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