The manufacturer of this flexible duct requires that supports be a minimum of 1-1/2" wide. The supports used here are only 1-1/8" wide. What's the difference? About 25%.
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Insufficient Duct SupportGallery: GalleryDescription: The manufacturer of this flexible duct requires that supports be a minimum of 1-1/2" wide. The supports used here are only 1-1/8" wide. What's the difference? About 25%.