Pressure fan: general use in stairwells and elevator room air blower, so that toxic fumes can not enter. Because it is up and down the stairwell Unicom, the outlet pressure can also open, as long as the air evenly, it is generally done every 2 or 3 layers air from vertical blinds. The front room is not China Unicom, so order to facilitate escape in case of fire, is considering opening the fire floor and the adjacent layer of air, so to make electric outlet. Usually with dampers in place 280 degrees, 280 degrees when the fuse closed. And fire system linkage was found open fire signal pressure fan ---- --- open before the fire floor and the adjacent layer of the air chamber. China's wind power industry has experienced explosive growth after the hotel blower, entered the market in recent years, restructuring of pressure blowers, blower manufacturers are in the process or converting, or layoffs, or moved abroad, have resorted to their ability to ensure businesses survive. However, fans had produced since the end of the five-year warranty period is about to face the test run independently. It is understood that this year there will be wind turbines installed in large quantities after 2008 before the end of the warranty period, the wind farm operation and maintenance be placed in wind farm developer and operator in front of the most intractable problems. Pressure blower, rich ventilation equipment (certified), Yangquan blower provided by Dezhou rich ventilation plant. Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) is an industry leader in Shandong 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.