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