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. 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. Flow Cross for Flowbar Diffusers. Flowline Diffuser Vertical. Flowline™ diffuser assuring proper dimensional layouts for simple diffuser installation. Clear. Stocked Sizes. Architectural Slot. The Flowline™ FLV Series continuous slot diffuser is designed for. © Advanced Air (UK). 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. Choose an option, 96" Long x 1 1" slot. FBP Architectural Linear Diffuser, Aluminum, 1" Slot. FL-TZ. Categories: Air Distribution, Linear Diffusers SKU. Call Now To Order. FlowLine is a custom architectural linear slot diffuser system designed to integrate supply and return air openings into interior commercial buildings. FBMC.