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