Standard blower fan manufacturing and detection based mainly GB / T 1236-2000 "industrial fan duct standardized performance tests", JB / T 9068-1999 "to the multi-blade centrifugal fan before", JB / T 8932-1999 "Wind chassis", GB 10080-2001 "air conditioning fan safety requirements", JB / T 9069-2000 "roof ventilator", GB 10178-2006 "industrial fan site performance test", JB / T 10281-2001 "Fire exhaust fan technical conditions ", GB / T 13933-2008" Small cross flow fan ", JB / T 6411-1992" HVAC, air conditioning with axial fan ", JB / T 7258-2006" General Purpose centrifugal blower ", JB / T 10562-2006" general purposes technical conditions ", JB / T 10563-2006" general purpose centrifugal fan technical conditions ", GB 19761-2009" fan energy efficiency limit value and energy efficiency evaluation value ", JG / T 259-2009" Jet induction unit ", JB / T 7221-1994" unit air conditioning units with double inlet centrifugal fan ", JB / T 8932-1999" air box ", GBT 19075 -2003 "Industrial Fan vocabulary definitions and types", etc. [SWF (B)] Series Low Noise Francis fan is between saving a new fan axial and centrifugal fans between its high pressure centrifugal fans, axial fans high-volume, high-efficiency saving the good factory roof fan, low noise, easy installation and so on. This series of fan design Ying, compact structure, small size how much of a roof fan, light weight, easy to install, and old-fashioned compared to centrifugal fans can save 20%, speed is less than 2000r / min, the noise is less than 75dB (A), connecting pipes and fan mounted inside the air conditioner, noise is less than 70dB (A). Can replace the fan, low-pressure centrifugal fan 2000pa less widely used in industry, civil construction, such as ventilation and dust. Roof fan manufacturers | Fans | Hao Yang air conditioning equipment provided by the Texas Air Conditioning Equipment Co., Ltd. Hao Yang. Air Conditioning Equipment Co., Texas Hao Yang (www.dzhykt.com) strong, credible, in Dezhou chemical fiber fabrics, materials, and other industries 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!