20"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 15.75"h] steel Insulation density is 30kgs/cbm = MFACRA88W1 Condensate Pump Product Details Size 20
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Description
20"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 15.75"h] steel Insulation density is 30kgs cbm = MFACRA88W1 Condensate Pump Product Details Size 20 Insulation density is 30kgs cbm = 0 very easy to do