Atlantic Beach, FL: the heat pump payback math
Atlantic Beach is a clear case: a heat pump beats what you have by a wide margin. $1,000 is what Atlantic Beach would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Atlantic Beach's residents would see roughly $358 a year back in running costs, putting the payback around 2.8 years. That verdict holds specifically for Atlantic Beach's own climate and rates, not a national average.
How cold Atlantic Beach actually gets
Atlantic Beach barely has a winter to speak of — 614 heating degree days a year against a 65°F base — and summers are severe enough that cooling can dominate the annual bill, at 3921 cooling degree days. 37°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 33.1°F on file. Worked through the model, that's a seasonal COP of 3.3 on the standard unit fit for this climate. Atlantic Beach's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. These numbers come from MAYPORT NAF, the closest NOAA station, 4.3 miles out.
Atlantic Beach's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 471 heating kilowatt-hours annually on top of cooling, totalling about $589 a year on electricity. That compares with roughly 6 Mcf a year of gas at Atlantic Beach's 25.48 per-Mcf rate — about $947 a year — against a local electricity rate of 15.43¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 30.7 years, leaving the 15-year total $4,377 ahead.
The other scenario: no gas furnace to begin with
Not every home in Atlantic Beach 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 $435 a year comes back this way, enough that the 12.6-year payback clears the $5,500 premium comfortably within the equipment's life.
Atlantic Beach against the rest of the country
Atlantic Beach lands at position 3021 out of 3206 cities on heating severity (coldest is 1), and 2616 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.
Next step for 13,279 people in Atlantic Beach
Atlantic Beach, Florida is home to about 13,279 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, Atlantic Beach is a place worth lining up quotes ahead of a breakdown, not waiting for one.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
The methodology guide walks through exactly how Atlantic Beach's 3.3 seasonal COP and the rest of this page's numbers get built. The $2,000 federal credit baked into Atlantic Beach's number is explained, with the before-and-after math, in the tax credit guide.