What constitutes commercial grade grilles, registers, and diffusers (GRD)?Ī commercial grade product should have a complete set of technical data that would assist architects, engineers, and HVAC professionals to select the proper products for their projects. It is crucial to know your HVAC system total or static pressure when choosing the proper GRD for optimal performance. * Flow rate (CFM) and static pressure (in.wg) are interrelated. Shipping to USA takes 2-7 business days after dispatch (depends on delivery address).
Fastening must be done on the inner border sides for an aesthetic appearance.
