30" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Copper Coil-Insulated Line Set And is classified as Class

And is classified as Class 1 Fire Proof - B1

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actual front end outer dimensions are approximately 31

order a 14x20 grille

actual front end outer dimensions are approximately 26 5/8" width X 8 5/8" height -

30" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Copper Coil-Insulated Line Set And is classified as Class+ Product Details Size 30"w X 20"h is the size for the duct opening measurement only, [Outer Dimensions: 32. 5"w X 22. 5"h] Actual Filter Size 29 3 4"w x 19 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,