12" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Round Pipe + Product Details Size & RG2230 HP w4h4 const modal document

+ Product Details Size & Compatibility – 7" 90 Degree Flat Oval Elbow is compatible with duct 7"

Filter Size - 9

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 34" OR 34" x 20" duct opening (measured at the opening)

+ Product Details Size - 6"w X 30"h X 2"d (for duct opening measurement only)

+ Product Details Size – 18"w X 36"h is the size for the duct opening measurement only

12" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES Round Pipe + Product Details Size & RG2230 HP w4h4 const modal document + Product Details Size & Compatibility – 7" 90 Degree Flat Oval Elbow is compatible with duct 7" Filter Size 9