28"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 11.75"h] w36h36 Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 27 3/4" x 1"

actual front end outer dimensions are approximately 28 5/8" width X 24 5/8" height

For 14" Round Duct Opening - Spiral or Flex

Design – Easy unrestricted air flow for your HVAC system

actual front end outer dimensions are approximately 7

28"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 11.75"h] w36h36 Actual Filter Size – 33+ Product Details Size 28"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 11. 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