Shandong's largest production base blower pressure - pressure blower direct manufacturers. Sales Hotline: 13573487358 pressurized air is generally located in the stairwell, the event of a fire the fire floor and the adjacent upper and lower positive pressure blower is turned on, transport of fresh air and prevent the stairwell fire door open to prevent smoke entering the stairwell ---- stairwell when people are not rushing to escape smoke. Exhaust fan through the exhaust duct, the flue gas outlet excluded. When the flue gas temperature higher than 280 degrees automatically shut down. Positive pressure blower is pointing escape corridor air supply fan. It outdoor air pressure into the interior. When the building is on fire, it will produce a lot of smoke, carbon monoxide and other toxic gases and block the line of sight, through positive pressure blower air to escape the fire stairs, indoor smoke can not reach the stairs, to create conditions for people to escape. Positive pressure blower generally installed on the building roof.