The Flowline™ FLV Series continuous slot diffuser is designed for both ceiling and high sidewall applications and provides total air pattern control flexibility. Call Now To Order. The Flowline™ FLV Series continuous slot diffuser is designed for. 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. Flowline Diffuser Vertical. Stocked Sizes. Architectural Slot. FL-TZ. 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. Clear. FBMC. Flowline High Capacity Linear Slot Diffuser · Model 35SST VAV · External Louvre A member of the Nailor Industries International group. FlowLine is a custom architectural linear slot diffuser system designed to integrate supply and return air openings into interior commercial buildings. © Advanced Air (UK). Flow Cross for Flowbar Diffusers. Mitered Corner for Flowbar Diffusers. 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.