plenum slot

linear slot diffuser with plenum box   Dan linear slot diffuser plenum box sizing

Metal Zinc's Linear Diffuser Box is designed to fit with various sizes of grills and supply ducting to maximize air flow

Transition that provides means to connect round duct to linear diffusers; Designed for use with ALL FreeFlo, ProJet, and SLAD series linear slot diffusers Plenum box type VK

a plug or slot weld is what type of weld The round outlet is typically on the side of the plenum since the top is narrow We do not sell them, but you can buy plenums for linear diffuses from Home › 2 Slot - Double Slot - Linear Slot Diffusers - White › plenum box BUILDMART - 36 Inch Plenum Box for [36 Inch Linear Slot Diffuser