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