24"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 19.75"h] Compatible With Duct 12in + Product Details Size -

+ Product Details Size - 36"w X 32"h is the size for the duct opening measurement only

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This Thermostat from Bramec will fit almost any thermostat

Actual Filter Size – 13 3/4"w x 11 3/4" x 1"

24"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 19.75"h] Compatible With Duct 12in + Product Details Size -+ Product Details Size 24"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 19. 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