Heat Pump Payback in River Forest, IL
Heat pump vs. gas furnace in River Forest, IL
Here in River Forest, the honest answer is that a heat pump raises your annual running cost. $5,500 is what River Forest would pay extra to go electric rather than replace the furnace and AC with the same again. Unfortunately the electric bill outweighs the gas bill it replaces by about $240 a year here, so the extra spend stays unrecovered. There's no spin on that: River Forest's numbers say wait.
Compare against another city
This runs the same numbers for 3206 US cities, not just River Forest. Look one up here.
Why River Forest's climate drives this number
River Forest has a real but manageable winter, 4837 heating degree days a year against a 65°F base, and summers are hot enough that cooling matters as much as heating, at 1162 cooling degree days. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is -5.1°F, and the coldest daily reading in the 2024 station record was -9.9°F. That puts the seasonal coefficient of performance at 2.58 for the recommended cold-climate unit. River Forest 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. Climate figures trace to the nearest NOAA station, Chicago O'Hare International, 7.3 miles from River Forest.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 4,747 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,094 a year. The gas furnace it replaces burns roughly 50 Mcf a year at $11.25 per Mcf here, for a running cost near $854 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 $9,099 behind.
What would change River Forest's answer
The heat pump would become the cheaper option in River Forest if electricity fell to 13.4¢/kWh (from 19.06¢) or gas rose above $16.01 per Mcf (from $11.25). At today's prices a cheaper quote cannot rescue the gas comparison in River Forest, since there is no yearly saving to recover it from.
If your home heats with electric baseboard instead of gas
Not every home in River Forest has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $1,528 a year here, a heat pump moving heat rather than generating it needs far less electricity than resistance coils, so the extra $10,000 spent up front comes back in about 6.5 years.
How River Forest compares nationally
River Forest lands at position 928 out of 3206 cities on heating severity (coldest is 1), and 2819 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 if you live in River Forest
About 11,909 people live in River Forest, 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.
Where River Forest's figure comes from
Every constant behind this page, the 2.58 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. At a -5.1°F design temperature, River Forest sits in cold-climate territory; the guide to that class of unit explains why.