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Table 2 Regional energy savings for existing single-family homes increasing insulation from current practice to IECC 2000 levels.

From: The public health benefits of insulation retrofits in existing housing in the United States

  Northeast (NE/MA) Midwest (ENC/WNC) South (SA/ESC/WSC) West (MTN/PA) Total
All-electric homes      
   # households (millions) 1.0 1.6 11 3.8 17
   Source savings (TBTU/year, % of national total) 15 (5%) 31 (11%) 190 (69%) 41 (15%) 280
   Per-capita savings (MMBTU/household/year) 15 20 17 11 16
Non-electric heated homes      
   # households (millions) 6.5 9.9 7.5 5.3 29
   Source savings, fossil fuel (TBTU/year, % of national total) 130 (26%) 220 (46%) 97 (20%) 43 (9%) 490
   Source savings, electricity (TBTU/year, % of national total) 0.43 (2%) 1.6 (6%) 25 (89%) 0.98 (3%) 28
   Source savings, total (TBTU/year, % of national total) 130 (24%) 230 (44%) 120 (24%) 44 (8%) 520
   Per-capita savings(MMBTU/household/year) 19 23 16 8.3 18
  1. Note: Estimates are presented to two significant figures; sums may not add due to rounding. Percentages represent the fraction of benefits within each region.