Contractor shall furnish and install Anemostat C-27 air diffusers as manufactured by Anemostat Products Division at each point indicated on the plans. These air diffusers are to consist of four expanding and diverging hollow cones with closed beads. The cones shall be arranged to provide a minimum of three air paths, which shall simultaneously diffuse the air in the occupied zone within the limits of 20 to 50 fpm, and aspirate room air into the passageways in a volume equal to 20 to 30 percent of the specified discharge volume.

Turning the smallest cone shall raise or lower the next to largest cone to change the air discharge pattern from horizontal to downward projection discharge. The inner assembly shall be removable from the outer cone after release of a spring lock by a twist of the inner cones.

The air diffuser shall be steel, painted arctic white.