Heat Pump Payback in Miami, OK
Miami, OK: the heat pump payback math
The payback math works in Miami on paper, past the equipment's own working life. $5,500 is what Miami would pay extra to go electric rather than replace the furnace and AC with the same again. Miami's residents would see roughly $170 a year back in running costs, putting the payback around 32.4 years. Miami's own numbers say this pencils out only in theory, not in practice.
Not the city you meant?
This runs the same numbers for 3206 US cities, not just Miami. Look one up here.
Why Miami's climate drives this number
Degree days tell the story here: Miami racks up 3219 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1920 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: -4°F here (coldest 2024 reading -14.8°F), which works out to a seasonal COP of 2.6 for the cold-climate class of unit this climate calls for. Below the 25°F line where a standard machine starts leaning on resistance backup, Miami sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, Grove Municipal Airport, 20.9 miles from Miami.
The yearly running costs in Miami
Modelled on a typical 2000-square-foot house, the heat pump draws about 3,135 kWh a year to keep it warm, plus cooling, for a combined electric bill near $625 a year. The gas furnace it replaces burns roughly 34 Mcf a year at $13.99 per Mcf here, for a running cost near $795 a year including the old AC (electricity here runs 13.10¢/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 $2,952 behind.
How sensitive Miami's result is to prices
This result holds unless electricity climbs above 20.5¢/kWh (it is 13.10¢ now) or gas drops below $8.92 per Mcf (now $13.99); past either point, gas becomes the cheaper fuel in Miami. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $170 a year saved, a difference under $1,190 pays back within 7 years here, and under $1,700 within 10.
The other scenario: no gas furnace to begin with
Not every home in Miami has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $769 a year comes back this way, enough that the 13-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Miami ranks in this dataset
Ranked against the other 3206 cities covered, Miami comes in at 1842 for heating severity, 1 would be the coldest place in the dataset, and 2668 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
What to do with this number in Miami
About 12,886 people live in Miami, Oklahoma, 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.
Get quotes from local HVAC contractors before deciding.
Reading further on this page's numbers
The methodology guide walks through exactly how Miami's 2.6 seasonal COP and the rest of this page's numbers get built. Miami's -4°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.