The DI-PSP offers an innovative solution to deliver replacement air in the vicinity of the exhaust hood without affecting capture and containment. The double layer of perforated metal of the DI-PSP ensures a laminar air discharge pattern. The DI-PSP replaces traditional directional diffusers, like a 4-way, that can degrade hood performance if within ten feet.

The other DI-FUSE single layer of perforation offers high induction diffusion of general supply air to a building.

DI-RETURN is a single-layer perforated assembly used for return air applications.