PERCEIVED AIR QUALITY AND SENSORY POLLUTION LOADS IN SIX DANISH OFFICE BUILDINGS

摘要

Perceived air quality and sensory pollution loads were measured in 6 office buildings with mechanical ventilation without recirculation, in each building in 6 representative non-smoking medium-sized and small offices with mixing ventilation. An untrained panel of 43 subjects assessed the air quality on a normal weekday when the building was occupied, and on a weekend without occupants in the building. On both occasions the ventilation system was in operation as on normal working day. Outdoor air supply rate, air temperature, relative humidity, concentration of carbon dioxide and ultrafine particles were measured. The percentage of persons dissatisfied with air quality ranged from 3 to 30%, decreasing with increasing outdoor air supply rate from 1 to 4 L/(s·m~2floor). Total sensory pollution loads ranged 0.08 to 0.37 olf/m~2floor in occupied buildings and 0.04 to 0.27 olf/m~2floor in unoccupied buildings. They are somewhat lower than the loads measured in earlier studies.