We are shanghai nautilus general equipment manufacturing co ltd. located in shanghai, china. we manufacture and supply hvac fan, ventilation equipment , industrial fan & air blower suitable for industrial, petroleum, lab , smoke removal, high-temperature gas exhaust, dual-speed smoke exhaust, explosion proof use. our main products are as following: 1.rooftop centrifugal exhaust fan ------aluminum construction, explosive air exhaust for direct-drive. 2.inline square centrifugal fan -----------high pressure duct fan 3.centrifugal utility fan -------------- fully welded casing, suitable for contaminated air exhaust 4.rooftop supply centrifugal fan -------upward air inlet: rain water free 5.centrifugal forward curved direct-drive height pressure blower-------high efficiency wheel and reliable 6.centrifugal backward curved direct-drive height pressure blower 7.rooftop axial exhaust fan ------------streamline profile design: wind-resistant 8.sidewall axial exhaust fan-------- side wall mounted, easy to install 9.sidewall axial supply fan 10.rooftop axial supply fan 11.low noise centrifugal cabinet fan-------smoke removal and high temperature resistant fan 12.mixed-flow exhaust fan-----multiple installation available,high efficiency, low noise , large volume 13.mixed-flow supply fan 14.mixed-flow smoke removal fan 15.direct fire gas heating air handling unit------safe and cost-saving 16.indirect gas fired space heating air handling unit please visit http://www.infinair.com.cn/ for more details. our products are widely used for: 1.common building, metro, railway station, museum 2.commercial building, hotel, office, villas, theater 3.domestic building 4.ferilizer plant, petro, chemical, pharmacy, factory 5.steel , glass, paper, drink, wine, food and other workshop 6.electronics, semi-conductor fields 7.auto-making factory, garage, airport 8.green house, laboratory 9.other fields we had done a great job to sell our products all over china. now we are aiming at international market and willing to find more customer who need our products. our products have many advantages: 1.amca sound and performance certificated 2.good fan wheel balancing degree : g2.5 3.advenced design for backward inclined centrifugal wheel 4.alumimun construction will make fan explosion-proof 5.optimized design to satisfy each customers different requirements. 6.low noise ,high efficiency, excellent quality will ensure the fan always operating in a good condition , which will save customer's time and money . 7.competitive pricing giving you better choice if you are interested in ventilation or industrial fan related products, please contact us at once. we'll give you the best service and lowest price direct from factory and good quality to help you win the competition!