Is a heat pump worth it in Cary?
In Cary, a heat pump would cost more to run each year than what you have now. $3,500 is what Cary 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. Unfortunately the electric bill outweighs the gas bill it replaces by about $228 a year here, so the extra spend stays unrecovered. That's Cary's own climate and rates talking, not a hedge or a caveat.
Cary's weather, in the numbers that matter
Degree days tell the story here: Cary racks up 4991 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1020 cooling degree days on the cooling side. -0.9°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -11°F on file. Worked through the model, that's a seasonal COP of 2.68 on the cold-climate unit fit for this climate. Cary 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 ARPT, the closest NOAA station, 18.7 miles out.
Cary's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 4,716 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,065 a year. That compares with roughly 52 Mcf a year of gas at Cary's 11.25 per-Mcf rate — about $837 a year — against a local electricity rate of 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 $6,917 behind.
Electric resistance heat in Cary, compared
Plenty of homes in Cary 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. The saving here runs about $1,596 a year, which recovers the extra $8,000 spent going electric in roughly 5 years.
Cary against the rest of the country
Among 3206 cities, Cary's winter puts it at rank 729 for severity, while its size puts it at rank 2095 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 Cary
Cary, Illinois is home to about 18,031 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 Cary, 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
Nothing above is a black box: the methodology guide shows the full arithmetic behind Cary's 2.68 seasonal COP and payback figure. Cary's -0.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.