The detailed description of sound insulation ventilators in ventilation, ventilation, while reducing or eliminating the noise function. Standardization of non-working state component weighted sound pressure level (Dn, e, w) should be greater than 25dB sound insulation ventilation state of the components weighted standardized sound pressure level difference (Dn, e, w) should be greater than 33dB. Heat transfer coefficient (K) should not be less than 4.0W / (m? K). Repeatedly to switch the life of more than 4000 times. 
 In urban traffic side of the road, the need to reduce the noise impact of residential buildings, public buildings, the central exhaust system added ventilation. Usually applied to consider replacement windows and doors in new construction windows and doors design or renovation. 

 The Liaocheng Sunlight Stainless Steel Co., Ltd. is currently the only one specializing in the production of roof ventilation equipment manufacturers. In recent years, under the joint efforts of engineers and technicians, factory production of free electricity --- roof ventilation domestic specifications largest, most complete variety of manufacturers, one of which 300, 360, 450, with in residential buildings, villas floor roof ventilation mouth, 500, 600, 680 is mainly used for factory workshop and large public places ventilation exhaust. Full stainless steel body, cast aluminum support a special double-sealed bearings. The products sell all over the surface of the country, first class after-sales service. Windmill - wind pump fuel, no electricity, manufacture of fine, wind speed 1.67 m / sec, which can start. Tower fan blade diameter of 5-10 meters, nine kinds of specifications can be designed and manufactured according to different needs. Colorful weathervane is widely used in the park, the green band edge, the villas and corporate production environment, it can not only indicate the wind direction and speed level but also add a touch of dynamism and harmony to your environment. In the face of strong competition in the market, our factory always adhere to manufacturing quality products for the guidelines, which insists on integrity, excellent service up to maximum customer satisfaction contact: King Star Sales Tel :0635 -8,322,238 13,906,356,805