For standard 3-1/4 x 10 in duct. Damper spring controlled.
- Open/closing damper prevents outside elements from entering the vent
- Damper is spring loaded to keep damper closed when not in use
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Catalog
https://assets.unilogcorp.com/187/ITEM/DOC/Lambro_100001829_Catalog.pdf
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Line Drawing
https://assets.unilogcorp.com/187/ITEM/DOC/Lambro_100059500_Line_Drawing.pdf