3" Diameter Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 5" Diameter
Made of Strong Durable ABS Plastic, Will Last Forever & NEVER RUST.
Improved Airflow Dynamics Long Neck Body- Reduced Noise Design - Integrated Spring Fasteners.
Easy Removal for Cleaning.
Adjustable Air Flow.
Why HVAC Premium?
You may think of grilles and registers as a generic component of the ventilation system in your house. But they are also the most visible representation of you air system.
With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests.
How To Measure A Grille Overall Size:
Measure the size of the air duct/drywall opening. Do not measure the overall size of the register itself, only measure the "hole" in the wall/duct. Every grille has a front end frame, that will overlap at wall joint.
Total outer size of this grille is; listed size +2" diameter.
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Related to the 3" Circular Round Plastic HVAC Supply Grille Air Diffuser -Vent Duct Cover [Outer Dimensions: 5"]