Heat Pump Payback in Antioch, IL
Heat pump vs. gas furnace in Antioch, IL
Antioch is a place where a heat pump genuinely costs more to operate than the alternative. $5,500 is what Antioch would pay extra to go electric rather than replace the furnace and AC with the same again. Running costs here land $238 a year higher than the furnace it replaces, so that premium is never recovered. There's no spin on that: Antioch's numbers say wait.
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Why Antioch's climate drives this number
Degree days tell the story here: Antioch racks up 5018 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 920 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, and the coldest daily reading in the 2024 station record was -11°F. That puts the seasonal coefficient of performance at 2.68 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Antioch sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from Kenosha Regional Airport, the closest NOAA station, 10.5 miles out.
The yearly running costs in Antioch
A 2000-square-foot house here would pull roughly 4,741 heating kilowatt-hours annually on top of cooling, totalling about $1,053 a year on electricity. The gas furnace it replaces burns roughly 52 Mcf a year at $11.25 per Mcf here, for a running cost near $815 a year including the old AC (electricity here runs 19.06¢/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 $9,070 behind.
How sensitive Antioch's result is to prices
The heat pump would become the cheaper option in Antioch if electricity fell to 13.6¢/kWh (from 19.06¢) or gas rose above $15.80 per Mcf (from $11.25). At today's prices a cheaper quote cannot rescue the gas comparison in Antioch, since there is no yearly saving to recover it from.
The other scenario: no gas furnace to begin with
Not every home in Antioch has gas service. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. About $1,596 a year comes back this way, enough that the 6.3-year payback clears the $10,000 premium comfortably within the equipment's life.
How Antioch compares nationally
Among 3206 cities, Antioch's winter puts it at rank 676 for severity, while its size puts it at rank 2380 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.
Deciding what's next in Antioch, IL
About 15,108 people live in Antioch, 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.
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 Antioch's 2.68 seasonal COP and payback figure. At a -0.9°F design temperature, Antioch sits in cold-climate territory; the guide to that class of unit explains why.