Louisville / Mayfield
Mayfield has 9,868 residents (give or take 139) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2150898, checked 2026-10-19), about 1,343 people per square mile.
Mayfield is about 192 miles from the Census center point for Louisville in a straight line and covers 7.35 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 4,429 occupied homes in Mayfield, 70% heat with natural gas, 0% with heating oil, 27% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2150898, checked 2026-10-19).
Gas heats 70% of Mayfield against electricity at 27%, so most quotes here are a partial-home system that carries the shoulder seasons and the summer while the gas furnace handles the coldest nights, or a whole-home system when the house is ready for it.
Mayfield has about the Graves County oil share of 1% and 12 points less electric heat than the county's 39% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US21083, checked 2026-10-19).
Mayfield has 5,186 housing units, 7% built before 1940 and 79% before 1980, with 6% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2150898, checked 2026-10-19).
Mayfield has 14 points fewer homes built after 2000 than the county's 20% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US21083, checked 2026-10-19).
The median Mayfield home was built in 1966 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2150898, checked 2026-10-19) and the median home has 5.5 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2150898, checked 2026-10-19).
81% of Mayfield homes are single-family detached, 10% are in two- to four-unit buildings and 4% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2150898, checked 2026-10-19).
With 81% detached houses and 10% in small multi-family buildings, a Mayfield quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 38% of Mayfield homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2150898, checked 2026-10-19), the landlord signs the quote in many of them.
79% of Mayfield homes were built before 1980 and only 6% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2150898, 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 Mayfield 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 Mayfield is $40,965 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2150898, 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: 15F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Graves County row, 99% heating, PDF pages 46 to 51 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 Graves County cold-day number a Mayfield 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 whether the quote is whole-home or partial-home, because with 70% of Mayfield on gas and 27% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Mayfield home has 5.5 rooms and was built around 1966, 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 Mayfield. The public number is the number the contractor quotes from.
No local contractor is named on this door for Mayfield yet. A request from this page goes to the first licensed shop that takes the door.