Contractor shall furnish and install Anemostat C-24 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 within the occupied zone within the limits of 20 to 50 fpm, and aspirate room air within the passageways in a volume up to 25 percent of 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 outer cone shall have an integral convex shaped anti-smudge rim. The required ceiling opening shall be no more than one inch greater than the diffuser inlet neck.

The air diffuser shall be steel, painted arctic white.