28"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 37.75"h] 2-Way Deflection also referred to as T-Bar

also referred to as T-Bar or Lay-in system

Actual Filter Size – 19 3/4"w x 15 3/4" x 1"

actual front end outer dimensions are approximately 32 5/8" width X 26 5/8" height -

Actual Filter Size – 15 3/4"w x 27 3/4" x 1"

actual front end outer dimensions are approximately 14 5/8" width X 32 5/8" height

28"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 37.75"h] 2-Way Deflection also referred to as T-Bar+ Product Details Size 28"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 37. 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