Heat Pump Payback in Des Plaines, IL
Is a heat pump worth it in Des Plaines?
Here in Des Plaines, the honest answer is that a heat pump raises your annual running cost. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. The heat pump would cost about $240 more a year to run than the furnace it replaces, a premium with no payback. That's Des Plaines's own climate and rates talking, not a hedge or a caveat.
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How cold Des Plaines actually gets
4837 heating degree days pile up here every year, so Des Plaines has a real but manageable winter; the cooling side runs to 1162 cooling degree days, where summers are hot enough that cooling matters as much as heating. Sizing runs off the design temperature, not the average day: -5.1°F here (coldest 2024 reading -9.9°F), which works out to a seasonal COP of 2.58 for the cold-climate class of unit this climate calls for. A cold-climate unit is the right call in Des Plaines, 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 Chicago O'Hare International, the closest NOAA station, 5.4 miles out.
The yearly running costs in Des Plaines
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. That compares with roughly 50 Mcf a year of gas at Des Plaines's $11.25 per-Mcf rate, about $854 a year with the old AC included, against a local electricity rate of 19.06¢/kWh. Because the heat pump costs more to run here, the gap only widens with time: $9,099 behind after 15 years compared with replacing the furnace and AC like-for-like.
What would change Des Plaines's answer
For the verdict in Des Plaines to flip, electricity would need to drop to about 13.4¢/kWh from 19.06¢, or gas climb past $16.01 per Mcf from $11.25. A utility offering a lower heat pump rate can change this. Until then, no quote price makes a heat pump pay back against gas in Des Plaines; the case for one here rests on comfort, cooling, or replacing electric heat instead.
The other scenario: no gas furnace to begin with
Plenty of homes in Des Plaines heat with electricity alone, no gas line involved. 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.
Des Plaines against the rest of the country
Among 3206 cities, Des Plaines's winter puts it at rank 904 for severity, while its size puts it at rank 690 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.
Next step if you live in Des Plaines
Des Plaines, Illinois is home to about 58,832 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 Des Plaines, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
More on how this number was built
The methodology guide walks through exactly how Des Plaines's 2.58 seasonal COP and the rest of this page's numbers get built. At a -5.1°F design temperature, Des Plaines sits in cold-climate territory; the guide to that class of unit explains why.