Anemostat model HU-4 air diffusers shall be furnished and installed where shown on the plans. The diffusers are to consist of four expanding and diverging hollow cones with closed beads with a minimum of four air paths placed within each other in such relationship that the discharged air is projected downwards from the supply duct or projection unit heater.

Provide Anemostat model DE-2 radial disk deflector for installation in the neck of the HU-4 diffuser, as scheduled. The disk deflector shall include hook rings for manual pole adjustment of the air discharge pattern from vertical projection to full hemispherical horizontal air distribution.

The air diffuser and optional DE-2 deflector shall be steel with baked-on Arctic white finish, or custom color as specified.