Roof fan is mounted on the roof of the roof ventilation exhaust fan, install and use the environment as a result of the special nature of the decision of the fan using special materials and structures. Roof fan setting the air after the shutdown to prevent backflow device, because the high-speed rotation of the fan in the hot action, resulting in the wind speed increases a lot of duct Kunming roof fan, fan motor reverse start very unfavorable roof fan Xinjiang, may be due to starting current is too Great damage. Roof fan in the design should have a reliable rain, snow, wind and sand proof performance, snow and sand like rain as Inner roof fans, not only because of the snow and sand into the fan from the upper part of the outdoor wind speed reaches a certain By strength is also possible into the fan from the lower portion. Roof fan according to different environment and transport media, made of conventional type, anti-corrosion, explosion-proof, corrosion-proof type. Can be made of all aluminum fire temperature exhaust fan roof according to requirements, and smoke damper disposed entrance. Optional accessories: can be arranged as needed gravity-return valve, anti-bird (insect) network, maintenance switches, roof fans, roof fans Xinjiang, Jianhua FRP (certified merchants) are provided by the Texas Jianhua FRP Blower. Texas Jianhua FRP Blower (www.fengjifrp.com) located in Dezhou City, Shandong Province, Lu right Tuen Industrial Park. Scraps and development in the wave of market economy, the current BSP FRP has a high profile in the fan, ventilation equipment, and enjoy a good reputation. Jianhua FRP made the whole network business alliance certification, marking our service and management level has reached a new height. Jianhua FRP staff willing to work with all people of insight and common development, for a better future.