Anemostat Model SPT Punkah style spot diffuser shall be furnished and installed where shown on the plans. The diffuser shall consist of a ball & socket arrangement and shall provide means for directional control of the supply air in both the horizontal and vertical planes up to a 75 degree total angle. 

The spot diffuser shall be constructed of machined aluminum assembled to the outer frame without the use of rivets, screws, or welding. The mounting frame shall include gaskets around the perimeter to prevent leaks and smudging between the mounting surfaces and the frame. The supply outlet shall also include seals between the ball and mounting frame to prevent leaks.

The diffusers shall be provided with the appropriate frame for the installation shown. Provide panel mounted diffusers, either 2 or 4 per panel, of the sizes indicated and as scheduled. The mounting panels shall be satin polished stainless steel material.

An integral volume control damper shall be included with each diffuser to change the effective discharge area of the supply diffuser, and shall be operable from the face of the diffuser by rotating a knurled knob.
 
The finish shall be natural anodize, or painted with a baked-on custom color as scheduled.