Chicago / Round Lake
Round Lake has 18,628 residents (give or take 37) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1766027, checked 2026-10-19), about 3,350 people per square mile.
Round Lake is about 41 miles from the Census center point for Chicago in a straight line and covers 5.56 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 Round Lake that is 60073 (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).
3,350 people per square mile puts Round Lake in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
Of the 6,430 occupied homes in Round Lake, 92% heat with natural gas, 0% with heating oil, 6% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1766027, checked 2026-10-19).
Gas heats 92% of Round Lake against electricity at 6%, 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.
Round Lake has about the Lake County oil share of 0% and 9 points less electric heat than the county's 15% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US17097, checked 2026-10-19).
Round Lake has 6,627 housing units, 1% built before 1940 and 14% before 1980, with 68% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1766027, checked 2026-10-19).
Round Lake has 7 points fewer pre-1940 homes than Lake County as a whole (8%) and 48 points more homes built after 2000 than the county's 20% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US17097, checked 2026-10-19).
The median Round Lake home was built in 2003 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1766027, checked 2026-10-19) and the median home has 6 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1766027, checked 2026-10-19).
55% of Round Lake homes are single-family detached, 2% 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=160XX00US1766027, checked 2026-10-19).
23% of Round Lake homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1766027, checked 2026-10-19), so beside the 55% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Round Lake has 12 points fewer detached houses than Lake County overall (67%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US17097, checked 2026-10-19).
68% of Round Lake housing was built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1766027, checked 2026-10-19), and homes that recent usually meet the insulation codes in place at the time, so a heat pump sized to the floor plan lands closer to the real load than it would in an older neighborhood.
No electric utility is on file for Round Lake 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 Round Lake address before counting it. With 6% of Round Lake homes already on electric heat and 93% 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 Round Lake is $111,977 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1766027, 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: -3F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Lake 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 -3F figure is the Lake County cold-day number a Round Lake heat pump is sized against, so ask the installer to show the system's heating output at -3F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 92% of Round Lake on gas and 6% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Round Lake home has 6 rooms and was built around 2003, 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 Round Lake. The public number is the number the contractor quotes from.
No local contractor is named on this door for Round Lake yet. A request from this page goes to the first licensed shop that takes the door.