30" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 18in diameter listed size +1 MFACRA88W1 Condensate Pump Product Details Size 20
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30" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling 18in diameter listed size +1 MFACRA88W1 Condensate Pump Product Details Size 20 listed size +1 + Product Details Size 18"w X 10"h is the size for the duct opening measurement only