Heat pump vs. gas furnace in Sioux Falls, SD
In Sioux Falls, a heat pump would cost more to run each year than what you have now. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Running costs here land $263 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's Sioux Falls's own climate and rates talking, not a hedge or a caveat.
How cold Sioux Falls actually gets
Degree days tell the story here: Sioux Falls racks up 6045 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 852 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 -16.1°F, against a record low of -18.9°F. That puts the seasonal coefficient of performance at 2.31 for the recommended cold-climate unit. Sioux Falls needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. These numbers come from JOE FOSS FIELD AIRPORT, the closest NOAA station, 2.8 miles out.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 6,626 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,040 a year. Sioux Falls's gas rate of 9.86 per Mcf, applied to the 63 Mcf a year the furnace burns, puts its running cost near $777 a year, against 14.15¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs past the 15-year equipment life, for a 15-year net position $7,451 behind.
Electric resistance heat in Sioux Falls, compared
Not every home in Sioux Falls has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $1,282 a year, which recovers the extra $8,000 spent going electric in roughly 6.2 years.
How Sioux Falls compares nationally
Among 3206 cities, Sioux Falls's winter puts it at rank 199 for severity, while its size puts it at rank 117 for population — 1 in both cases being the extreme. That's the coldest third of the dataset, where climate does most of the work behind this figure.
What to do with this number in Sioux Falls
Sioux Falls, South Dakota is home to about 209,289 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 Sioux Falls, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
More on how this number was built
Every constant behind this page — the 2.31 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. At a -16.1°F design temperature, Sioux Falls sits in cold-climate territory; the guide to that class of unit explains why.