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