Slot diffusers

USAire, Mud-in Linear Slot Diffusers, Slot Width, 100 Long

They can be specified as linear slot diffusers for ceilings or linear slot diffusers for sidewalls as they are available with special edge trims to complement

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fruit mania golden nights slot I don't get why linear diffusers aren't more common I've done only one house with linear mud-in supply and return in master bedroom