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