Is a heat pump worth it in Libertyville?

Here in Libertyville, the honest answer is that a heat pump raises your annual running cost. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). The heat pump would cost about $269 more a year to run than the furnace it replaces — a premium with no payback. That's Libertyville's own climate and rates talking, not a hedge or a caveat.

Libertyville's weather, in the numbers that matter

5324 heating degree days pile up here every year, so Libertyville has a cold winter that leans hard on heating equipment; the cooling side runs to 777 cooling degree days, where summers add a moderate cooling load. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is -0.9°F, against a record low of -11°F. That puts the seasonal coefficient of performance at 2.68 for the recommended cold-climate unit. Libertyville 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, WAUKEGAN REGIONAL AIRPORT, 10.5 miles from Libertyville.

The month-to-month numbers for Libertyville

Modelled on a typical 2000-square-foot house, the heat pump draws about 5,030 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,085 a year. The gas furnace it replaces burns roughly 55 Mcf a year at 11.25 per Mcf here, for a running cost near $816 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 $7,540 behind.

If your home heats with electric baseboard instead of gas

Gas isn't universal in Libertyville — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $1,676 a year, which recovers the extra $8,000 spent going electric in roughly 4.8 years.

Where Libertyville ranks in this dataset

Ranked against the other 3206 cities covered, Libertyville comes in at 468 for heating severity — 1 would be the coldest place in the dataset — and 1875 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.

Deciding what's next in Libertyville, IL

Libertyville, Illinois is home to about 20,643 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 Libertyville, nothing is lost by holding off until the current equipment genuinely fails.

Ask a local HVAC contractor for a quote before committing either way.

Where Libertyville's figure comes from

Nothing above is a black box: the methodology guide shows the full arithmetic behind Libertyville's 2.68 seasonal COP and payback figure. Libertyville's -0.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.