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Table 5 Mean decrease of CO 2 (ppm), temperature (°C) or relative humidity (%) compared to baseline measurements

From: A ventilation intervention study in classrooms to improve indoor air quality: the FRESH study

 

CO2(ppm)

 

T (°C)

 

RH (%)

 

Setting

mean decrease

SE

p

mean decrease

SE

p

mean decrease

SE

p

800 ppm

558

97.8

<0.001

0.56

0.35

0.144

8.5

2.4

0.005

1200 ppm

424

97.8

0.002

0.10

0.35

0.784

9.3

2.4

0.003

Difference between 800 and 1200 ppm

134

29.3

0.001

0.46

0.24

0.088

0.8

2.3

0.734

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Environmental Health

ISSN: 1476-069X