Phoenix / Flagstaff
Flagstaff has 76,445 residents (give or take 68) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US0423620, checked 2026-10-19), about 1,158 people per square mile.
Flagstaff is about 115 miles from the Census center point for Phoenix in a straight line and covers 66.016 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 Flagstaff that is 86011 (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).
Median household income in Flagstaff is $71,512 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US0423620, 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.
42% of Flagstaff homes are single-family detached, 11% are in two- to four-unit buildings and 31% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US0423620, checked 2026-10-19).
58% of Flagstaff homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US0423620, checked 2026-10-19), so beside the 42% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Flagstaff has 17 points fewer detached houses than Coconino County overall (59%) and 15 points more five-plus-unit buildings than the county's 16% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US04005, checked 2026-10-19).
58% of Flagstaff homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US0423620, 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.
Of the 28,550 occupied homes in Flagstaff, 67% heat with natural gas, 0% with heating oil, 26% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US0423620, checked 2026-10-19).
Gas heats 67% of Flagstaff against electricity at 26%, 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.
Flagstaff has about the Coconino County oil share of 0% and the same 26% electric share (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US04005, checked 2026-10-19).
No electric utility is on file for Flagstaff on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
SRP Cool Cash variable-capacity heat pump rebate, run by SRP, is a live program for Arizona addresses and covers qualifying equipment at $1,000 per system (registry row 32 verified 2026-10-14, https://www.srpnet.com/energy-savings-rebates/home/rebates/air-conditioner, checked 2026-10-16); confirm eligibility for the Flagstaff address before counting it. With 26% of Flagstaff homes already on electric heat and 70% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Efficiency Arizona HEAR (Home Efficiency and Electrification Rebates): $8,000 usd_max (https://efficiencyarizona.com/, checked 2026-10-16); confirm eligibility for the address.
Flagstaff has 31,994 housing units, 2% built before 1940 and 28% before 1980, with 34% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US0423620, checked 2026-10-19).
Flagstaff has 3 points more homes built after 2000 than the county's 31% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US04005, checked 2026-10-19).
The median Flagstaff home was built in 1992 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US0423620, checked 2026-10-19) and the median home has 4.9 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US0423620, checked 2026-10-19).
Heating design temperature: -3F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Coconino County row, 99% heating, PDF pages 7 to 8 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 -3F figure is the Coconino County cold-day number a Flagstaff heat pump is sized against, so ask the installer to show the system's heating output at -3F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 67% of Flagstaff on gas and 26% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Flagstaff home has 4.9 rooms and was built around 1992, 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 Flagstaff. The public number is the number the contractor quotes from.
No local contractor is named on this door for Flagstaff yet. A request from this page goes to the first licensed shop that takes the door.