Should Norridge switch to a heat pump?
In Norridge, a heat pump would cost more to run each year than what you have now. $3,500 is what Norridge 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. The heat pump would cost about $240 more a year to run than the furnace it replaces — a premium with no payback. There's no spin on that: Norridge's numbers say wait.
The climate behind Norridge's payback figure
4837 heating degree days pile up here every year, so Norridge has a real but manageable winter; the cooling side runs to 1162 cooling degree days, where summers are hot enough that cooling matters as much as heating. Sizing runs off the design temperature, not the average day: -5.1°F here (record low -9.9°F), which works out to a seasonal COP of 2.58 for the cold-climate class of unit this climate calls for. Norridge 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. Climate figures trace to the nearest NOAA station, CHICAGO O'HARE INTERNATIONAL, 5.6 miles from Norridge.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 4,747 heating kilowatt-hours annually on top of cooling, totalling about $1,094 a year on electricity. Norridge's gas rate of 11.25 per Mcf, applied to the 50 Mcf a year the furnace burns, puts its running cost near $854 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 $7,099 behind.
The other scenario: no gas furnace to begin with
Plenty of homes in Norridge heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Norridge's answer improves. About $1,528 a year comes back this way, enough that the 5.2-year payback clears the $8,000 premium comfortably within the equipment's life.
Norridge against the rest of the country
Among 3206 cities, Norridge's winter puts it at rank 924 for severity, while its size puts it at rank 2412 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 Norridge
About 14,817 people live in Norridge, 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.
Get quotes from local HVAC contractors before deciding.
Where Norridge's figure comes from
The methodology guide walks through exactly how Norridge's 2.58 seasonal COP and the rest of this page's numbers get built. Norridge's -5.1°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here — see what that changes in the cold-climate unit guide.