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