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