FANROOMLESS ventilation system for an underground parking lot

The FANROOMLESS ventilation system for underground parking lot presents several unique characteristics. First, this system can reduce initial construction cost and uses the spaces moreeffectively by optimization of the ventilation facilities. Second, fan noise during operations can be reduced to under 65 dB(A). This study also presents the required exhaust rate (m3/hm2) to maintain acceptable CO level of25 ppm in accordance with the code. The data can help to calculate the required exhaust rate.