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Supply air diffuser(HVAC,Air grille ,Air diffuser,Air register,Double deflection supply air register)F-DB-A, the new adjustable side air supply grille, adopt air-driven theory and industrial design based on the general supply air grille. The new aluminum grille has two models: double-layer(SB-A) and single-layer(DB-A).Generally, for double-layer products, the short blades are in the face while long blades in the back; for single-layer products, blades are parallel to the short side. To reduce the flow resistance and noise, blades can be streamlined design.The heart frame can be unloaded by varying degrees according to different product size.This makes the product easy to install and clean, and adapt to central air-conditioning System.Standard Size(mm) as bellow : SPEC (NECK SIZE)2002503003504004505006007008009001000100************150************200************250***********300**********350*********400********450*******500******600*****700****800***900**1000*REMARK:Dimensions,colors,thickness,finished,designs and other specification can be customized according to customers' request. We sincerely welcome you to contact us for business.FOSHAN GREENAIRSYS HVAC EQUIPMENT CO.,LTD