Airpro Industries India

18 x 18 Inch Square HVAC Diffuser
Fundamentally, in a return air diffuser, the air flows back into the ductwork system. In exhaust air diffuser, the air flows out of the ductwork system. Vent size – On many occasions, you'll realize the size of the vent in return air diffusers tends to be relatively larger than those in the exhaust air diffuser.

Round diffusers are generally installed on ceiling tiles or exposed ductwork using round ducts for supply and return air HVAC applications. Round diffusers are available with black powder coated butterfly damper for supply air applications.