Roof ventilation air flow exhaust accident should be based on the information provided process design determined by calculation, Liaocheng without power fan, when the process is not designed to provide the relevant calculations, the roof without power turbine prices, the room should be no less than the total volume per hour eight times the amount of ventilation OK. Exhaust accident should have completed the regular use of roof ventilators and accidents exhaust ventilation system in the event of an accident but must provide sufficient amount of exhaust. Roof ventilation exhaust air accident should be based on the information provided process design determined by calculation, when the process is not designed to provide relevant calculations, shall be not less than 8 times per hour room ventilation to determine the total volume. Exhaust accident should have completed the regular use of roof ventilators and accidents exhaust ventilation system, roof without power turbine parts, but in the event of an accident must provide sufficient amount of exhaust. Without power fan purposes: 1, generate air convection, heat exhaust gas. 2, reduce the air conditioning load, increase the indoor fresh air. 3, the moisture out of the roof, Mei Qi, steam, keeping the roof dry. 4, instead of heavy-duty electric blower, save electricity costs reduce stent, minus the noise. Without power fan purposes: 1, generate air convection, heat exhaust gas. 2, reduce the air conditioning load, increase the indoor fresh air. 3, the moisture out of the roof, Mei Qi, steam, keeping the roof dry. 4, instead of heavy-duty electric blower, save electricity costs reduce stent, minus the noise. Roof without power fan ventilation Flextronics specifications _ _ by the Liaocheng Liaocheng without power fan ventilation Equipment Co., Ltd. Flextronics. Liaocheng Flextronics ventilation equipment (www.lcwctf.com) (www.lcwctf.com) is an industry leader in Shandong Liaocheng, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Flextronics ventilation in leadership with the staff warmly welcome all inquiries negotiations to create Flextronics ventilation a better future.