Charleston / Sumter
Sumter has 43,053 residents (give or take 52) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US4570405, checked 2026-10-19), about 1,299 people per square mile.
Sumter is about 81 miles from the Census center point for Charleston in a straight line and covers 33.132 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 Sumter that is 29150, 29152 (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 16,081 occupied homes in Sumter, 15% heat with natural gas, 1% with heating oil, 81% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US4570405, checked 2026-10-19).
Electricity already heats 81% of Sumter homes, ahead of gas at 15%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Sumter has about the Sumter County oil share of 1% and 4 points less electric heat than the county's 85% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US45085, checked 2026-10-19).
Sumter has 18,739 housing units, 5% built before 1940 and 42% before 1980, with 29% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4570405, checked 2026-10-19).
Sumter tracks Sumter County on housing age, with the county at 3% pre-1940 and 27% post-2000 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US45085, checked 2026-10-19).
The median Sumter home was built in 1986 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US4570405, checked 2026-10-19) and the median home has 5.6 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US4570405, checked 2026-10-19).
65% of Sumter homes are single-family detached, 8% are in two- to four-unit buildings and 16% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US4570405, checked 2026-10-19).
43% of Sumter homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4570405, checked 2026-10-19), so beside the 65% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
43% of Sumter homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4570405, 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 Sumter 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 Sumter is $55,592 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US4570405, 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: 27F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Sumter County row, 99% heating, PDF pages 105 to 107 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 27F figure is the Sumter County cold-day number a Sumter heat pump is sized against, so ask the installer to show the system's heating output at 27F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Sumter home has 5.6 rooms and was built around 1986, 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 Sumter. The public number is the number the contractor quotes from.
No local contractor is named on this door for Sumter yet. A request from this page goes to the first licensed shop that takes the door.