step for 14,865 people in Port Wentworth
Port Wentworth, Georgia is home to about 14,865 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. Given the math above, Port Wentworth is a place worth lining up quotes ahead of a breakdown, not waiting for one.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page — the 2.95 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. The $2,000 federal credit baked into Port Wentworth's number is explained, with the before-and-after math, in the tax credit guide.