Ceiling Diffusers

Ceiling diffusers for commercial and residential HVAC — perforated face, T-bar lay-in and 4-way steel models from Hart & Cooley, TRUaire, AirGuide, Tuttle & Bailey and Shoemaker. Every listing shows the nominal size, face style and finish.

Size by the module or the duct collar, not by the faceplate you are pulling down. T-bar lay-in diffusers drop into a 24x24 or 24x12 grid module; perforated and 4-way models mount to a hard duct collar and are ordered by neck size. Measure the collar before you order and confirm the throw pattern suits the room.