Central air-conditioning fan coil can be divided according to the number of rows of tubes: two rows of tubes, three rows of tubes; there are two control points and four controls: two controls that ordinary fan coil go cold summer cooling and winter heating hot water go; four pipe fan coil used for some of the more luxurious places you can go hot and cold at the same time, which can refrigeration needed some room, some rooms warm. Two rows of tubes into a cold summer, one out of cold water into a hot water in winter, a hot water; three rows of tubes are two water fan shape length dimensions, one into the cold water into a hot water two-speed fan motor repair phone, while a water. Principle: The fan coil forced to rely on the role of the main fan, the air when the surface is heated by the heater, thereby strengthening the convective heat exchanger between the radiator and the air, quickly heating the air of the room. Fan coil air conditioning system is the end of the device, which works out constantly recycling unit mounted inside the room where the air duct, the air through the cold water (hot water) after the cooling coil (heating) in order to keep the room temperature constant. Fans usually bolt hole size, through the new air handling unit into the room to meet the needs of fresh air conditioned room temperature exhaust fan HTF series fire department national "Spark" project products, with excellent performance, high temperature performance, high efficiency, small footprint than the centrifugal fan, easy installation features. 2, HTF Fire fan high temperature performance: Fan tested in accordance with GBJ45-82 Fire Code standards, establish higher standards of corporate internal control to ensure that the system can run continuously at 300 ℃ high temperature for 60 minutes or more, under 100 ℃ temperature conditions Continuous 20 hours / times without damage, widely used in high-level civil, oven, underground garages, tunnels and other occasions. 3, performance HTF Fire fan performance table shows the performance of the fan is within the range of maximum efficiency, according to the air volume is divided into five performance points, according to prevail in the selection of the performance table. Fire fan factory qualified under rated air flow, total pressure value error does not exceed ± 5%, the performance of the selection table is a performance standard state, regardless of the technical documentation or ordering requirements. [1] HTF exhaust fan Technical Data Sheet exhaust muffler axial fan manufacturers, Jinxiang fans, air-conditioning equipment provided by Hao Yang Hao Yang Air Conditioning Equipment Co., Texas. Air Conditioning Equipment Co., Texas Hao Yang (www.dzapjt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hao Yang air conditioning and you hand into the brilliant, for a better future!