Heat Pump Payback in Port Wentworth, GA
Will a heat pump pay off in Port Wentworth, GA?
In Port Wentworth, the math is close enough that it comes down to how long you plan to stay. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,000. Port Wentworth's residents would see roughly $296 a year back in running costs, putting the payback around 10.1 years. It's a genuine toss-up here, Port Wentworth's numbers don't point clearly either way.
Checking a different city
Landed on Port Wentworth by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
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, and the coldest daily reading in the 2024 station record was 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 International 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 the current furnace-and-AC running cost near $816 a year, against 14.90¢ per kWh for electricity. 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 $1,436 ahead.
How sensitive Port Wentworth's result is to prices
In Port Wentworth the cooling savings outweigh the extra electricity for heating, so no plausible change in the electricity rate would make the old furnace and AC cheaper to run. A useful quote test for Port Wentworth: the heat pump is worth it within a decade if it costs less than $2,960 more than replacing the furnace and AC, and within 7 years if the gap is under $2,072.
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 $7,500 spent up front comes back in about 14.3 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 if you live 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. In Port Wentworth, nothing is lost by holding off until the current equipment genuinely fails.
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. Homes in Port Wentworth without gas service should read the electric-resistance comparison instead, the numbers there differ from the gas case above.