Liaocheng Flextronics Ventilation Equipment Co. specializes in non-powered and non-powered natural ventilation fan and so on. Ventilation selection methods a number of ventilation installation of building volume = A * B number of air changes per hour / C single ventilation ventilation capacity A, building volume = building length * width * height of buildings Buildings B, ACH: According to the building using the function, press the choice of two tables, specify: the above selection criteria are based on the average of the set of free power ventilators domestic statistics, under special conditions and environmental expertise by manufacturers selection of the number of authorized technician. Liaocheng Flextronics Ventilation Equipment Co. specializes in non-powered and non-powered natural ventilation fan and so on. No power ventilation utilizing the principle of natural convection of air ventilators offer free power, becomes in any direction parallel to the flow rate, and a vertical air stream conversion. With the use of the chimney effect itself free power ventilation companies, buildings and equipment, to achieve an internal and external ventilation equipment. No power ventilation applications: large factories, warehouses, stadiums, pet farm functional areas, high-rise buildings, residential and other ventilation. Free power ventilation manufacturers, Flextronics ventilators (certified), Beijing-free electricity from Liaocheng Flextronics ventilation ventilation equipment Limited. Liaocheng Flextronics Ventilation Equipment Co. (www.lcwctf.com) (www.lcwctf.com) is an industry leader in Shandong Liaocheng, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Flextronics ventilators in leadership with the staff warmly welcome all inquiries negotiations to create Flextronics ventilation a better future.