Tianjin spot acoustic ventilators sunshine soundproof ventilation prices 
 The sun sound insulation ventilation products are described in detail in ventilation, ventilation, while reducing or eliminating the noise function. Non-working state component weighted standardized sound pressure level (Dn, e, w) should be greater than 25dB, the 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 is up to domestic specifications, one of the most complete variety of manufacturers 
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