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TRUaire’s T-Bar Step Down Supply Diffusers go by many names, including cone diffusers, Lay-in diffusers, and T-Bar diffusers. The term “T-Bar” comes from the shapes of the railing that hold the ceiling tiles in a drop ceiling. The railing forms a grid of squares and T-Bar diffusers are designed to fit, or “lay-in” to those grid squares. The “cone” shape of the diffuser allows for maximum volume of airflow into the air-conditioned space. These Step Down Supply Diffusers feature a pristine white powder coat finish, extra heavy gauge steel, Seismic support tabs, and TRUaire’s exclusive Super Collar to prevent any flex duct slippage or buckling under the pressure of a zip-screw gun. Options include choice of a two or three cone diffuser, choice of collar size, insulation, and either a SmoothGlide butterfly or radial damper.

The 2003 Series is a 2 × 2 ft T-BAR 2 Cone Step Down Diffuser. The “cone” shape of the diffuser allows for a maximum volume of airflow into the air-conditioned space.

The 2003 Series is a 2 × 2 ft T-BAR 2 Cone Step Down Diffuser. The “cone” shape of the diffuser allows for a maximum volume of airflow into the air-conditioned space.

TRUaire’s T-Bar Return Grilles were created with the help of our close relationships with contractors who know the industry well. These T-Bar return grilles cut installation times by utilizing a unique plenum frame design. Each model features SmoothGlide Technology, and can come with or without the duct board. Options include choice of perforated steel, acrylic egg-crate, or aluminum egg-crate, and each model is also available in full-size T-Bar configurations, including half and double T-Bar dimensions. The perforated steel Return Grille is the only model available as a Supply Diffuser, employing the stamped deflector.