Harrisburg / Hummelstown
Hummelstown is about 9 miles from the Census center point for Harrisburg in a straight line and covers 1.242 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).
Hummelstown has 4,527 residents (give or take 43) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US4236232, checked 2026-10-19), about 3,645 people per square mile.
3,645 people per square mile puts Hummelstown in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
Of the 2,288 occupied homes in Hummelstown, 36% heat with natural gas, 26% with heating oil, 36% with electricity and 0% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US4236232, checked 2026-10-19).
Hummelstown has 11 points more oil heat than Dauphin County as a whole, where 15% of homes burn oil, and 2 points less electric heat than the county's 38% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US42043, checked 2026-10-19).
Gas leads in Hummelstown at 36%, but 26% of homes still burn delivered oil or propane, and those 595 or so homes are where a heat pump pays back fastest.
The median Hummelstown home was built in 1965 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US4236232, checked 2026-10-19) and the median home has 5.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US4236232, checked 2026-10-19).
Hummelstown has 2,308 housing units, 17% built before 1940 and 69% before 1980, with 17% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4236232, checked 2026-10-19).
Hummelstown tracks Dauphin County on housing age, with the county at 19% pre-1940 and 17% post-2000 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US42043, checked 2026-10-19).
69% of Hummelstown homes were built before 1980 and only 17% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4236232, 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.
56% of Hummelstown homes are single-family detached, 5% are in two- to four-unit buildings and 32% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US4236232, checked 2026-10-19).
46% of Hummelstown homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4236232, checked 2026-10-19), so beside the 56% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Hummelstown has 6 points more detached houses than Dauphin County overall (50%) and 15 points more five-plus-unit buildings than the county's 17% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US42043, checked 2026-10-19).
46% of Hummelstown homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4236232, 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.
No electric utility is on file for Hummelstown 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 Hummelstown is $63,175 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US4236232, 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: 7F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Dauphin County row, 99% heating, PDF pages 102 to 105 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 7F figure is the Dauphin County cold-day number a Hummelstown heat pump is sized against, so ask the installer to show the system's heating output at 7F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 36% of Hummelstown on gas and 36% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Hummelstown home has 5.4 rooms and was built around 1965, 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 Hummelstown. The public number is the number the contractor quotes from.
No local contractor is named on this door for Hummelstown yet. A request from this page goes to the first licensed shop that takes the door.