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. Author manuscript; available in PMC: 2014 Dec 17.
Published in final edited form as: J Toxicol Environ Health A. 2013;76(0):333–344. doi: 10.1080/15287394.2013.757213

Table 2.

ECC Building Characteristics, Expressed as Percentage

Heating systems
  Central 30
  Gas and oil heaters 70
Interior conditions
  Condensation 56
  Leaks 67
Insulation 33
Power supply
  Electricity 56
  Gas 67
Proximity to traffic 89
Single pane glass 78
Stone masonry 78
Window frames (wood) 67