Alabama: 66 cities covered
Across 66 Alabama cities with a positive case for switching, the average incremental payback is about 11.8 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.
- Huntsville — 230,402 people, 2436 HDD
- Mobile — 201,367 people, 1190 HDD
- Birmingham — 196,357 people, 2068 HDD
- Montgomery — 195,818 people, 1685 HDD
- Tuscaloosa — 114,288 people, 1987 HDD
- Hoover — 93,013 people, 1863 HDD
- Auburn — 83,757 people, 1725 HDD
- Dothan — 71,650 people, 1483 HDD
- Madison — 64,029 people, 2436 HDD
- Decatur — 57,974 people, 2488 HDD
- Florence — 42,716 people, 2644 HDD
- Prattville — 40,139 people, 1685 HDD
- Phenix City — 38,509 people, 1708 HDD
- Vestavia Hills — 38,151 people, 2068 HDD
- Opelika — 35,005 people, 1725 HDD
- Alabaster — 34,460 people, 2103 HDD
- Gadsden — 33,086 people, 2459 HDD
- Athens — 32,587 people, 2488 HDD
- Northport — 31,492 people, 1987 HDD
- Daphne — 30,751 people, 1470 HDD
- Enterprise — 30,731 people, 1412 HDD
- Foley — 28,043 people, 1169 HDD
- Homewood — 27,919 people, 2068 HDD
- Trussville — 27,079 people, 2068 HDD
- Fairhope — 26,044 people, 1470 HDD
- Pelham — 25,396 people, 2103 HDD
- Bessemer — 25,079 people, 1863 HDD
- Albertville — 23,392 people, 2565 HDD
- Helena — 22,200 people, 1863 HDD
- Oxford — 22,088 people, 2326 HDD
- Mountain Brook — 21,701 people, 2068 HDD
- Anniston — 21,127 people, 2326 HDD
- Cullman — 20,239 people, 2627 HDD
- Prichard — 18,778 people, 1098 HDD
- Calera — 18,530 people, 2103 HDD
- Troy — 17,734 people, 1848 HDD
- Gulf Shores — 17,431 people, 1169 HDD
- Muscle Shoals — 17,409 people, 2359 HDD
- Millbrook — 17,392 people, 1685 HDD
- Chelsea — 17,293 people, 2103 HDD
- Saraland — 16,458 people, 1098 HDD
- Gardendale — 16,444 people, 2068 HDD
- Selma — 16,312 people, 1831 HDD
- Hartselle — 16,201 people, 2633 HDD
- Hueytown — 16,185 people, 1863 HDD
- Scottsboro — 15,957 people, 3057 HDD
- Center Point — 15,603 people, 2068 HDD
- Fort Payne — 15,017 people, 2879 HDD
- Talladega — 14,693 people, 2071 HDD
- Jacksonville — 14,651 people, 2326 HDD
- Jasper — 14,561 people, 2663 HDD
- Alexander City — 14,439 people, 2101 HDD
- Ozark — 14,368 people, 1495 HDD
- Pell City — 14,094 people, 2427 HDD
- Moody — 13,596 people, 2068 HDD
- Irondale — 13,545 people, 2068 HDD
- Leeds — 12,573 people, 2068 HDD
- Eufaula — 12,363 people, 1776 HDD
- Sylacauga — 12,123 people, 2262 HDD
- Pike Road — 11,500 people, 1685 HDD
- Spanish Fort — 11,118 people, 1098 HDD
- Russellville — 10,736 people, 2813 HDD
- Boaz — 10,473 people, 2565 HDD
- Rainbow City — 10,349 people, 2459 HDD
- Clay — 10,241 people, 2068 HDD
- Valley — 10,144 people, 2422 HDD