The EffectiV HVAC (http://effectiv-hvac.com) PLAY diffuser is the only air diffuser that truly allows for full horizontal adjustment of the airflow. Each round sector can independently rotate 360 degrees. The PLAY is very easy to adjust from the face and without tools. Solutions to air conditioning drafts and other air draft problems were very limited so far and solving one problem would often create new ones. Not anymore, we can finally prevent AC wars in open offices and other buildings!
For more information about the PLAY, go to http://effectiv-hvac.com/