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