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