18"W X 36"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 37.875"H] 14in diameter All year round solution - Drop Ceilings / Aluminum The set includes a FG1836 HP-1

All year round solution - Get the hot air out during the Summer Months

14" x 3" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

+ Product Details Size - 18"w X 10"h X 2"d (for duct opening measurement only)

Actual Filter Size – 35 3/4"w x 21 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 18" or 18" x 8" duct opening (measured at the opening)

18"W X 36"H [Duct Opening] ALUMINUM RETURN GRILLE EASY AIR FLOW LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 37.875"H] 14in diameter All year round solution Drop Ceilings Aluminum The set includes a FG1836 HP 1 All year round solution Get the hot air out during the Summer Months 14" x 3" Decorative Wood Air Vent HVAC Duct Cover Grille Polished Finish Red Oak Wood 2 Way Air Direction