6" Air Insulated Vacu-Stack

This 6" Vacu-Stack for air-cooled class-A chimney cures most wind-related problems. Obstacles such as large trees or buildings can deflect the wind down the chimney flue causing draft issues. When the wind hits the Vacu-Stack, draft is increased in proportion to wind speed. It's made of 26-gauge 304 stainless steel and carries a Lifetime Warranty.