The ventilation system using ventilator which placed on roof is commonly used in every apartment housing. But in private opinion it does not fit in over 20-stary apartment housing. Therefore, examine the air change rates using Trracer Gas Method at 1s...
The ventilation system using ventilator which placed on roof is commonly used in every apartment housing. But in private opinion it does not fit in over 20-stary apartment housing. Therefore, examine the air change rates using Trracer Gas Method at 1st floor, 10th floor and 20th floor m already built-in 20-story apartment housing. Air change rates is measured under two conditions : using roof ventilator (natural ventilation) and using ventilating exhaust fan (mechanical ventilation) and measured three times every condition
The conclusion is forced on comparing natural ventilation system and mechanical ventilation system with considering out-door weather.
The air change rates under natural ventilation condition is from 3.83r/h to 5.07r/h, and the air change rates under mechanical ventilation condition is from 3.83r/h to 5.47r/h. It means that mechanical ventilation system is superior to natural ventilation system by more than 27% or less than 53%.