T-Bar Drop Ceiling Lay In perforated diffuser is designed for 360° high volume air supply or return for commercial or large areas. It comes with molded R6 insulation with vapor barrier. It does not have a collar and needs a start or tab collar to connect the diffuser to the duct. The collar can be from 4 in. to 14 in. Dia.
- For air supply no change is needed, the center deflector forces air flow in 4-directions, for return grille please remove the circular piece of black rubber that is glued in the center of the diffuser
- For use as return grille please remove the deflector piece that is glued in the center of the diffuser
- For collar installation, you start by cutting appropriate size hole in the collar and choosing the start collar that will fit the size of hole; A 7 in. start collar will need 7 in. hole; start by bending every other tab on a start collar 90°; insert the remaining straight tabs into the hole that you cut and then bend the straight tabs 90° to the inside of the hole to hold the collar in place; we recommend using duct tape to seal around the connection from the start collar to the diffuser
- Made of steel and white powder coated for durability and smooth glossy finish
- If needed the white color is easy to paint over
- Outside dimensions are 23.75 in. x 23.75 in.









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