Baltimore / Baltimore
Baltimore has 573,243 residents (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2404000, checked 2026-10-19), about 7,082 people per square mile.
Baltimore is the city this door is named for; it covers 80.946 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 Baltimore that is 21201, 21202, 21205, 21206, 21207, 21209, 21210, 21211 and 18 more (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 Baltimore is $62,177 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2404000, 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.
7,082 people per square mile puts Baltimore in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
15% of Baltimore homes are single-family detached, 10% are in two- to four-unit buildings and 25% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2404000, checked 2026-10-19).
52% of Baltimore homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2404000, checked 2026-10-19), so beside the 15% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
52% of Baltimore homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2404000, 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 255,668 occupied homes in Baltimore, 62% heat with natural gas, 3% with heating oil, 31% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2404000, checked 2026-10-19).
Gas heats 62% of Baltimore against electricity at 31%, 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.
Baltimore has about the Baltimore city oil share of 3% and the same 31% electric share (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US24510, checked 2026-10-19).
No electric utility is on file for Baltimore on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Baltimore has 295,032 housing units, 41% built before 1940 and 82% before 1980, with 9% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2404000, checked 2026-10-19).
Baltimore tracks Baltimore city on housing age, with the county at 41% pre-1940 and 9% post-2000 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US24510, checked 2026-10-19).
The median Baltimore home was built in 1947 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2404000, checked 2026-10-19) and the median home has 5.5 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2404000, checked 2026-10-19).
41% of Baltimore homes were built before 1940 and 82% before 1980 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2404000, checked 2026-10-19), so insulation is the first sizing question: an older home leaks more heat per square foot, and the installer runs a room-by-room heat-loss calculation to size the system for what the walls and windows actually hold in, not just the floor plan.
Heating design temperature: 17F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Baltimore city row, 99% heating, PDF pages 55 to 56 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 17F figure is the Baltimore city cold-day number a Baltimore heat pump is sized against, so ask the installer to show the system's heating output at 17F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 62% of Baltimore on gas and 31% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Baltimore house from before 1940 (41% of the 295,032 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Baltimore. The public number is the number the contractor quotes from.
No local contractor is named on this door for Baltimore yet. A request from this page goes to the first licensed shop that takes the door.