Chicago / Glen Carbon
Glen Carbon has 13,977 residents (give or take 462) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1729639, checked 2026-10-19), about 1,353 people per square mile.
Glen Carbon is about 245 miles from the Census center point for Chicago in a straight line and covers 10.329 square miles of land (Census 2024 Gazetteer internal points and land area, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/, checked 2026-10-19).
The quote form takes a ZIP code; for Glen Carbon that is 62034 (Census 2020 ZCTA to county subdivision and ZCTA to place relationship files, ZIP areas at least 20% inside the town, https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_cousub20_natl.txt and https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_place20_natl.txt, checked 2026-10-19).
Of the 5,836 occupied homes in Glen Carbon, 57% heat with natural gas, 0% with heating oil, 42% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1729639, checked 2026-10-19).
Gas heats 57% of Glen Carbon against electricity at 42%, so most quotes here are a partial-home system that carries the shoulder seasons and the summer while the gas furnace handles the coldest nights, or a whole-home system when the house is ready for it.
Glen Carbon has about the Madison County oil share of 0% and 10 points more electric heat than the county's 32% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US17119, checked 2026-10-19).
Glen Carbon has 6,007 housing units, 5% built before 1940 and 34% before 1980, with 26% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1729639, checked 2026-10-19).
Glen Carbon has 10 points fewer pre-1940 homes than Madison County as a whole (15%) and 7 points more homes built after 2000 than the county's 19% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US17119, checked 2026-10-19).
The median Glen Carbon home was built in 1990 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1729639, checked 2026-10-19) and the median home has 6.2 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1729639, checked 2026-10-19).
70% of Glen Carbon homes are single-family detached, 13% are in two- to four-unit buildings and 10% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1729639, checked 2026-10-19).
With 70% detached houses and 13% in small multi-family buildings, a Glen Carbon quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 31% of Glen Carbon homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1729639, checked 2026-10-19), the landlord signs the quote in many of them.
Glen Carbon has 9 points fewer detached houses than Madison County overall (79%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US17119, checked 2026-10-19).
No electric utility is on file for Glen Carbon on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Ameren Illinois Instant Incentives (ducted ASHP), run by Ameren Illinois, is a live program for Illinois addresses and lists a standard figure of $900 (registry row 45 verified 2026-10-15, https://amerenillinoissavings.com/residential/ducted-air-source-heat-pump/, checked 2026-10-16); confirm eligibility for the Glen Carbon address before counting it. With 42% of Glen Carbon homes already on electric heat and 58% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Median household income in Glen Carbon is $97,168 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1729639, checked 2026-10-19); many state and utility heat pump rebate programs set higher incentive tiers for income-qualifying households, so the household income on the application, not the town median, decides which level applies.
Heating design temperature: 2F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Madison County row, 99% heating, PDF pages 29 to 33 of 141 (Revised 11/11/2020), https://www.energystar.gov/sites/default/files/Design%20Temperature%20Limit%20Reference%20Guide%20(2019%20Ed)%20-%20ENERGY%20STAR%20Single-Family%20New%20Homes_Rev11.pdf, fetched 2026-10-19, 99%.
That 2F figure is the Madison County cold-day number a Glen Carbon heat pump is sized against, so ask the installer to show the system's heating output at 2F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 57% of Glen Carbon on gas and 42% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Glen Carbon home has 6.2 rooms and was built around 1990, and the count of heads and the tonnage follow the rooms and the insulation, not the square footage.
The form on this page is the follow-up for Glen Carbon. The public number is the number the contractor quotes from.
No local contractor is named on this door for Glen Carbon yet. A request from this page goes to the first licensed shop that takes the door.