Godfrey, IL: the heat pump payback math
Godfrey is a place where a heat pump genuinely costs more to operate than the alternative. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Unfortunately the electric bill outweighs the gas bill it replaces by about $129 a year here, so the extra spend stays unrecovered. There's no spin on that: Godfrey's numbers say wait.
The climate behind Godfrey's payback figure
Degree days tell the story here: Godfrey racks up 4026 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1319 cooling degree days on the cooling side. 1.2°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -7.6°F on file. Worked through the model, that's a seasonal COP of 2.73 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Godfrey sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from ST LOUIS REGIONAL AIRPORT, the closest NOAA station, 10.5 miles out.
The month-to-month numbers for Godfrey
Modelled on a typical 2000-square-foot house, the heat pump draws about 3,734 kWh a year to keep it warm, plus cooling, for a combined electric bill near $926 a year. Godfrey's gas rate of 11.25 per Mcf, applied to the 42 Mcf a year the furnace burns, puts its running cost near $798 a year, against 19.06¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs past the 15-year equipment life, for a 15-year net position $5,429 behind.
The other scenario: no gas furnace to begin with
Not every home in Godfrey has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $1,343 a year comes back this way, enough that the 6-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Godfrey ranks in this dataset
Among 3206 cities, Godfrey's winter puts it at rank 1489 for severity, while its size puts it at rank 2128 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 Godfrey, IL
About 17,610 people live in Godfrey, 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
Nothing above is a black box: the methodology guide shows the full arithmetic behind Godfrey's 2.73 seasonal COP and payback figure. Godfrey's 1.2°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.