Heat Pump Payback in Waukesha, WI
Will a heat pump pay off in Waukesha, WI?
Waukesha 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 $438 a year here, so the extra spend stays unrecovered. There's no spin on that: Waukesha's numbers say wait.
Not the city you meant?
This runs the same numbers for 3206 US cities, not just Waukesha. Look one up here.
Why Waukesha's climate drives this number
Waukesha has a cold winter that leans hard on heating equipment, 6294 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 394 cooling degree days. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is -5.8°F, and the coldest daily reading in the 2024 station record was -11.2°F. That puts the seasonal coefficient of performance at 2.56 for the recommended cold-climate unit. Waukesha 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. Source: NOAA station Waukesha County Airport, 2.2 miles from Waukesha, the closest one on record.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 6,225 heating kilowatt-hours annually on top of cooling, totalling about $1,238 a year on electricity. Waukesha's gas rate of $10.74 per Mcf, applied to the 66 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $800 a year, against 18.87¢ per kWh for electricity. 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 $12,067 behind.
The break-even point in Waukesha
The heat pump would become the cheaper option in Waukesha if electricity fell to 11.6¢/kWh (from 18.87¢) or gas rose above $17.42 per Mcf (from $10.74). At today's prices a cheaper quote cannot rescue the gas comparison in Waukesha, since there is no yearly saving to recover it from.
Electric resistance heat in Waukesha, compared
Gas isn't universal in Waukesha, many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Waukesha's answer improves. Switching saves about $1,866 a year here, a heat pump moving heat rather than generating it needs far less electricity than resistance coils, so the extra $10,000 spent up front comes back in about 5.4 years.
Where Waukesha ranks in this dataset
Waukesha lands at position 117 out of 3206 cities on heating severity (coldest is 1), and 540 out of 3206 by population size (biggest is 1). 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 Waukesha
About 71,461 people live in Waukesha, 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.
Line up a few local HVAC quotes before you decide.
More on how this number was built
Nothing above is a black box: the methodology guide shows the full arithmetic behind Waukesha's 2.56 seasonal COP and payback figure. Waukesha's -5.8°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here, see what that changes in the cold-climate unit guide.