36"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 29.75"h] white 4" X 12" Brass Victorian Height_16in RG1612AL Product Details Size 14

4" X 12" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

Actual Filter Size – 27 3/4"w x 21 3/4" x 1"

actual front end outer dimensions are approximately 34 5/8" width X 28 5/8" height

Easy clean Healthy air flow for your HVAC system - noise free components - no vibrating louvers etc

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 20" OR 20" x 30" duct opening (measured at the opening)

36"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 37.75"w x 29.75"h] white 4" X 12" Brass Victorian Height_16in RG1612AL Product Details Size 14 4" X 12" Brass Victorian Floor Register Grille Modern Contempo Decorative Grate HVAC Vent Duct Cover Brass Plated Actual Filter Size – 27 3 4"w x 21 3 4" x 1"