Exhaust fans axial fans: air flow along the axial movement of the fan impeller. Centrifugal fan total pressure is large, the motor isolated from the hot gas fumes. Not easily damaged. Small axial fans, in general, at the high temperature gas fumes to go through the motor, easily damaged. Kitchen generally recommended to use a centrifugal fan. Centrifugal fans and former stars to the multi-leaf impeller and backward impeller. Comparison to the front wheel and rear wheel advantages :() opt for a lower speed (low noise), smaller diameter can get a larger air volume total pressure. Forward impeller disadvantages: low efficiency, high energy consumption, easy cleaning cleaning. After the impeller advantages: high efficiency, energy saving, easy cleaning cleaning. After disadvantage compared to the impeller to the impeller) to be given equal air flow and total pressure required for high speed (and therefore noise), and a larger diameter front :(. We plan on several projects in recent years, but stresses, such as Tianmu Road Branch train halfway Shanghai China Electronic Information Management Building, the building a total of 16 floors, the underground chamber (2000m2 top and bottom) of the brake library. In planning we consider the harm tobacco and machine smoke machine, both set outlet in every room floor escalator, front room and other locations, after the fan pressurized air supply, it produces positive pressure profile and then curse violations kitchen exhaust fumes pipeline fan to keep things safe dispersed. Set on the channel exhaust valves, top pull or move closer to the top of the wall is set to pull the exhaust port, the exhaust flue gas discharge machine Chu outdoor temperature is high. And screening large radiation surface is provided with a partition harm axial flow exhaust fan, exhaust smoke smoke smoke sense only when the investigation is reported in which the harm tobacco partition. So as to expand and increase pre harm casual exhaust fan exhaust areas, causing fireworks discrete. Otherwise, not only affects the role of htf smoke exhaust fan, also may lead to the flue gas temperature due to high non fire sprinkler lotus position on their own tents and mess spray head fracture, affecting both the fire effect and cause unwanted infringement . HTF series exhaust fan fire for high-rise buildings, underground buildings and tunnels, drying room and other high-temperature exhaust or ventilation. Continuous operation at 280 ℃ under the high temperature for 30 minutes or more, the medium temperature at 100 ℃ continuous operation 20 hours / times without damage, fire is the ideal necessary facilities. 1, the performance of the fan performance table lists the properties in the most efficient range, according to the performance of the air volume is divided into five working points, according to prevail in the selection of the performance table. Qualified fan factory is rated flow, total pressure error does not exceed ± 5%, the performance of the selection list is performance under standard conditions, regardless of the technical documentation or performance are subject to the requirements of the standard state orders; 2, the fan installation can be divided into horizontal and roof type, air volume, total pressure, dimensions and other properties have special requirements; roof exhaust fan | Zoucheng exhaust fan | Chenyu conditioned by Wu Cheng Chen-yu air-conditioning Co. . Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chenyu into the brilliant air conditioning and you work for a better future!