Heat pump vs. gas furnace in Glendale Heights, IL
Glendale Heights is a place where a heat pump genuinely costs more to operate than the alternative. $3,500 is what Glendale Heights 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 $240 a year here, so the extra spend stays unrecovered. That's Glendale Heights's own climate and rates talking, not a hedge or a caveat.
Glendale Heights's weather, in the numbers that matter
Glendale Heights has a real but manageable winter — 4837 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1162 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is -5.1°F, against a record low of -9.9°F. That puts the seasonal coefficient of performance at 2.58 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Glendale Heights sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station CHICAGO O'HARE INTERNATIONAL, 8 miles from Glendale Heights — the closest one on record.
Glendale Heights's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 4,747 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,094 a year. Glendale Heights'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. Buy it outright, not incrementally, and payback stretches to beyond the 15-year equipment life; over 15 years the net position sits $7,099 behind.
The other scenario: no gas furnace to begin with
Plenty of homes in Glendale Heights 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 $1,528 a year, which recovers the extra $8,000 spent going electric in roughly 5.2 years.
Where Glendale Heights ranks in this dataset
Among 3206 cities, Glendale Heights's winter puts it at rank 910 for severity, while its size puts it at rank 1252 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 Glendale Heights
Glendale Heights, Illinois is home to about 32,866 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 Glendale Heights, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
Every constant behind this page — the 2.58 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. At a -5.1°F design temperature, Glendale Heights sits in cold-climate territory; the guide to that class of unit explains why.