Indiana: 88 cities covered
Across 88 Indiana cities with a positive case for switching, the average incremental payback is about 183.9 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.
- Indianapolis — 891,484 people, 4285 HDD
- Fort Wayne — 273,203 people, 4861 HDD
- Evansville — 115,395 people, 3464 HDD
- Fishers — 103,986 people, 4894 HDD
- South Bend — 103,713 people, 4978 HDD
- Carmel — 103,606 people, 4894 HDD
- Bloomington — 79,986 people, 4101 HDD
- Hammond — 76,030 people, 4836 HDD
- Noblesville — 75,239 people, 4894 HDD
- Lafayette — 71,757 people, 4684 HDD
- Greenwood — 68,175 people, 4285 HDD
- Gary — 67,555 people, 4836 HDD
- Muncie — 65,320 people, 4444 HDD
- Westfield — 62,994 people, 4894 HDD
- Kokomo — 60,093 people, 4704 HDD
- Terre Haute — 58,531 people, 4142 HDD
- Anderson — 55,851 people, 4764 HDD
- Elkhart — 53,690 people, 4968 HDD
- Jeffersonville — 52,912 people, 3632 HDD
- Columbus — 51,970 people, 4010 HDD
- Mishawaka — 51,020 people, 4978 HDD
- Lawrence — 49,817 people, 4073 HDD
- West Lafayette — 46,338 people, 4684 HDD
- Portage — 38,576 people, 4617 HDD
- Plainfield — 37,796 people, 4285 HDD
- New Albany — 37,652 people, 3192 HDD
- Merrillville — 36,989 people, 4836 HDD
- Richmond — 35,561 people, 4586 HDD
- Crown Point — 35,097 people, 4971 HDD
- Valparaiso — 35,065 people, 5096 HDD
- Goshen — 34,458 people, 4329 HDD
- Brownsburg — 33,430 people, 4073 HDD
- Zionsville — 33,161 people, 4894 HDD
- Michigan City — 31,466 people, 5176 HDD
- Schererville — 29,780 people, 4971 HDD
- Hobart — 29,418 people, 4836 HDD
- Marion — 28,216 people, 3759 HDD
- Greenfield — 26,268 people, 3914 HDD
- Franklin — 26,158 people, 3914 HDD
- East Chicago — 25,768 people, 4836 HDD
- Avon — 24,735 people, 4285 HDD
- St. John — 24,250 people, 4971 HDD
- Munster — 23,634 people, 4971 HDD
- Highland — 23,497 people, 4971 HDD
- Seymour — 22,524 people, 4010 HDD
- La Porte — 22,444 people, 5223 HDD
- Clarksville — 22,041 people, 3632 HDD
- Shelbyville — 20,845 people, 3914 HDD
- Logansport — 18,168 people, 5097 HDD
- Lebanon — 17,608 people, 4894 HDD
- New Castle — 17,382 people, 4764 HDD
- Huntington — 17,033 people, 4861 HDD
- Jasper — 16,967 people, 3712 HDD
- Crawfordsville — 16,594 people, 4684 HDD
- Vincennes — 16,506 people, 3663 HDD
- Frankfort — 16,459 people, 4894 HDD
- Cedar Lake — 16,404 people, 4971 HDD
- Dyer — 16,341 people, 4971 HDD
- New Haven — 16,200 people, 4861 HDD
- Griffith — 16,192 people, 4971 HDD
- Warsaw — 16,111 people, 4939 HDD
- Chesterton — 14,655 people, 4617 HDD
- Beech Grove — 14,566 people, 4285 HDD
- Whitestown — 14,564 people, 4894 HDD
- Speedway — 14,268 people, 4073 HDD
- Auburn — 13,989 people, 4861 HDD
- Bedford — 13,853 people, 4041 HDD
- Connersville — 13,282 people, 3914 HDD
- Lake Station — 13,033 people, 4617 HDD
- Washington — 12,881 people, 4067 HDD
- Danville — 12,532 people, 4073 HDD
- Greensburg — 12,317 people, 4010 HDD
- Madison — 12,108 people, 3632 HDD
- Martinsville — 11,952 people, 4101 HDD
- Yorktown — 11,900 people, 4444 HDD
- McCordsville — 11,744 people, 4894 HDD
- Huntertown — 11,481 people, 4861 HDD
- Lowell — 11,449 people, 4971 HDD
- Bargersville — 11,283 people, 4285 HDD
- Plymouth — 11,042 people, 5260 HDD
- Peru — 11,003 people, 4675 HDD
- Bluffton — 10,556 people, 4861 HDD
- Kendallville — 10,326 people, 5289 HDD
- Wabash — 10,275 people, 4675 HDD
- Columbia City — 10,185 people, 4861 HDD
- Decatur — 10,072 people, 4861 HDD
- Sellersburg — 10,057 people, 3632 HDD
- Mooresville — 10,027 people, 4285 HDD