Heat Pump Payback in Waunakee, WI
Is a heat pump worth it in Waunakee?
Waunakee is a place where a heat pump genuinely costs more to operate than the alternative. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. Unfortunately the electric bill outweighs the gas bill it replaces by about $403 a year here, so the extra spend stays unrecovered. There's no spin on that: Waunakee's numbers say wait.
Not the city you meant?
This runs the same numbers for 3206 US cities, not just Waunakee. Look one up here.
The climate behind Waunakee's payback figure
5775 heating degree days pile up here every year, so Waunakee has a cold winter that leans hard on heating equipment; the cooling side runs to 761 cooling degree days, where summers add a moderate cooling load. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is -9°F, and the coldest daily reading in the 2024 station record was -11°F. That puts the seasonal coefficient of performance at 2.48 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Waunakee sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station Dane Co Regional-Truax Field, 5.8 miles from Waunakee, the closest one on record.
The yearly running costs in Waunakee
Modelled on a typical 2000-square-foot house, the heat pump draws about 5,896 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,235 a year. The gas furnace it replaces burns roughly 60 Mcf a year at $10.74 per Mcf here, for a running cost near $832 a year including the old AC (electricity here runs 18.87¢/kWh). With running costs higher every year, there is no payback at any purchase price; over 15 years, against a like-for-like replacement, a household here would end $11,545 behind.
The break-even point in Waunakee
The heat pump would become the cheaper option in Waunakee if electricity fell to 11.6¢/kWh (from 18.87¢) or gas rose above $17.44 per Mcf (from $10.74). At today's prices a cheaper quote cannot rescue the gas comparison in Waunakee, since there is no yearly saving to recover it from.
The other scenario: no gas furnace to begin with
Gas isn't universal in Waunakee, many houses run on electric heat already. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. About $1,710 a year comes back this way, enough that the 5.8-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Waunakee ranks in this dataset
Ranked against the other 3206 cities covered, Waunakee comes in at 289 for heating severity, 1 would be the coldest place in the dataset, and 2262 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Next step if you live in Waunakee
About 16,363 people live in Waunakee, Wisconsin, 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.
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 2.48 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Waunakee's -9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.