Des Moines / Coralville
Coralville has 23,234 residents (give or take 34) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1916230, checked 2026-10-19), about 1,834 people per square mile.
Coralville is about 104 miles from the Census center point for Des Moines in a straight line and covers 12.668 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 Coralville that is 52241 (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).
Median household income in Coralville is $69,144 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1916230, 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.
37% of Coralville homes are single-family detached, 8% are in two- to four-unit buildings and 39% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1916230, checked 2026-10-19).
44% of Coralville homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1916230, checked 2026-10-19), so beside the 37% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Coralville has 11 points fewer detached houses than Johnson County overall (48%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US19103, checked 2026-10-19).
44% of Coralville homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1916230, 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.
Of the 9,985 occupied homes in Coralville, 68% heat with natural gas, 0% with heating oil, 28% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1916230, checked 2026-10-19).
Gas heats 68% of Coralville against electricity at 28%, 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.
Coralville has about the Johnson County oil share of 0% and the same 28% electric share (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US19103, checked 2026-10-19).
MidAmerican Energy lists Coralville among the Iowa communities it serves for electricity (MidAmerican Energy community list, electric communities, https://www.midamericanenergy.com/territory-communitylist, checked 2026-10-19).
MidAmerican 2026 Instant Discount air source heat pump, run by MidAmerican Energy, is a live program for Iowa addresses and covers qualifying equipment at $1,200 per system (registry row 31 verified 2026-10-14, https://www.midamericanenergy.com/home-discounts-and-rebates, checked 2026-10-16); confirm eligibility for the Coralville address before counting it. With 28% of Coralville homes already on electric heat and 71% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Coralville has 10,586 housing units, 2% built before 1940 and 28% before 1980, with 40% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1916230, checked 2026-10-19).
Coralville has 7 points fewer pre-1940 homes than Johnson County as a whole (9%) and 3 points more homes built after 2000 than the county's 37% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US19103, checked 2026-10-19).
The median Coralville home was built in 1995 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1916230, checked 2026-10-19) and the median home has 4.9 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1916230, checked 2026-10-19).
40% of Coralville housing was built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1916230, 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.
Heating design temperature: -6F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Johnson County row, 99% heating, PDF pages 37 to 41 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 -6F figure is the Johnson County cold-day number a Coralville heat pump is sized against, so ask the installer to show the system's heating output at -6F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 68% of Coralville on gas and 28% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Coralville home has 4.9 rooms and was built around 1995, 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 Coralville. The public number is the number the contractor quotes from.
No local contractor is named on this door for Coralville yet. A request from this page goes to the first licensed shop that takes the door.