Hartford is a renter city of multi-family buildings on gas and electric heat: of its 56,435 housing units, 44% are in buildings of five or more units, 35% in two- to four-unit buildings and 17% single-family detached (Census ACS 2020-2024, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US0937000, checked 2026-10-19), 40% of them were built before 1940, 80% before 1980 and only 7% in 2000 or later (Census ACS 2020-2024, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US0937000, checked 2026-10-19), and of the 49,028 occupied homes natural gas heats 64%, electricity 24%, heating oil 8% and propane 2% (Census ACS 2020-2024, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US0937000, checked 2026-10-19). That electric share is the number that sets this door apart from the other New England city doors: nearly one in four Hartford homes is on resistance heat already, and for those homes a heat pump is a one-for-one swap of the most expensive heat in the house with no boiler left to negotiate with, while the two- and three-family blocks of Frog Hollow, Parkville and the South End on gas boilers get the per-floor outdoor unit and the condo or landlord sign-off before the quote. The age of the stock sets the order of work: with 40% of units from before 1940 and 7% new enough to clear a weatherization check on age (Census ACS 2020-2024, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US0937000, checked 2026-10-19), the audit comes first on most Hartford jobs, and the installer sizes the system room by room against the drafty envelope the audit documents rather than the square footage on the listing. Cross the city line and the housing turns over: West Hartford is 63% detached houses with oil in 19% of its 25,885 occupied homes, and Wethersfield 73% detached with oil at 20% (Census ACS 2020-2024, tables B25024 and B25040, Capitol Planning Region rows, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US0911082590, checked 2026-10-19), Bloomfield carries the highest oil share on the inner ring at 27% of occupied homes, with 18% electric and only 7% of units from before 1940 (Census ACS 2020-2024, tables B25040 and B25034, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US0911005910, checked 2026-10-19), East Hartford pairs 22% oil with 20% electric across 20,351 occupied homes (Census ACS 2020-2024, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US0911022630, checked 2026-10-19), and New Britain is the other multi-family city on the carve, 35% of its 32,065 units in two- to four-family buildings (Census ACS 2020-2024, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US0911050440, checked 2026-10-19). An oil ranch in Bloomfield and an electric-baseboard walk-up in the city are two different jobs with two different rebate questions, and the quote form on this door asks for the street address first so the answer fits the house.
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