Should Chatham switch to a heat pump?
Chatham 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. Running costs here land $195 a year HIGHER than the furnace it replaces, so that premium is never recovered. There's no spin on that: Chatham's numbers say wait.
The climate behind Chatham's payback figure
Chatham has a real but manageable winter — 4395 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1250 cooling degree days. Sizing runs off the design temperature, not the average day: -4°F here (record low -11.9°F), which works out to a seasonal COP of 2.6 for the cold-climate class of unit this climate calls for. A cold-climate unit is the right call in Chatham — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, ABRAHAM LINCOLN CAPITAL AIRPO, 11.8 miles from Chatham.
The month-to-month numbers for Chatham
A 2000-square-foot house here would pull roughly 4,280 heating kilowatt-hours annually on top of cooling, totalling about $1,019 a year on electricity. That compares with roughly 46 Mcf a year of gas at Chatham's 11.25 per-Mcf rate — about $824 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 $6,429 behind.
If your home heats with electric baseboard instead of gas
Plenty of homes in Chatham 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. About $1,411 a year comes back this way, enough that the 5.7-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Chatham ranks in this dataset
Among 3206 cities, Chatham's winter puts it at rank 1232 for severity, while its size puts it at rank 2429 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 Chatham, IL
About 14,639 people live in Chatham, 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.
Ask a local HVAC contractor for a quote before committing either way.
More on how this number was built
Every constant behind this page — the 2.6 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. At a -4°F design temperature, Chatham sits in cold-climate territory; the guide to that class of unit explains why.