Wilmington / Harrington
Harrington has 3,838 residents (give or take 15) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1033120, checked 2026-10-19), about 1,409 people per square mile.
Harrington is about 56 miles from the Census center point for Wilmington in a straight line and covers 2.724 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 1,718 occupied homes in Harrington, 21% heat with natural gas, 9% with heating oil, 65% with electricity and 0% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1033120, checked 2026-10-19).
Electricity already heats 65% of Harrington homes, ahead of gas at 21%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Harrington has about the Kent County oil share of 10% and 31 points more electric heat than the county's 34% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US10001, checked 2026-10-19).
Harrington has 1,760 housing units, 29% built before 1940 and 56% before 1980, with 22% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1033120, checked 2026-10-19).
Harrington has 22 points more pre-1940 homes than Kent County as a whole (7%) and 18 points fewer homes built after 2000 than the county's 40% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US10001, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Harrington home was built in 1967 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1033120, checked 2026-10-19) and the median home has 6.1 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1033120, checked 2026-10-19).
73% of Harrington homes are single-family detached, 6% are in two- to four-unit buildings and 20% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1033120, checked 2026-10-19).
With 73% detached houses and 6% in small multi-family buildings, a Harrington quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 35% of Harrington homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1033120, checked 2026-10-19), the landlord signs the quote in many of them.
Harrington has 8 points more detached houses than Kent County overall (65%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US10001, checked 2026-10-19).
No electric utility is on file for Harrington on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Median household income in Harrington is $72,679 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1033120, 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), Kent County row, 99% heating, PDF page 17 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 Kent County cold-day number a Harrington 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 for the heat-loss calculation room by room; the median Harrington home has 6.1 rooms and was built around 1967, 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 Harrington. The public number is the number the contractor quotes from.
No local contractor is named on this door for Harrington yet. A request from this page goes to the first licensed shop that takes the door.