20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 21.75"w x 21.75"h] 10" Round Duct Pipe Actual Filter Size – 35

Actual Filter Size – 35 3/4"w x 5 3/4" x 1"

[Outer Dimensions: 20

this grill will provide the design aesthetic you're looking for

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height -

+ Product Details Size - 18"w X 4"h is the size for the duct opening measurement only

20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 21.75"w x 21.75"h] 10" Round Duct Pipe Actual Filter Size – 35+ Product Details Size 20"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 21. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never