8" X 8" Outdoor Return Air Grille – For Outdoor Use - HVAC Vent Duct Cover Diffuser – [1.0mm Polished Aluminum] [Outer Dimensions: 9.75w X 9.75h] w18h18 width: 20px

width: 20px

+ Product Details Size – 26" x 30" or 30" x 26" is the size for the duct opening measurement only

+ Product Details Size – 26"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 38"w X 14"h is the size for the duct opening measurement only

These are airflow control components made to connect to supply grilles of the drop ceiling

8" X 8" Outdoor Return Air Grille – For Outdoor Use - HVAC Vent Duct Cover Diffuser – [1.0mm Polished Aluminum] [Outer Dimensions: 9.75w X 9.75h] w18h18 width: 20px8" X 8"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 9. 75 Width X 9. 75 Height SEE IN DESCRIPTION HOW TO MEASURE A GRILLE PROPERLY 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