This system introduces air right into a making, usually just after filtering and tempering it, to create a good tension. This ensures that any uncontrolled air leakage is from within to outside, lowering the entry of pollutants. controlled ventilation (Handle method ventilation) constructive stress ventilation in which the ventilator is https://ventilation-ductwork79012.glifeblog.com/36281389/the-2-minute-rule-for-ventilation