The Vacu-Stack Is The Best Solution For Wind Induced Downdraft.
Stops wind from blowing into the chimney.
Prevents “wind induced downdraft” 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.
100% Stainless Steel Construction
Easy To Install, Self-adjusting Spring Fit
Wind Tunnel Tested
Tested To UL 103 Standard
Lifetime Limited Warranty
Note: For Class A, Single Wall and Masonry Chimneys.
A Masonry Adapter, purchased separately, is required when installing a Vacu-Stack in a masonry chimney. (Item# 1244 & 1216 Include Masonry Adapters.) Masonry Adapters Include Fasteners.