18"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 33.75"h] Return Grille Actual Filter Size – 29

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

+ Product Details Size - 20"w X 6"h is the size for the duct opening measurement only

Works for all Air Conditioning applications including Ductless Mini-Split

+ Product Details Size - 20"w X 12"h X 2"d (for duct opening measurement only)

Our Aluminum Ceiling Diffuser is not only a design marvel but also a practical choice for your HVAC system

18"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 33.75"h] Return Grille Actual Filter Size – 29+ Product Details Size 18"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 33. 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