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