In commercial buildings, such as office buildings, medical facilities, restaurants, supermarkets, schools, and department stores, the interior air quality is controlled by sophisticated HVAC systems which deliver the air through a series of ducts and vents. When the air finally enters the interior space, it does so through air diffusers that directs the flow of air so that the entire space is heated or cooled, depending on the season. As such, quality HVAC diffusers play an integral role in a building's energy efficiency and overall comfort level.