dezhou rende ventilation equipment co., ltd. is an integrated company in design, sales and production. the company's main business is: wall axial flow fan, normally closed multi-leaf air supply vent, roof fan, positive pressure air supply, fire smoke exhaust fan, side wall exhaust fan, explosion-proof axial flow fan, positive pressure air supply vent, air volume regulating valve and other products. complete equipment, complete production process, strict process management, strict quality inspection, and various manufacturing advantages such as high efficiency, energy consumption, low noise, compact mechanism, excellent balance accuracy, and long service life.