Skip to main content

Advertisement

Table 4 Average CO2 differential, air changes per hour and sick leave rates for each intervention period

From: A study of indoor carbon dioxide levels and sick leave among office workers

Period Building 1
Dates Outdoor Air Rate Average ACH1 Average CO2 Differential during day of SF6 test CO2 Differential (ppm) during period during day of SF6 test Sick Leave Rate (sick hrs/scheduled hrs)
Jan 2000 – April 2000 High 2.5 107 127 0.0108
April 2000 – June 2000 Low 0.71 213 192 0.0129
July 2000 – Oct 2000 High 2.6 101 82 0.0154
Nov 2000 – March 2001 Low NA NA 95 0.0159
March 2001 – May 2001 High 1.3 153 126 0.0118
May 2001 – June 2001 Low NA NA 144 0.0068
  Building 2
Nov 2000 – Dec 2000 Low NA NA 111 0.0090
Dec 2000 – Feb 2001 High 1.2 145 120 0.0088
March 2001 – May 2001 Low NA NA 142 0.0104
May 2001 – June 2001 High NA NA 129 0.0130
  1. 1Average air changes per hour computed from SF6 tracer gas decay