Heat Pump Payback in Brookfield, WI
Should Brookfield switch to a heat pump?
Brookfield 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. The heat pump would cost about $356 more a year to run than the furnace it replaces, a premium with no payback. There's no spin on that: Brookfield's numbers say wait.
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The climate behind Brookfield's payback figure
5878 heating degree days pile up here every year, so Brookfield has a cold winter that leans hard on heating equipment; the cooling side runs to 552 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 -2.2°F, and the coldest daily reading in the 2024 station record was -9.4°F. That puts the seasonal coefficient of performance at 2.65 for the recommended cold-climate unit. Brookfield 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 Lawrence J Timmerman Airport, the closest NOAA station, 5.4 miles out.
Brookfield's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 5,617 heating kilowatt-hours annually on top of cooling, totalling about $1,149 a year on electricity. That compares with roughly 61 Mcf a year of gas at Brookfield's $10.74 per-Mcf rate, about $792 a year with the old AC included, against a local electricity rate of 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 $10,843 behind.
What would change Brookfield's answer
The heat pump would become the cheaper option in Brookfield if electricity fell to 12.2¢/kWh (from 18.87¢) or gas rose above $16.56 per Mcf (from $10.74). At today's prices a cheaper quote cannot rescue the gas comparison in Brookfield, since there is no yearly saving to recover it from.
If your home heats with electric baseboard instead of gas
Plenty of homes in Brookfield heat with electricity alone, no gas line involved. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. About $1,795 a year comes back this way, enough that the 5.6-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Brookfield ranks in this dataset
Among 3206 cities, Brookfield's winter puts it at rank 267 for severity, while its size puts it at rank 993 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 Brookfield
About 41,268 people live in Brookfield, 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.
Get quotes from local HVAC contractors before deciding.
Where Brookfield's figure comes from
The methodology guide walks through exactly how Brookfield's 2.65 seasonal COP and the rest of this page's numbers get built. At a -2.2°F design temperature, Brookfield sits in cold-climate territory; the guide to that class of unit explains why.