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Table 3 Regional emission reductions 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
PM 2.5 (tons/year, % of national total)      
   Electricity 82 (4%) 260 (12%) 1,600 (74%) 210 (10%) 2,100
   Residential (NG + Oil) 210 (21%) 480 (49%) 200 (20%) 94 (10%) 990
   Total 290 (9%) 740 (24%) 1,800 (57%) 300 (10%) 3,100
SO 2 (tons/year, % of national total)      
   Electricity 9,100 (5%) 21,000 (12%) 130,000 (78%) 8,300 (5%) 170,000
   Residential (NG + Oil) 14,000 (69%) 3,000 (15%) 3,100 (15%) 260 (1%) 20,000
   Total 23,000 (12%) 24,000 (12%) 140,000 (71%) 8,600 (4%) 190,000
NOx (tons/year, % of national total)      
   Electricity 2,900 (4%) 9,300 (12%) 57,000 (74%) 7,500 (10%) 77,000
   Residential (NG + Oil) 6,800 (28%) 11,000 (44%) 4,700 (20%) 2,000 (8%) 24,000
   Total 9,700 (10%) 20,000 (20%) 62,000 (61%) 9,500 (9%) 100,000
  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.