1, do not have the natural smoke conditions stairwell fan 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. In all three cases the virtual set pressurized air supply system. Its end is positive outlet Here is the style of products and drawings. Shandong Plumper Air Conditioning Equipment Co. located in Texas Lu right Tuen Economic Development. The company's main products are: pressure delivery outlet, air conditioning units, fresh air ventilator, wind chassis, positive pressure blower, muffler, ventilation, air aluminum, glass and steel production of wind ... pressure delivery outlet _ Rich ventilation equipment ( Certified) _ Chengde pressure delivery outlet provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) (www.frtfsb.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum limits to meet customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.