Abstract: A diffuser (10) is disclosed which is suitable for use in high security areas such as a jail. The diffuser is constructed of 10 gauge plate and defines an inlet passage (16) and a return passage (18). The return passage (18) can be utilized as a second inlet passage if desired. The air flow is through slots in a plate (34). A deflector portion (24) is curved over the slots to deflect the air in a first direction. In a second embodiment, a diffuser (100) is provided with slotted plates (102, 104) and a deflector (112) to discharge air in opposite horizontal directions.

Abstract: An air diffuser (10) is disclosed which has the significant advantage of employing only three subassemblies at the point of installation, including a base (12), a cone assembly (14) and a single bolt (16) to fasten the subassemblies together. Contoured rods (26, 28) are mounted with the base (12) to receive channels (48) on a series of brackets (46) to align the cone assembly and base. The brackets (46) forming the channels (48) also perform the function of securing a middle and lower diffuser cone together. A method of manufacture is also disclosed.