Nashville / Signal Mountain
Signal Mountain has 8,860 residents (give or take 34) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US4768540, checked 2026-10-19), about 1,059 people per square mile.
Signal Mountain is about 108 miles from the Census center point for Nashville in a straight line and covers 8.37 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 3,351 occupied homes in Signal Mountain, 67% heat with natural gas, 0% with heating oil, 31% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US4768540, checked 2026-10-19).
Gas heats 67% of Signal Mountain against electricity at 31%, so most quotes here are a partial-home system that carries the shoulder seasons and the summer while the gas boiler stays for the deepest cold, or a whole-home system when the house is ready for it.
Signal Mountain has about the Hamilton County oil share of 0% and 37 points less electric heat than the county's 68% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US47065, checked 2026-10-19).
Signal Mountain has 3,429 housing units, 6% built before 1940 and 54% before 1980, with 14% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4768540, checked 2026-10-19).
The median Signal Mountain home was built in 1977 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US4768540, checked 2026-10-19) and the median home has 8.2 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US4768540, checked 2026-10-19).
90% of Signal Mountain homes are single-family detached, 1% are in two- to four-unit buildings and 8% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US4768540, checked 2026-10-19).
With 90% detached houses and 1% in small multi-family buildings, a Signal Mountain quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 12% of Signal Mountain homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4768540, checked 2026-10-19), the landlord signs the quote in many of them.
No electric utility is on file for Signal Mountain on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Heating design temperature: 18F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Hamilton 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 18F figure is the Hamilton County cold-day number a Signal Mountain heat pump is sized against, so ask the installer to show the system's heating output at 18F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 67% of Signal Mountain 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; the median Signal Mountain home has 8.2 rooms and was built around 1977, 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 Signal Mountain. The public number is the number the contractor quotes from.
No local contractor is named on this door for Signal Mountain yet. A request from this page goes to the first licensed shop that takes the door.