A capped lined sheet metal or one-inch fiber board duct features cut openings on its top surface for air transfer and sound attenuation. Specific material requirements, duct sizes, and opening dimensions are sized per drawings.
CAPPED LINED SHEET METAL OR 1" FIBER BOARD. SEE DRAWINGS FOR SPECIFIC MATERIAL REQUIRED CUT OPENINGS ON TOP OF DUCT FOR AIR TRANSFER AND SOUND ATTENUATION SEE DRAWINGS FOR SIZES OF DUCT AND OPENINGS
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