16"W X 18"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 17.75"W X 19.75"H] Grilles Efficient Airflow Design: The slots MFACRA88W1 Condensate Pump Product Details Size 20
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Description
16"W X 18"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 17.75"W X 19.75"H] Grilles Efficient Airflow Design: The slots MFACRA88W1 Condensate Pump Product Details Size 20 Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions + Product Details Size – 12"w X 8"h is the size for the duct opening measurement only