Jacksonville / Keystone Heights
Keystone Heights has 1,576 residents (give or take 357) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1236475, checked 2026-10-19), about 1,466 people per square mile.
Keystone Heights is about 44 miles from the Census center point for Jacksonville in a straight line and covers 1.075 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 586 occupied homes in Keystone Heights, 2% heat with natural gas, 0% with heating oil, 92% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1236475, checked 2026-10-19).
Electricity already heats 92% of Keystone Heights homes, ahead of propane at 3%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Keystone Heights has about the Clay County oil share of 0% and 3 points less electric heat than the county's 95% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US12019, checked 2026-10-19).
Keystone Heights has 666 housing units, 4% built before 1940 and 65% before 1980, with 11% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1236475, checked 2026-10-19).
Keystone Heights has 3 points more pre-1940 homes than Clay County as a whole (1%) and 31 points fewer homes built after 2000 than the county's 42% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US12019, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Keystone Heights home was built in 1971 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1236475, checked 2026-10-19) and the median home has 6.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1236475, checked 2026-10-19).
95% of Keystone Heights homes are single-family detached, 0% are in two- to four-unit buildings and 0% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1236475, checked 2026-10-19).
With 95% detached houses and 0% in small multi-family buildings, a Keystone Heights quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 19% of Keystone Heights homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1236475, checked 2026-10-19), the landlord signs the quote in many of them.
Keystone Heights has 21 points more detached houses than Clay County overall (74%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US12019, checked 2026-10-19).
65% of Keystone Heights homes were built before 1980 and only 11% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1236475, 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.
No electric utility is on file for Keystone Heights on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Florida utility heat pump rebates (Orlando, Tampa), run by OUC / Duke Energy Florida / TECO, is a live program for Florida addresses and covers qualifying equipment at $1,150 per system (registry row 26 verified 2026-10-15, https://www.ouc.com/solutions-programs/savings/rebates/heat-pump-ac/, checked 2026-10-16); confirm eligibility for the Keystone Heights address before counting it. With 92% of Keystone Heights homes already on electric heat and 5% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Median household income in Keystone Heights is $80,217 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1236475, 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: 32F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Clay County row, 99% heating, PDF pages 17 to 20 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 32F figure is the Clay County cold-day number a Keystone Heights heat pump is sized against, so ask the installer to show the system's heating output at 32F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Keystone Heights home has 6.4 rooms and was built around 1971, 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 Keystone Heights. The public number is the number the contractor quotes from.
No local contractor is named on this door for Keystone Heights yet. A request from this page goes to the first licensed shop that takes the door.