Heat Pump Payback in Rockford, IL
Should Rockford switch to a heat pump?
Here in Rockford, 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 $5,500. Running costs here land $350 a year higher than the furnace it replaces, so that premium is never recovered. There's no spin on that: Rockford's numbers say wait.
Compare against another city
This runs the same numbers for 3206 US cities, not just Rockford. Look one up here.
Why Rockford's climate drives this number
Rockford has a cold winter that leans hard on heating equipment, 5277 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 898 cooling degree days. Sizing runs off the design temperature, not the average day: -11°F here (coldest 2024 reading -16.1°F), which works out to a seasonal COP of 2.44 for the cold-climate class of unit this climate calls for. A cold-climate unit is the right call in Rockford, below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station Greater Rockford Airport, 4.8 miles from Rockford, the closest one on record.
The yearly running costs in Rockford
Modelled on a typical 2000-square-foot house, the heat pump draws about 5,476 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,190 a year. The gas furnace it replaces burns roughly 55 Mcf a year at $11.25 per Mcf here, for a running cost near $840 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 $10,744 behind.
The break-even point in Rockford
The heat pump would become the cheaper option in Rockford if electricity fell to 12.2¢/kWh (from 19.06¢) or gas rose above $17.61 per Mcf (from $11.25). At today's prices a cheaper quote cannot rescue the gas comparison in Rockford, since there is no yearly saving to recover it from.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Rockford, many houses run on electric heat already. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. Switching saves about $1,579 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 6.3 years.
Where Rockford ranks in this dataset
Ranked against the other 3206 cities covered, Rockford comes in at 522 for heating severity, 1 would be the coldest place in the dataset, and 189 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 if you live in Rockford
About 147,486 people live in Rockford, 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.
Reading further on this page's numbers
The methodology guide walks through exactly how Rockford's 2.44 seasonal COP and the rest of this page's numbers get built. Rockford's -11°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.