Hartford / Durham
Durham has 7,208 residents (give or take 31) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US0913020810, checked 2026-10-19), about 305 people per square mile.
Durham is about 21 miles from the Census center point for Hartford in a straight line and covers 23.659 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).
The quote form takes a ZIP code; for Durham that is 06422 (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).
Durham is spread out at 305 people per square mile across 23.659 square miles of land, so a long refrigerant line run between the outdoor unit and the farthest indoor head is the sizing question an installer checks first.
Of the 2,986 occupied homes in Durham, 1% heat with natural gas, 78% with heating oil, 10% with electricity and 6% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US0913020810, checked 2026-10-19).
Heating oil is the largest single fuel in Durham at 78%, ahead of electricity at 10%, so the usual job here is an oil boiler or furnace coming out and a cold-climate heat pump going in, with the oil tank removed.
Durham has 26 points more oil heat than Lower Connecticut River Valley Planning Region as a whole, where 52% of homes burn oil, and 9 points less electric heat than the county's 19% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US09130, checked 2026-10-19).
Durham has 3,022 housing units, 8% built before 1940 and 59% before 1980, with 10% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US0913020810, checked 2026-10-19).
Durham has 11 points fewer pre-1940 homes than Lower Connecticut River Valley Planning Region as a whole (19%) and 4 points fewer homes built after 2000 than the county's 14% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US09130, checked 2026-10-19).
The median Durham home was built in 1976 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US0913020810, checked 2026-10-19) and the median home has 6.9 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US0913020810, checked 2026-10-19).
95% of Durham homes are single-family detached, 4% are in two- to four-unit buildings and 0% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US0913020810, checked 2026-10-19).
With 95% detached houses and 4% in small multi-family buildings, a Durham quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 7% of Durham homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US0913020810, checked 2026-10-19), the landlord signs the quote in many of them.
Durham has 23 points more detached houses than Lower Connecticut River Valley Planning Region overall (72%) and 13 points fewer five-plus-unit buildings than the county's 13% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US09130, checked 2026-10-19).
Only 7% of Durham homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US0913020810, checked 2026-10-19), so nearly every quote here is the resident talking to the installer directly, and the rebate goes to the person living in the house.
No electric utility is on file for Durham 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 Durham address before counting it. With 10% of Durham homes already on electric heat and 85% 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 Durham is $158,857 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US0913020810, 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: 2F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Middlesex 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 Middlesex 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 2F figure is the Middlesex County cold-day number a Durham heat pump is sized against, so ask the installer to show the system's heating output at 2F, not at the milder rating-label temperature.
Ask what happens to the oil tank, since 78% of the 2,986 occupied Durham homes have one and removal is usually a separate line on the quote.
Ask for the heat-loss calculation room by room; the median Durham home has 6.9 rooms and was built around 1976, 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 Durham. The public number is the number the contractor quotes from.
No local contractor is named on this door for Durham yet. A request from this page goes to the first licensed shop that takes the door.