3-cone air diffuser is for T-Bar, Drop Down, Lay in ceilings. 2-1/2 in. high grooved collar makes installation easier and faster. Optional damper sits in the groove. R6 insulation with vapor barrier reduces condensation. 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. diameter.
- Distance between the cones is adjustable and works well with variable air flow patterns
- 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
- Surface mounted or suspended grid system installation
- Made of steel and white powder coated for durability and smooth glossy finish
- Need the white color is easy to paint over
- Outside dimensions are 23.75 in. x 23.75 in.











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