Pennsylvania: 68 cities covered
Across 68 Pennsylvania cities with a positive case for switching, the average incremental payback is about 402.1 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.
- Philadelphia — 1,573,916 people, 3879 HDD
- Pittsburgh — 307,668 people, 4313 HDD
- Allentown — 127,138 people, 4777 HDD
- Reading — 96,000 people, 4232 HDD
- Erie — 92,940 people, 4871 HDD
- Bethlehem — 79,453 people, 4777 HDD
- Scranton — 75,905 people, 5021 HDD
- Lancaster — 58,441 people, 4332 HDD
- Harrisburg — 50,649 people, 4003 HDD
- York — 45,241 people, 4542 HDD
- Wilkes-Barre — 44,661 people, 5021 HDD
- Altoona — 42,719 people, 4891 HDD
- State College — 41,228 people, 5127 HDD
- Norristown — 36,075 people, 4606 HDD
- Chester — 34,052 people, 3707 HDD
- Bethel Park — 32,376 people, 4313 HDD
- Easton — 30,432 people, 4777 HDD
- Hazleton — 30,354 people, 5021 HDD
- Monroeville — 27,966 people, 4313 HDD
- Williamsport — 27,628 people, 4912 HDD
- Lebanon — 26,456 people, 4401 HDD
- Plum — 26,420 people, 4313 HDD
- Pottstown — 23,553 people, 4449 HDD
- Chambersburg — 23,041 people, 4057 HDD
- West Chester — 22,758 people, 3787 HDD
- Carlisle — 22,517 people, 4003 HDD
- New Castle — 21,332 people, 4991 HDD
- Murrysville — 20,729 people, 4313 HDD
- Baldwin — 20,712 people, 4313 HDD
- Phoenixville — 20,286 people, 4449 HDD
- Lansdale — 19,154 people, 4606 HDD
- West Mifflin — 18,902 people, 4313 HDD
- Johnstown — 17,853 people, 5504 HDD
- McKeesport — 17,119 people, 4313 HDD
- Hanover — 16,728 people, 4542 HDD
- Hermitage — 15,839 people, 5003 HDD
- Franklin Park — 15,079 people, 4326 HDD
- Whitehall — 14,678 people, 4313 HDD
- Greensburg — 14,586 people, 4504 HDD
- Indiana — 14,294 people, 4783 HDD
- Dunmore — 14,249 people, 5021 HDD
- Wilkinsburg — 13,800 people, 4313 HDD
- Ephrata — 13,719 people, 4332 HDD
- Kingston — 13,476 people, 5021 HDD
- Pottsville — 13,404 people, 4232 HDD
- Coatesville — 13,390 people, 4538 HDD
- Washington — 13,334 people, 4609 HDD
- Bloomsburg — 13,286 people, 5063 HDD
- Butler — 13,010 people, 5018 HDD
- Sharon — 12,744 people, 5003 HDD
- Yeadon — 12,405 people, 3829 HDD
- St. Marys — 12,361 people, 5757 HDD
- Meadville — 12,347 people, 5219 HDD
- Emmaus — 12,314 people, 4777 HDD
- Jefferson Hills — 12,291 people, 4313 HDD
- Elizabethtown — 11,993 people, 4324 HDD
- New Kensington — 11,877 people, 4313 HDD
- Lower Burrell — 11,542 people, 5018 HDD
- Wyomissing — 11,292 people, 4232 HDD
- Lansdowne — 11,225 people, 3829 HDD
- Waynesboro — 11,101 people, 4057 HDD
- Darby — 10,749 people, 3829 HDD
- Nanticoke — 10,730 people, 5021 HDD
- Northampton — 10,587 people, 4777 HDD
- Columbia — 10,399 people, 4332 HDD
- Munhall — 10,371 people, 4313 HDD
- Berwick — 10,332 people, 5021 HDD
- Mechanicsburg — 10,085 people, 4003 HDD