Is a heat pump worth it in Grafton?

Here in Grafton, the honest answer is that a heat pump raises your annual running cost. 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. The heat pump would cost about $307 more a year to run than the furnace it replaces — a premium with no payback. There's no spin on that: Grafton's numbers say wait.

The climate behind Grafton's payback figure

5404 heating degree days pile up here every year, so Grafton has a cold winter that leans hard on heating equipment; the cooling side runs to 573 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 -0.4°F, against a record low of -7.1°F. That puts the seasonal coefficient of performance at 2.69 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Grafton sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station PORT WASHINGTON, 5.7 miles from Grafton — the closest one on record.

Grafton's running-cost comparison, in dollars

A 2000-square-foot house here would pull roughly 5,087 heating kilowatt-hours annually on top of cooling, totalling about $1,052 a year on electricity. That compares with roughly 56 Mcf a year of gas at Grafton's 10.74 per-Mcf rate — about $745 a year — against a local electricity rate of 18.87¢/kWh. 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 $8,112 behind.

If your home heats with electric baseboard instead of gas

Plenty of homes in Grafton 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. Switching saves about $1,670 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 4.8 years.

How Grafton compares nationally

Grafton lands at position 428 out of 3206 cities on heating severity (coldest is 1), and 2687 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.

Deciding what's next in Grafton, WI

About 12,741 people live in Grafton, 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.

More on how this number was built

Every constant behind this page — the 2.69 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Grafton's -0.4°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.