Mattoon, IL: the heat pump payback math
In Mattoon, a heat pump would cost more to run each year than what you have now. $3,500 is what Mattoon would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Running costs here land $150 a year HIGHER than the furnace it replaces, so that premium is never recovered. There's no spin on that: Mattoon's numbers say wait.
Why Mattoon's climate drives this number
4270 heating degree days pile up here every year, so Mattoon has a real but manageable winter; the cooling side runs to 1103 cooling degree days, where summers are hot enough that cooling matters as much as heating. 3°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -5.1°F on file. Worked through the model, that's a seasonal COP of 2.77 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Mattoon sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station COLES COUNTY MEMO AIRPORT, 4.4 miles from Mattoon — the closest one on record.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 3,903 kWh a year to keep it warm, plus cooling, for a combined electric bill near $923 a year. The gas furnace it replaces burns roughly 44 Mcf a year at 11.25 per Mcf here, for a running cost near $773 a year (electricity here runs 19.06¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $5,757 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Mattoon — many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $1,410 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 5.7 years.
Where Mattoon ranks in this dataset
Among 3206 cities, Mattoon's winter puts it at rank 1356 for severity, while its size puts it at rank 2232 for population — 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
Deciding what's next in Mattoon, IL
About 16,602 people live in Mattoon, 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.
Ask a local HVAC contractor for a quote before committing either way.
Where Mattoon's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Mattoon's 2.77 seasonal COP and payback figure. At a 3°F design temperature, Mattoon sits in cold-climate territory; the guide to that class of unit explains why.