The Duct Increaser/Reducer connects 3 in. – 4 in. ducts together. It is ideal for bathroom fan exhaust applications. Product width is 4 in.
- Made of polypropylene
- Used when your exhaust port or exhaust hood needs to be increased from 3 in. to accommodate a 4 in. duct
- Consult your local building codes for approved installation practices
- Lightweight design










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