16"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 11.75"h] Compatible with Duct 6" + Product Details Operating Temperature

+ Product Details Operating Temperature From -40°F To +248°F [-40°C To +120°C]

ISO Supply Diffusers perform efficiently with air loadings of 6 to 30 air changes per hour (based on 10 ft

actual front end outer dimensions are approximately 36 5/8" width X 28 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 26" or 26" x 8" duct opening (measured at the opening)

+ Product Details Size - 12"w X 28"h is the size for the duct opening measurement only

16"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 11.75"h] Compatible with Duct 6" + Product Details Operating Temperature+ Product Details Size 16"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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