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