Arizona: 44 cities covered
Across 44 Arizona cities with a positive case for switching, the average incremental payback is about 4.5 years against a like-for-like gas furnace replacement — but that average hides real spread, which is why each city gets its own page rather than one statewide number.
- Phoenix — 1,673,164 people, 1212 HDD
- Tucson — 554,013 people, 1430 HDD
- Mesa — 517,151 people, 984 HDD
- Gilbert — 288,790 people, 1399 HDD
- Chandler — 281,231 people, 761 HDD
- Glendale — 258,143 people, 709 HDD
- Scottsdale — 246,170 people, 1113 HDD
- Peoria — 199,924 people, 1212 HDD
- Tempe — 190,114 people, 715 HDD
- Surprise — 167,564 people, 1050 HDD
- Goodyear — 118,186 people, 730 HDD
- Buckeye — 114,334 people, 1429 HDD
- Yuma — 103,559 people, 688 HDD
- Avondale — 96,609 people, 730 HDD
- Queen Creek — 83,781 people, 1399 HDD
- Flagstaff — 77,539 people, 6203 HDD
- Maricopa — 76,654 people, 1396 HDD
- Casa Grande — 68,927 people, 1396 HDD
- Marana — 62,380 people, 1676 HDD
- Lake Havasu City — 59,037 people, 1055 HDD
- Prescott Valley — 51,440 people, 3997 HDD
- Oro Valley — 48,855 people, 1165 HDD
- Prescott — 48,224 people, 3997 HDD
- Sierra Vista — 44,710 people, 2043 HDD
- Apache Junction — 44,309 people, 1399 HDD
- Bullhead City — 43,266 people, 1014 HDD
- San Luis — 40,064 people, 688 HDD
- Sahuarita — 37,448 people, 1346 HDD
- El Mirage — 36,468 people, 1050 HDD
- Kingman — 35,383 people, 2886 HDD
- Florence — 24,891 people, 1399 HDD
- Fountain Hills — 23,696 people, 984 HDD
- Nogales — 19,965 people, 2164 HDD
- Coolidge — 19,674 people, 1396 HDD
- Eloy — 19,199 people, 1396 HDD
- Payson — 16,762 people, 3645 HDD
- Douglas — 15,819 people, 2549 HDD
- Somerton — 14,902 people, 688 HDD
- Chino Valley — 13,911 people, 3997 HDD
- Cottonwood — 12,939 people, 2941 HDD
- Camp Verde — 12,608 people, 2941 HDD
- Paradise Valley — 12,523 people, 1113 HDD
- Show Low — 12,366 people, 4868 HDD
- Safford — 10,257 people, 2239 HDD