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