Heat Pump Payback in Rock Island, IL
Should Rock Island switch to a heat pump?
Here in Rock Island, 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 $304 more a year to run than the furnace it replaces, a premium with no payback. That's Rock Island's own climate and rates talking, not a hedge or a caveat.
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Rock Island is one of 3206 cities covered here, each run through the same model. Search another below.
How cold Rock Island actually gets
Degree days tell the story here: Rock Island racks up 4885 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1062 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 -11°F, and the coldest daily reading in the 2024 station record was -18.9°F. That puts the seasonal coefficient of performance at 2.44 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Rock Island sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station Quad City International Airpo, 3.2 miles from Rock Island, the closest one on record.
Rock Island's running-cost comparison, in dollars
Modelled on a typical 2000-square-foot house, the heat pump draws about 5,069 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,139 a year. That compares with roughly 51 Mcf a year of gas at Rock Island's $11.25 per-Mcf rate, about $835 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: $10,062 behind after 15 years compared with replacing the furnace and AC like-for-like.
What would change Rock Island's answer
For the verdict in Rock Island to flip, electricity would need to drop to about 12.4¢/kWh from 19.06¢, or gas climb past $17.23 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 Rock Island; 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 Rock Island 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. About $1,481 a year comes back this way, enough that the 6.8-year payback clears the $10,000 premium comfortably within the equipment's life.
How Rock Island compares nationally
Among 3206 cities, Rock Island's winter puts it at rank 875 for severity, while its size puts it at rank 1135 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.
What to do with this number in Rock Island
Rock Island, Illinois is home to about 36,434 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 Rock Island, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Rock Island's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Rock Island's 2.44 seasonal COP and payback figure. Rock Island's -11°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.