30" X 10" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included *[Outer Dimensions: 32 5/8" X 12 5/8"] Supply Grille actual front end outer dimensions 18" Round Duct Pipe Fixed 45 horizontal blades LO1810

actual front end outer dimensions are approximately 20 5/8" width X 32 5/8" height

Actual Filter Size – 29 3/4"w x 15 3/4" x 1"

+ Product Details Size – 18"w X 26"h is the size for the duct opening measurement only

but you’ll appreciate the benefits over a long period of time

+ Product Description The Clear Plastic Thermostat Guard is designed to provide secure protection for your thermostat while maintaining an attractive

30" X 10" Steel Return Air Filter Grille for 1" Filter Removable Frame * Filter Included *[Outer Dimensions: 32 5 8" X 12 5 8"] Supply Grille actual front end outer dimensions 18" Round Duct Pipe Fixed 45 horizontal blades LO1810 actual front end outer dimensions are approximately 20 5 8" width X 32 5 8" height Actual Filter Size – 29 3 4"w x 15 3 4" x 1"