South Dakota: 14 cities covered
South Dakota's cities mostly do not clear a positive payback against a like-for-like gas furnace replacement, which is itself the honest local answer.
- Sioux Falls — 209,289 people, 6045 HDD
- Rapid City — 79,894 people, 6176 HDD
- Aberdeen — 27,919 people, 6970 HDD
- Brookings — 24,555 people, 7012 HDD
- Watertown — 23,492 people, 7257 HDD
- Yankton — 15,670 people, 6007 HDD
- Mitchell — 15,621 people, 6356 HDD
- Huron — 14,515 people, 6681 HDD
- Box Elder — 13,887 people, 6176 HDD
- Spearfish — 13,803 people, 6525 HDD
- Pierre — 13,788 people, 6612 HDD
- Vermillion — 11,877 people, 6007 HDD
- Brandon — 10,837 people, 6045 HDD
- Harrisburg — 10,203 people, 6045 HDD