18" x 34" or 34" x 18" Cube Core Eggcrate Return Air Grille Supply Grille By simply measuring the width

By simply measuring the width or the length of the vent

+ Product Details Size - 20"w X 2"h is the size for the duct opening measurement only

4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

actual front end outer dimensions are approximately 22 5/8" width X 52 5/8" height

18" x 34" or 34" x 18" Cube Core Eggcrate Return Air Grille Supply Grille By simply measuring the width+ Product Details Size 18" x 34" or 34" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 35. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing