Y. J. Building Material (Shanghai) Co., Ltd. is a professional company engaged in manufacturing and selling the end products of central air conditioners. Our company has won good reputation from clients and the products have been selected for numerous large-scale domestic projects. The company philosophy is “Quality highest, client first”. We warmly welcome clients both at home and abroad to cooperate with us. Main products:    1. Air opening: ABS plastic air opening, aluminum alloy air opening, electric air opening, spherical air opening and external air inlet    2. Valve: air volume control valve, opposite vane regulating valve, fire damper and electric air valve (iron or ABS made)    3. Ventilating duct: thermal insulating and non-insulating flexible hoses, super ventilating duct, spiral ventilating duct, FRB ventilating duct    4. Fan: fan coil, fan case, centrifugal fan, axial fan, ductline fan, power roof fan and exhaust fan    5. Noise eliminator: muffler, sound deadening static pressure case    6. Thermal insulating materials: centrifugal glass wool, rubber-plastics and PEF