Barrington, IL: the heat pump payback math
Here in Barrington, 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. Running costs here land $228 a year HIGHER than the furnace it replaces, so that premium is never recovered. There's no spin on that: Barrington's numbers say wait.
Why Barrington's climate drives this number
Degree days tell the story here: Barrington racks up 4991 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1020 cooling degree days on the cooling side. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is -0.9°F, against a record low of -11°F. That puts the seasonal coefficient of performance at 2.68 for the recommended cold-climate unit. A cold-climate unit is the right call in Barrington — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. These numbers come from PALWAUKEE MUNICIPAL ARPT, the closest NOAA station, 11.6 miles out.
Barrington's running-cost comparison, in dollars
Modelled on a typical 2000-square-foot house, the heat pump draws about 4,716 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,065 a year. That compares with roughly 52 Mcf a year of gas at Barrington's 11.25 per-Mcf rate — about $837 a year — against a local electricity rate of 19.06¢/kWh. Buy it outright, not incrementally, and payback stretches to beyond the 15-year equipment life; over 15 years the net position sits $6,917 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Barrington — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Barrington's answer improves. The saving here runs about $1,596 a year, which recovers the extra $8,000 spent going electric in roughly 5 years.
Where Barrington ranks in this dataset
Ranked against the other 3206 cities covered, Barrington comes in at 734 for heating severity — 1 would be the coldest place in the dataset — and 3062 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 for 10,615 people in Barrington
About 10,615 people live in Barrington, Illinois, 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
Nothing above is a black box: the methodology guide shows the full arithmetic behind Barrington's 2.68 seasonal COP and payback figure. Barrington's -0.9°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.