Linear slot diffusers

Linear slots get used mostly on perimeter spots, usually above large window areas for entrainment that is, so the supply air can mix with whatever heat load

So a Linear Slot Diffuser is an AC Vent Cover that is long and skinny and diffuses the air by manipulating the blades

linear slot diffusers HVAC Return Air Duct Vent Installation Dave & Wini DIY Projects 6600 Series: 6610 12-1

linear diffuser vs slot diffuser The Linear 2 Slot Vent 600mm in white includes 150mm Adaptor Box For Easy Installation and Connection To Ducting See Listing For Installation Guide