The purpose of this study is to propose a novel method to pressurize a room using a ventilation system to block outdoor PM2.5 through infiltration. We made various cases according to the building airtightness performance, pressurization ratio, and filter level, and evaluated the performance of the proposed method using simulation. As the simulation method, CONTAM, mass balance equation, simple thermal load equation, and regression equation were used. As a result, first, using the proposed method, the indoor PM2.5 concentration could be reduced to a maximum of 30% even on a day when the outdoor PM2.5 concentration is high. Second, in the case of airtight buildings, it showed excellent performance even with less pressure. Third, improving the filter level of the ventilation system was a good way to further reduce indoor PM2.5. Finally, a moderate level of pressurization strategy was found to be thermally beneficial.
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Engineering (miscellaneous)