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