Category | Average Vintage | 2013 Source Energy kBtu (kWh) | Average Site Energy Index kBtu/sf (kWh/m2) |
All Homes | 1983 | 145,532 (42,640) | 41.5 (131.4) |
All-electric | 1994 | 139,097 (40,755) | 33.9 (101.7) |
Dual-Fuel | 1978 | 148,787 (43,594) | 45.4 (143.4) |