Washington: 91 cities covered
Across 91 Washington cities with a positive case for switching, the average incremental payback is about 10.9 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.
- Seattle — 780,995 people, 4232 HDD
- Spokane — 230,609 people, 5519 HDD
- Tacoma — 228,202 people, 3501 HDD
- Vancouver — 198,992 people, 3851 HDD
- Bellevue — 154,377 people, 4187 HDD
- Kent — 136,588 people, 4626 HDD
- Everett — 113,011 people, 4489 HDD
- Spokane Valley — 108,267 people, 5519 HDD
- Renton — 105,543 people, 4187 HDD
- Federal Way — 100,252 people, 3501 HDD
- Yakima — 97,390 people, 5434 HDD
- Bellingham — 95,860 people, 5289 HDD
- Kirkland — 95,499 people, 4232 HDD
- Kennewick — 86,728 people, 4567 HDD
- Auburn — 85,513 people, 3501 HDD
- Redmond — 82,195 people, 4232 HDD
- Pasco — 81,724 people, 4567 HDD
- Marysville — 76,209 people, 5176 HDD
- Sammamish — 66,474 people, 4187 HDD
- Shoreline — 66,251 people, 4489 HDD
- Richland — 64,372 people, 4148 HDD
- Lakewood — 62,709 people, 4800 HDD
- Lacey — 58,644 people, 4916 HDD
- Olympia — 56,271 people, 4916 HDD
- Burien — 52,046 people, 4626 HDD
- Bothell — 51,770 people, 4489 HDD
- Bremerton — 45,291 people, 4841 HDD
- Edmonds — 42,871 people, 4489 HDD
- Puyallup — 42,552 people, 4867 HDD
- Lynnwood — 41,597 people, 4489 HDD
- Lake Stevens — 41,350 people, 4489 HDD
- Issaquah — 39,664 people, 4187 HDD
- Longview — 38,294 people, 4565 HDD
- Wenatchee — 35,401 people, 5255 HDD
- Mount Vernon — 35,344 people, 5087 HDD
- University Place — 35,160 people, 4444 HDD
- SeaTac — 34,024 people, 4626 HDD
- Walla Walla — 33,901 people, 4960 HDD
- Pullman — 33,543 people, 6235 HDD
- Des Moines — 33,207 people, 4626 HDD
- Maple Valley — 28,553 people, 4187 HDD
- Tumwater — 27,826 people, 4916 HDD
- Camas — 27,313 people, 3827 HDD
- Moses Lake — 26,969 people, 5289 HDD
- Mercer Island — 25,302 people, 4232 HDD
- Mountlake Terrace — 25,198 people, 4489 HDD
- Bainbridge Island — 24,618 people, 4232 HDD
- Kenmore — 24,166 people, 4489 HDD
- Oak Harbor — 24,163 people, 5401 HDD
- Battle Ground — 22,959 people, 4131 HDD
- Bonney Lake — 22,145 people, 4867 HDD
- Arlington — 21,959 people, 5176 HDD
- Tukwila — 21,636 people, 4626 HDD
- Covington — 21,567 people, 4187 HDD
- Mukilteo — 21,299 people, 4489 HDD
- Ellensburg — 20,996 people, 5751 HDD
- Mill Creek — 20,993 people, 4489 HDD
- Port Angeles — 20,112 people, 5438 HDD
- Monroe — 19,927 people, 4489 HDD
- Port Orchard — 19,122 people, 4841 HDD
- Centralia — 19,061 people, 4926 HDD
- West Richland — 18,820 people, 4148 HDD
- Anacortes — 18,148 people, 4971 HDD
- Washougal — 17,944 people, 3827 HDD
- Aberdeen — 17,044 people, 5112 HDD
- Lynden — 16,783 people, 5289 HDD
- Ferndale — 16,706 people, 5289 HDD
- Sunnyside — 16,317 people, 5434 HDD
- Ridgefield — 15,359 people, 4131 HDD
- East Wenatchee — 14,330 people, 5255 HDD
- Woodinville — 13,942 people, 4489 HDD
- Snoqualmie — 13,748 people, 4187 HDD
- Edgewood — 13,496 people, 3501 HDD
- Liberty Lake — 13,353 people, 5519 HDD
- Lake Forest Park — 13,276 people, 4489 HDD
- Sedro-Woolley — 13,215 people, 5087 HDD
- Enumclaw — 13,173 people, 4867 HDD
- Newcastle — 13,072 people, 4187 HDD
- Kelso — 12,737 people, 4565 HDD
- Cheney — 12,700 people, 6756 HDD
- Gig Harbor — 12,643 people, 4444 HDD
- Poulsbo — 12,562 people, 4841 HDD
- Airway Heights — 11,950 people, 5871 HDD
- Yelm — 11,715 people, 4752 HDD
- Grandview — 11,599 people, 4148 HDD
- Fife — 11,077 people, 3501 HDD
- Burlington — 10,945 people, 5087 HDD
- Sumner — 10,885 people, 4867 HDD
- Shelton — 10,737 people, 5181 HDD
- Port Townsend — 10,649 people, 4741 HDD
- Snohomish — 10,534 people, 4489 HDD