Flowline High Capacity Linear Slot Diffuser · Model 35SST VAV · External Louvre A member of the Nailor Industries International group. Stocked Sizes. . Clear. Mitered Corner for Flowbar Diffusers. FlowLine is a custom architectural linear slot diffuser system designed to integrate supply and return air openings into interior commercial buildings. Nailor Linear Diffusers and Bar Grilles are engineered and designed to satisfy high performance applications that require an aesthetically pleasing design. Nailor Linear Diffusers and Bar Grilles are engineered and designed to satisfy high performance applications that require an aesthetically pleasing design. Flowline Diffuser Vertical. The Flowline™ FLV Series continuous slot diffuser is designed for. © Advanced Air (UK). FL-TZ. Architectural Slot. Flow Cross for Flowbar Diffusers. FBMC. The Flowline™ FLV Series continuous slot diffuser is designed for both ceiling and high sidewall applications and provides total air pattern control flexibility. FBP Architectural Linear Diffuser, Aluminum, 1" Slot. Flowline™ diffuser assuring proper dimensional layouts for simple diffuser installation. Choose an option, 96" Long x 1 1" slot. Categories: Air Distribution, Linear Diffusers SKU. FlowLine is a custom architectural linear slot diffuser system designed to integrate supply and return air openings into interior commercial buildings. Call Now To Order.