I plant a low-noise wind VAV box, using advanced DF series low noise double suction centrifugal two-speed exhaust fan wind chassis, fitted with a coarse air filter, in effect filter or sub-efficient filter, put in the (insulation) sound-absorbing panels wind HTFC-1 tank chassis, and use the damping rubber mats and other wind chassis, with low noise, small vibration, small size, light weight, air volume, variable-speed, variable air volume, easy to operate, flexible adjustment site easy accessibility features. The new air unit long-term use due to electrostatic adsorption of dust in the air causes of the air, the dust is easy to breed bacteria wind chassis manufacturers, affect the appearance and health. Recommend regular (six months) by a professional cleaning outlet. Long-term use of the return air filter in the air due to electrostatic reasons dust in the return air filter online gathering dust easy to breed bacteria, affect the appearance and health. Recommendations made by the professionals on a regular basis (six months) with a special cleaning agents and cleaning air filter. Ultra low-noise wind chassis tank chassis _ _ Hedong wind Chenyu air conditioning provided by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chenyu air conditioning and you hand into the brilliant, for a better future!