Hartford / Berlin
Berlin is about 12 miles from the Census center point for Hartford in a straight line and covers 26.312 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).
Berlin has 20,361 residents (give or take 54) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US0911004300, checked 2026-10-19), about 774 people per square mile.
The quote form takes a ZIP code; for Berlin that is 06023, 06037 (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 8,388 occupied homes in Berlin, 59% heat with natural gas, 29% with heating oil, 7% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US0911004300, checked 2026-10-19).
Berlin has about the Capitol Planning Region oil share of 31% and 9 points less electric heat than the county's 16% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US09110, checked 2026-10-19).
Gas leads in Berlin at 59%, but 32% of homes still burn delivered oil or propane, and those 2,684 or so homes are where a heat pump pays back fastest.
The median Berlin home was built in 1972 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US0911004300, checked 2026-10-19) and the median home has 6.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US0911004300, checked 2026-10-19).
Berlin has 8,629 housing units, 11% built before 1940 and 62% before 1980, with 14% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US0911004300, checked 2026-10-19).
Berlin has 7 points fewer pre-1940 homes than Capitol Planning Region as a whole (18%) and 3 points more homes built after 2000 than the county's 11% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US09110, checked 2026-10-19).
62% of Berlin 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=060XX00US0911004300, 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.
79% of Berlin homes are single-family detached, 10% are in two- to four-unit buildings and 8% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US0911004300, checked 2026-10-19).
With 79% detached houses and 10% in small multi-family buildings, a Berlin quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 17% of Berlin homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US0911004300, checked 2026-10-19), the landlord signs the quote in many of them.
Berlin has 22 points more detached houses than Capitol Planning Region overall (57%) and 13 points fewer five-plus-unit buildings than the county's 21% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US09110, checked 2026-10-19).
No electric utility is on file for Berlin on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Energize CT residential heat pump rebate, run by Energize CT, is a live program for Connecticut addresses and publishes its terms without one headline figure (registry row 3 verified 2026-10-15, https://www.energizect.com/node/68091, checked 2026-10-16); confirm eligibility for the Berlin address before counting it. With 7% of Berlin homes already on electric heat and 91% 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 Berlin is $113,598 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US0911004300, 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: 0F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Hartford 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; town filed under Hartford County by Census Bureau, Connecticut county to county subdivision crosswalk (legacy county for each 2022 planning region town), https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.txt, fetched 2026-10-19, 99%.
That 0F figure is the Hartford County cold-day number a Berlin heat pump is sized against, so ask the installer to show the system's heating output at 0F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 59% of Berlin on gas and 7% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Berlin home has 6.4 rooms and was built around 1972, 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 Berlin. The public number is the number the contractor quotes from.
No local contractor is named on this door for Berlin yet. A request from this page goes to the first licensed shop that takes the door.