Heat Pump Payback in Mobile, AL
Should Mobile switch to a heat pump?
In Mobile, the math is close enough that it comes down to how long you plan to stay. Against a like-for-like gas furnace and AC swap, going electric costs $3,000 more up front here. Mobile's residents would see roughly $272 a year back in running costs, putting the payback around 11 years. Whether that's worth it in Mobile depends on how many years you expect to own the place.
Not the city you meant?
This runs the same numbers for 3206 US cities, not just Mobile. Look one up here.
The climate behind Mobile's payback figure
Degree days tell the story here: Mobile racks up 1190 heating degree days each year (base 65°F), and summers are severe enough that cooling can dominate the annual bill, with 2984 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 27.7°F, and the coldest daily reading in the 2024 station record was 20.1°F. That puts the seasonal coefficient of performance at 3.03 for the recommended standard unit. A standard ducted system is enough here; Mobile's design temperature doesn't justify the cold-climate premium. Climate figures trace to the nearest NOAA station, Coast Guard Sector, 3.7 miles from Mobile.
Mobile's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 994 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $588 a year. That compares with roughly 12 Mcf a year of gas at Mobile's $17.56 per-Mcf rate, about $860 a year with the old AC included, against a local electricity rate of 16.62¢/kWh. Priced as a standalone purchase, with a working furnace ripped out early, payback would take longer than the 15-year equipment life. Measured against the like-for-like replacement instead, a household here ends 15 years $1,083 ahead.
The break-even point in Mobile
Because the heat pump's better air conditioning saves more electricity than its heating uses, it stays cheaper to run than the current furnace and AC in Mobile at any electricity price. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $272 a year saved, a difference under $1,904 pays back within 7 years here, and under $2,720 within 10.
If your home heats with electric baseboard instead of gas
Plenty of homes in Mobile heat with electricity alone, no gas line involved. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. The saving here runs about $555 a year, which recovers the extra $7,500 spent going electric in roughly 13.5 years.
Mobile against the rest of the country
Mobile lands at position 2799 out of 3206 cities on heating severity (coldest is 1), and 126 out of 3206 by population size (biggest is 1). That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Deciding what's next in Mobile, AL
About 201,367 people live in Mobile, Alabama, and every number on this page is what a contractor would actually work from when quoting a system here, the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Line up a few local HVAC quotes before you decide.
Where Mobile's figure comes from
Every constant behind this page, the 3.03 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Not every home in Mobile has gas; the guide comparing a heat pump against electric baseboard covers that case separately.