Stairwell installation height did not explain positive outlet, from a structural and safety point of view, a good exhaust fan mounted on the top, because the whole staircase connected, installed where almost; wind speed of not more than 7m / s pressure delivery outlet , but for the moment this value, the pressure loss is too large, depending on the system resistance Plumper Air Conditioning Equipment Co., Ltd. Shandong is located in the Texas Economic Development Tun Lu right. The company's main products are: pressure delivery outlet, air conditioning units, fresh air ventilator, wind chassis, positive pressure blower, muffler, ventilation, aluminum outlet, FRP wind ... pressure delivery outlet quote _ Rich ventilation equipment ( Certified) _ Weifang 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.