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Indoor environmental factors in office buildings during the COVID‐19 pandemic Measurements were conducted in 21 buildings except for the Building ID: V. Gray areas indicate the air environment requirements of the Act on Maintenance of Sanitation in Buildings. Data obtained from 9 a.m. to 5 p.m. on weekdays were analyzed. Circles indicate outliers. When the length of the whisker was 1.5 times longer than the inter‐quartile range, the value was defined as an outlier
