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