1.Square type and rectangular type
2.Four side blow, three side blow and two side blow

Square diffuser and rectangular diffuser.
Square diffusers have four-side blow, three-side blow, two-side blow, etc. The three-side diffuser is suitable for ceilings near to walls, two-side diffuser is suitable for ceiling near to wall corner. customer can choose them freely.
The diffusers are made of alluminium, being anode oxidation or baked paint, static plastic spraying.
The diffusers can be mated with adjustable valve or filter net.