20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w20h20 Applications – The snap on

Applications – The snap on system makes for easy installation and will prevent the seam from coming apart while also preventing air leakage making your HVAC system more energy efficient and in turn

+ Product Details Size – 4"w X 14"h or 14" x 4" is the size for the duct opening measurement only

5" height x 11

compatible with duct 18" | 5-Pack of 2' pipe – 10 foot length when connected – 26 gauge thick & made of thick & durable galvanized sheet metal

It is compatible with duct 5"

20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w20h20 Applications – The snap on+ Product Details Size 20"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 20. 5"h] Actual Filter Size 19 3 4"w x 17 3 4" x 1" High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location Sidewall and ceiling. Design Heavier gauge than needed,