Chicago / Collinsville
Collinsville has 24,031 residents (give or take 38) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1715599, checked 2026-10-19), about 1,560 people per square mile.
Collinsville is about 250 miles from the Census center point for Chicago in a straight line and covers 15.407 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 Collinsville that is 62234 (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 11,061 occupied homes in Collinsville, 61% heat with natural gas, 0% with heating oil, 37% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1715599, checked 2026-10-19).
Gas heats 61% of Collinsville against electricity at 37%, 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.
Collinsville has about the Madison County oil share of 0% and 5 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).
Collinsville has 11,644 housing units, 17% built before 1940 and 61% before 1980, with 14% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1715599, checked 2026-10-19).
Collinsville has 5 points fewer 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 Collinsville home was built in 1971 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1715599, checked 2026-10-19) and the median home has 5.6 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1715599, checked 2026-10-19).
66% of Collinsville homes are single-family detached, 13% are in two- to four-unit buildings and 12% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1715599, checked 2026-10-19).
34% of Collinsville homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1715599, checked 2026-10-19), so beside the 66% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Collinsville has 13 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).
61% of Collinsville homes were built before 1980 and only 14% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1715599, checked 2026-10-19), so most of the stock predates modern insulation codes; the installer's heat-loss calculation, not a square-footage rule, decides the tonnage.
No electric utility is on file for Collinsville 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 Collinsville address before counting it. With 37% of Collinsville homes already on electric heat and 62% 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 Collinsville is $67,612 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1715599, 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 Collinsville 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 61% of Collinsville on gas and 37% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Collinsville home has 5.6 rooms and was built around 1971, 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 Collinsville. The public number is the number the contractor quotes from.
No local contractor is named on this door for Collinsville yet. A request from this page goes to the first licensed shop that takes the door.