18 in. Width x 30 in. Height - hvacpremiu.shop

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18"W X 30"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 19.75"W X 31.75"H]

$51.99 $57.99

18"W X 30"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 31.875"H]

$84.00 $93.99

18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Grille

$84.99 $94.00

18" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 32 5/8"]

$94.00 $104.99

30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter

$94.00 $104.99

18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter

$99.00 $110.00

18"W X 30"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 19.75"W X 31.75"H]

$121.00 $134.99

18" X 30" Or 30" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 31.75]

$156.99 $174.00

18"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 31.75"h]

$180.99 $201.00

18" X 30" Steel Return Air Filter Grille for 1" Filter - Fixed Hinge - [Outer Dimensions: 20 5/8" X 32 5/8"]

$198.00 $220.00