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4'' Stainless Steel Vacu-Stack - VSS-4
Prevents wind-induced down draft regardless of wind direction (even downward). Accelerated air flow around the Vacu-Stack creates a venturi, causing flue gasses to flow up and out of the chimney.California residents please click on the link for information on Proposition 65 BEFORE purchasing.
Tags: Vacu-Stack, VSS4, 1204
