” How come we even have to have ventilation in the first place? The solution will be to aid the health and fitness and wellbeing of indoor occupants by improving upon the caliber of the air they breathe. Determine 1: Exhaust Ventilation Technique (DOE) Exhaust ventilation systems do the job https://cibse55667.develop-blog.com/35248683/detailed-notes-on-lift-shaft-ventilation