The International Journal of Ventilation;
Taylor & Francis
Few ﬁeld studies have evaluated ventilation strategies, such as temporarily increasing the ventilation rate, to counter the high pollutant-load from off-gassing of volatile compounds from new materials in these buildings. We reviewed longitudinal studies that measured both ventilation rate (i.e. fresh air change rate) and airborne concentration of total volatile organic compounds (TVOC). Rates of emission of TVOC follow a multi-exponential decay trend over time after completion of a building. A tri-exponential trend-was ﬁtted by quantile regression. Although the ventilation rate is key to controlling airborne concentrations, it does not noticeably inﬂuence TVOC emission rates. Specifying low-emitting materials, or bake-out before occupancy, both have a signiﬁcant impact on emission rates . The results can be used to assess and size energy-efﬁcient practical ventilation strategies (such as demand-controlled ventilation) to keep the concentration of TVOCs within acceptable levels during hours of occupancy after completion of a new or renovated building.
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