Chicago / Mount Vernon
Mount Vernon has 14,090 residents (give or take 361) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1751180, checked 2026-10-19), about 961 people per square mile.
Mount Vernon is about 252 miles from the Census center point for Chicago in a straight line and covers 14.659 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).
Of the 6,108 occupied homes in Mount Vernon, 51% heat with natural gas, 0% with heating oil, 45% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1751180, checked 2026-10-19).
Gas heats 51% of Mount Vernon against electricity at 45%, 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.
Mount Vernon has about the Jefferson County oil share of 0% and 5 points more electric heat than the county's 40% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US17081, checked 2026-10-19).
Mount Vernon has 7,131 housing units, 16% built before 1940 and 71% before 1980, with 8% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1751180, checked 2026-10-19).
Mount Vernon has 5 points more pre-1940 homes than Jefferson County as a whole (11%) and 9 points fewer homes built after 2000 than the county's 17% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US17081, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Mount Vernon home was built in 1968 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1751180, checked 2026-10-19) and the median home has 5.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1751180, checked 2026-10-19).
68% of Mount Vernon homes are single-family detached, 9% are in two- to four-unit buildings and 17% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1751180, checked 2026-10-19).
47% of Mount Vernon homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1751180, checked 2026-10-19), so beside the 68% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
47% of Mount Vernon homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1751180, checked 2026-10-19), so the market splits between resident-led jobs where the occupant picks the system and landlord-led jobs where they do not, and the rebate paperwork differs.
71% of Mount Vernon homes were built before 1980 and only 8% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1751180, 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 Mount Vernon 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 Mount Vernon address before counting it. With 45% of Mount Vernon homes already on electric heat and 53% 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 Mount Vernon is $55,357 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1751180, 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: 11F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Jefferson 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 11F figure is the Jefferson County cold-day number a Mount Vernon heat pump is sized against, so ask the installer to show the system's heating output at 11F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 51% of Mount Vernon on gas and 45% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Mount Vernon home has 5.4 rooms and was built around 1968, 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 Mount Vernon. The public number is the number the contractor quotes from.
No local contractor is named on this door for Mount Vernon yet. A request from this page goes to the first licensed shop that takes the door.