||Vacu Stack Chimney Cap
Wind Resistant / Anti Downdraft Cap
for masonry, brick & clay liner applications
options to fit the 3 most common clay flue sizes. Please call us
to order any other size.
Combo priced options include and ship with...
Vacustack, adaptor and screen.
The Vacu-Stack Chimney Cap solves the two wind related
chimney problems -- wind induced downdraft and dynamic wind loading. The
streamline flow of the wind around the Vacu-Stack prevents wind from
blowing into the chimney -- even when the wind is deflected downward.
The Vacu-Stack creates a venturi that causes flue gases to flow up and
out of the chimney.
||There are no moving parts to bind or
Vacu-Stacks are tested by an independent testing laboratory. In the
absence of wind, Vacu-Stacks provide a more than adequate passage for
exhausting flue gases. The open spaces in a properly sized Vacu-stack
are several times larger than the flue opening. The unique design of the
Vacu-Stack gives excellent protection from downdrafts caused by wind,
where other devices often fail.
quality austenitic stainless steel, T-304, guarantees superior
durability for long service life. All fasteners and hardware are also
made of stainless steel for complete corrosion protection. Ribbed
construction provides extra strength and reinforcement. Exposed edges
are hemmed for ease of installation. The Vacu-Stack chimney cap is made
in the USA.
Masonry Chimney Installation:
is required for square, round or rectangular masonry chimneys. A patented fastening
device secures the adapter to the chimney flue. Vacu-Stack caps fit inside
the adapter collar. Silicone caulking must be applied to seal seams and
|Sizing for a VacuStack
Masonry, brick or clay liners need to be measured by its INSIDE
Older "clay" liners and newer ceramic liners will vary
in their inner and outer measurements.
Measure and give us a call if
you would like help sizing for a Vacu Stack.
|Typically... a standard size clay liner
||will have an inner measurement of
||to as big as...
|8x8, sometimes called a 9x9
||6" x 6"
||7 1/2" x 7 1/2"
|12x12, sometimes called a 13x13
||10" x 10"
||11 1/2" x 11 1/2"
|8x12, sometimes called a 9x13
||6" x 10"
||7 1/2" x 11 1/2"
||6 x 10
AD - Stainless Steel Adaptor Plate
Used for adapting a VSS Vacu-Stack on a square,
oval, or rectangular masonry