3″ to 4″ duct expander
SKU: BRN:463B
This duct increaser is designed to fit with our economy fan duct connector assemblies. It will work with 4″ round duct systems, is UL 94 compliant for flammability, and made in the USA.
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Description
This duct increaser is designed to fit with our economy fan duct connector assemblies. It will work with 4″ round duct systems, is UL 94 compliant for flammability, and made in the USA.