Mississippi: 41 cities covered
Across 41 Mississippi cities with a positive case for switching, the average incremental payback is about 11.0 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.
- Jackson — 141,449 people, 1765 HDD
- Gulfport — 74,621 people, 1151 HDD
- Southaven — 57,493 people, 2396 HDD
- Hattiesburg — 48,522 people, 1503 HDD
- Biloxi — 48,144 people, 1081 HDD
- Olive Branch — 47,365 people, 2525 HDD
- Tupelo — 37,775 people, 2261 HDD
- Meridian — 33,549 people, 1928 HDD
- Pearl — 28,458 people, 1686 HDD
- Madison — 28,210 people, 1765 HDD
- Greenville — 27,015 people, 1966 HDD
- Oxford — 26,801 people, 2719 HDD
- Clinton — 26,617 people, 1947 HDD
- Horn Lake — 26,574 people, 2396 HDD
- Brandon — 25,870 people, 1686 HDD
- Starkville — 25,844 people, 2343 HDD
- Ridgeland — 24,576 people, 1765 HDD
- Columbus — 22,820 people, 2199 HDD
- Pascagoula — 21,476 people, 1277 HDD
- Vicksburg — 20,032 people, 1785 HDD
- Gautier — 19,055 people, 1277 HDD
- Ocean Springs — 18,954 people, 1081 HDD
- Hernando — 18,542 people, 2396 HDD
- Laurel — 17,508 people, 1723 HDD
- Long Beach — 17,217 people, 1151 HDD
- Natchez — 14,233 people, 1675 HDD
- Corinth — 14,219 people, 2776 HDD
- Clarksdale — 13,861 people, 2314 HDD
- Greenwood — 13,627 people, 1903 HDD
- D'Iberville — 13,399 people, 1081 HDD
- Byram — 12,656 people, 1947 HDD
- Grenada — 12,138 people, 1903 HDD
- Picayune — 12,017 people, 1348 HDD
- Moss Point — 11,791 people, 1277 HDD
- McComb — 11,762 people, 1651 HDD
- Brookhaven — 11,654 people, 1651 HDD
- Petal — 11,538 people, 1503 HDD
- Flowood — 10,853 people, 1686 HDD
- Canton — 10,777 people, 1686 HDD
- Bay St. Louis — 10,526 people, 837 HDD
- Cleveland — 10,183 people, 1966 HDD