Mechanical properties of air should be checked before 1. Installation. a) moving parts outlet single Grille pictures, requires action freely, damping even single Grille price, no card dead and loose. b) an adjustable or removable baffle product, adjusted as required to facilitate the demolition, reliable, no loose after positioning. 2. outlet outer decorative surface should be smooth, diffuser ring should be evenly distributed, the color should be consistent, no obvious scratches and indentations. 3. outlet tolerance values ??should be consistent with the provisions of Table 2. Aluminum outlet Classification 1) Alloy double Grille; 2) aluminum single Grille; 3) aluminum fixed outlet strip; 4) from the vertical louvered aluminum air; 5) aluminum diffuser; 6) adjustable spherical aluminum outlet; 7) aluminum swirl diffusers; 8) aluminum egg Grille; 9) aluminum ceiling inspection door, access door; 10) Aluminum outlet Xinhua new checkpoints; 11) aluminum alloy hinge-type outlet; 12) aluminum facades rain (water) Grille; 13) Aluminum 0 degree / 30 degree line-shaped outlet; 14) aluminum trough-shaped diffuser. Single Grille selection _ Wuhan Han Wei Li Yuen (certified) _ Hannan single Grille provided by the well-being of Equipment Co., Ltd. Wuhan Han Wei Li Yuen. Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) is a leader in Wuhan, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In Wuhan Han Wei Li Yuen leadership with the staff warmly welcome all inquiries negotiations to create Wuhan Han Wei Li Yuen better future.