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