Nashville / Columbia
Columbia has 45,441 residents (give or take 42) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US4716540, checked 2026-10-19), about 1,245 people per square mile.
Columbia is about 40 miles from the Census center point for Nashville in a straight line and covers 36.495 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).
Of the 18,039 occupied homes in Columbia, 34% heat with natural gas, 0% with heating oil, 65% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US4716540, checked 2026-10-19).
Electricity already heats 65% of Columbia homes, ahead of gas at 34%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Columbia has about the Maury County oil share of 0% and 2 points less electric heat than the county's 67% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US47119, checked 2026-10-19).
Columbia has 19,918 housing units, 6% built before 1940 and 49% before 1980, with 33% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4716540, checked 2026-10-19).
The median Columbia home was built in 1981 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US4716540, checked 2026-10-19) and the median home has 5.3 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US4716540, checked 2026-10-19).
67% of Columbia homes are single-family detached, 11% are in two- to four-unit buildings and 13% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US4716540, checked 2026-10-19).
37% of Columbia homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4716540, checked 2026-10-19), so beside the 67% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
No electric utility is on file for Columbia on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Heating design temperature: 15F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Maury County row, 99% heating, PDF pages 111 to 115 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 15F figure is the Maury County cold-day number a Columbia heat pump is sized against, so ask the installer to show the system's heating output at 15F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Columbia home has 5.3 rooms and was built around 1981, 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 Columbia. The public number is the number the contractor quotes from.
No local contractor is named on this door for Columbia yet. A request from this page goes to the first licensed shop that takes the door.