Fabric drop-down diffusers

A drop-down diffuser comprising:

• a first wall defined by a first circular perimeter, the first wall to be planar, the first wall having an opening for a supply air inlet;
• a second wall defined by a second circular perimeter, the first wall to be spaced apart from and face the second wall with an air chamber defined therebetween;
• and
• a third wall to extend between the first and second walls, the third wall to be curved to extend around the air chamber along the first and second circular perimeters associated with the first and second walls, the third wall corresponding to a pliable fabric sheet.

A drop-down diffuser comprising:

• a first hoop having a first diameter;
• a supply inlet adjacent a center of the first hoop, the supply inlet to enable air from an air duct to pass through the first hoop;
• a second hoop having a second diameter, the second diameter smaller than the first diameter, the second hoop spaced apart from the first hoop;
• and
• a fabric sheet to extend between the first and second hoops, the fabric sheet to be coupled to the first hoop along a first perimeter of the first hoop, the fabric sheet to be coupled to the second hoop along a second perimeter of the second hoop, both the second hoop and the fabric sheet to be suspended from the first hoop.