Massachusetts: 58 cities covered
Across 58 Massachusetts cities with a positive case for switching, the average incremental payback is about 42.8 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.
- Boston — 673,458 people, 5029 HDD
- Worcester — 211,286 people, 5603 HDD
- Springfield — 154,888 people, 5424 HDD
- Cambridge — 121,186 people, 4588 HDD
- Lowell — 120,418 people, 5514 HDD
- Brockton — 105,788 people, 4997 HDD
- Lynn — 103,489 people, 5701 HDD
- Quincy — 103,434 people, 4588 HDD
- New Bedford — 101,318 people, 5048 HDD
- Fall River — 94,689 people, 4514 HDD
- Newton — 90,700 people, 4588 HDD
- Lawrence — 89,332 people, 5514 HDD
- Somerville — 82,149 people, 4588 HDD
- Framingham — 73,361 people, 5633 HDD
- Haverhill — 68,291 people, 5514 HDD
- Malden — 66,693 people, 5029 HDD
- Waltham — 65,849 people, 5633 HDD
- Taunton — 61,936 people, 4998 HDD
- Revere — 60,702 people, 5029 HDD
- Weymouth Town — 60,159 people, 5029 HDD
- Medford — 59,898 people, 4588 HDD
- Peabody — 55,418 people, 5701 HDD
- Chicopee — 55,381 people, 5424 HDD
- Methuen — 54,272 people, 5514 HDD
- Everett — 51,825 people, 5029 HDD
- Barnstable Town — 49,831 people, 5453 HDD
- Attleboro — 47,085 people, 5467 HDD
- Salem — 45,677 people, 5701 HDD
- Leominster — 44,209 people, 5524 HDD
- Woburn — 43,895 people, 5633 HDD
- Beverly — 43,223 people, 5701 HDD
- Pittsfield — 43,121 people, 6277 HDD
- Marlborough — 42,169 people, 5633 HDD
- Fitchburg — 42,145 people, 5524 HDD
- Amherst Town — 40,989 people, 5424 HDD
- Westfield — 40,403 people, 5447 HDD
- Chelsea — 40,245 people, 5029 HDD
- Braintree Town — 39,134 people, 4997 HDD
- Holyoke — 37,838 people, 5447 HDD
- Watertown — 35,985 people, 4588 HDD
- Randolph Town — 35,114 people, 4997 HDD
- Franklin Town — 33,742 people, 5467 HDD
- Northampton — 31,315 people, 5424 HDD
- North Attleborough Town — 31,210 people, 5467 HDD
- Gloucester — 30,491 people, 5701 HDD
- Melrose — 29,938 people, 5029 HDD
- Bridgewater Town — 29,167 people, 4998 HDD
- West Springfield Town — 29,028 people, 5447 HDD
- Agawam Town — 28,749 people, 5447 HDD
- Gardner — 21,381 people, 5524 HDD
- Newburyport — 19,163 people, 5514 HDD
- Winthrop Town — 18,739 people, 5029 HDD
- Southbridge Town — 18,106 people, 5603 HDD
- Greenfield — 17,633 people, 6016 HDD
- Amesbury — 17,617 people, 5514 HDD
- Easthampton — 16,020 people, 5447 HDD
- North Adams — 12,492 people, 5799 HDD
- Palmer Town — 12,388 people, 5424 HDD