Heat Pump Payback in Vernon Hills, IL
Is a heat pump worth it in Vernon Hills?
Here in Vernon Hills, 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 $228 a year higher than the furnace it replaces, so that premium is never recovered. That's Vernon Hills's own climate and rates talking, not a hedge or a caveat.
Checking a different city
Vernon Hills is one of 3206 cities covered here, each run through the same model. Search another below.
Vernon Hills's weather, in the numbers that matter
Vernon Hills has a real but manageable winter, 4991 heating degree days a year against a 65°F base, and summers are hot enough that cooling matters as much as heating, at 1020 cooling degree days. 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. Vernon Hills 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. These numbers come from Palwaukee Municipal Airport, the closest NOAA station, 8.3 miles out.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 4,716 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,065 a year. The gas furnace it replaces burns roughly 52 Mcf a year at $11.25 per Mcf here, for a running cost near $837 a year including the old AC (electricity here runs 19.06¢/kWh). Because the heat pump costs more to run here, the gap only widens with time: $8,917 behind after 15 years compared with replacing the furnace and AC like-for-like.
What would change Vernon Hills's answer
For the verdict in Vernon Hills to flip, electricity would need to drop to about 13.7¢/kWh from 19.06¢, or gas climb past $15.63 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 Vernon Hills; the case for one here rests on comfort, cooling, or replacing electric heat instead.
Electric resistance heat in Vernon Hills, compared
Plenty of homes in Vernon Hills 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 $1,596 a year comes back this way, enough that the 6.3-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Vernon Hills ranks in this dataset
Vernon Hills lands at position 722 out of 3206 cities on heating severity (coldest is 1), and 1476 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.
Deciding what's next in Vernon Hills, IL
Vernon Hills, Illinois is home to about 27,002 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 Vernon Hills, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
The methodology guide walks through exactly how Vernon Hills's 2.68 seasonal COP and the rest of this page's numbers get built. At a -0.9°F design temperature, Vernon Hills sits in cold-climate territory; the guide to that class of unit explains why.