Application: National high-rise building fire smoke design specification, these parts should set up a separate mechanical exhaust system 1, does not have the natural smoke conditions, specifications stairwell pressure delivery outlet, fire elevator room or shared room. 2, the use of natural smoke stairwell, it does not have the front room of natural smoke. 3, closed refuge floors. Pressurized air and are best placed in the bottom of the evacuation door, because it can guarantee blowing straight in when you open the mouth to prevent smoke evacuation evacuation mouth intrusion, which is where the pressurized air head to positive outlet prices | n Pressure outlet | Rich ventilation provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!