Should Hartford switch to a heat pump?

In Hartford, a heat pump would cost more to run each year than what you have now. $3,500 is what Hartford would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Unfortunately the electric bill outweighs the gas bill it replaces by about $409 a year here, so the extra spend stays unrecovered. That's Hartford's own climate and rates talking, not a hedge or a caveat.

How cold Hartford actually gets

Degree days tell the story here: Hartford racks up 5993 heating degree days each year (base 65°F), and summers rarely ask much of an air conditioner, with 266 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: -4°F here (record low -9.4°F), which works out to a seasonal COP of 2.6 for the cold-climate class of unit this climate calls for. A cold-climate unit is the right call in Hartford — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, WEST BEND MUNICIPAL ARPT, 13.9 miles from Hartford.

The month-to-month numbers for Hartford

Modelled on a typical 2000-square-foot house, the heat pump draws about 5,837 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,144 a year. The gas furnace it replaces burns roughly 62 Mcf a year at 10.74 per Mcf here, for a running cost near $735 a year (electricity here runs 18.87¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $9,632 behind.

The other scenario: no gas furnace to begin with

Gas isn't universal in Hartford — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Hartford's answer improves. The saving here runs about $1,784 a year, which recovers the extra $8,000 spent going electric in roughly 4.5 years.

How Hartford compares nationally

Hartford lands at position 243 out of 3206 cities on heating severity (coldest is 1), and 2296 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.

Next step for 15,984 people in Hartford

Hartford, Wisconsin is home to about 15,984 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 Hartford, nothing is lost by holding off until the current equipment genuinely fails.

Line up a few local HVAC quotes before you decide.

Reading further on this page's numbers

Nothing above is a black box: the methodology guide shows the full arithmetic behind Hartford's 2.6 seasonal COP and payback figure. Hartford's -4°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.