Grilles, registers, and diffusers are essential components of an HVAC system. Grilles are generally found on walls or ceilings and protect air intake openings and ensure unrestricted airflow, while registers are positioned on the outlet side of the ductwork and are responsible for delivering conditioned air into the living space and providing control over airflow direction. Diffusers are typically installed in ceilings or walls and are designed to provide a comfortable and balanced airflow pattern that disperses conditioned air evenly in multiple directions. When it comes to selecting grilles, registers and diffusers for an HVAC system, there are a lot of things to consider. You want to make sure you choose a product that is durable, efficient, and aesthetically pleasing and improves the airflow and energy efficiency of a home.