Baltimore / Bel Air South
Bel Air South has 58,137 residents (give or take 2,052) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2405950, checked 2026-10-19), about 2,733 people per square mile.
Bel Air South is about 22 miles from the Census center point for Baltimore in a straight line and covers 21.27 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 Bel Air South that is 21009, 21014, 21015 (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 22,348 occupied homes in Bel Air South, 48% heat with natural gas, 2% with heating oil, 48% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2405950, checked 2026-10-19).
Gas heats 48% of Bel Air South against electricity at 48%, 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.
Bel Air South has 8 points less oil heat than Harford County as a whole, where 10% of homes burn oil, and 6 points more electric heat than the county's 42% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US24025, checked 2026-10-19).
Bel Air South has 22,921 housing units, 1% built before 1940 and 22% before 1980, with 28% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2405950, checked 2026-10-19).
Bel Air South has 3 points fewer pre-1940 homes than Harford County as a whole (4%) and 3 points more homes built after 2000 than the county's 25% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US24025, checked 2026-10-19).
The median Bel Air South home was built in 1991 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2405950, checked 2026-10-19) and the median home has 7.2 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2405950, checked 2026-10-19).
50% of Bel Air South homes are single-family detached, 0% are in two- to four-unit buildings and 19% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2405950, checked 2026-10-19).
18% of Bel Air South homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2405950, checked 2026-10-19), so beside the 50% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Bel Air South has 10 points fewer detached houses than Harford County overall (60%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US24025, checked 2026-10-19).
No electric utility is on file for Bel Air South 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 Bel Air South is $123,653 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2405950, 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: 8F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Harford County 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 8F figure is the Harford County cold-day number a Bel Air South heat pump is sized against, so ask the installer to show the system's heating output at 8F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 48% of Bel Air South on gas and 48% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Bel Air South home has 7.2 rooms and was built around 1991, 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 Bel Air South. The public number is the number the contractor quotes from.
No local contractor is named on this door for Bel Air South yet. A request from this page goes to the first licensed shop that takes the door.