8'' TDW Vacu-Stack for Air Cooled Chimney

Item Code: 5IP-VSS-08TDW

Availability: Available, Ships in 2 business days.

List Price: $251.18

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You Save : $39.31 (15.65%)

Your Price: $211.87 Free Shipping*
The Vacu-Stack Air Cooled Chimney Cap is the best solution for wind induced downdrafts. It is designed to fit double or triple-wall, air-insulated, factory built chimneys to stop wind from blowing into the chimney regardless of the wind direction. By accelerating air flow around the Vacu-Stack, flue gasses are forced to flow up and out of the chimney.

This Vacu-Stack Air Cooled Chimney Cap features a unique design that actually increses the draft when the wind hits it as opposed to deflecting it down the chimney and overpowering the draft. A special large 16" bottom collar rests underneath the cap to keep rain from entering the air-insulated chimney and maintain the proper internal venting that is required.

View the Vacu-Stack Guide.

Vacu-stack Sizing

Additional Information
  • 304 Stainless steel construction
  • Measures 8" round inside flue size
  • Designed to fit double or triple-wall, air-insulated, factory-built chimneys
  • 16" Bottom collar to keep out rain and maintain proper internal venting required
Additional Information

May be painted only with paint made for painting stainless steel.

Top Picks Yes
Brand Vacu-Stack
Model VSS-08TDW
Shipping Weight (lbs) 12.0000
Actual Weight (lbs) 12
Product Type Draft Inducers
Diameter 8 Inch
Material Stainless Steel
Manufacturers lifetime warranty

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Customer Reviews

Posted: 10/28/2013

Reviewer: bbailey

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Vacu-Stack 8" for Triple Wall

I recently installed this item and unfortunately found that it doesn't work any better than the cap that I replaced, that was not designed specifically to block wind. The only time that I have a problem with downdrafts, is when the wind is blowing from the north or north-east. This doesn't seem to work for me.

Questions on 8'' TDW Vacu-Stack for Air Cooled Chimney

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  • From Steve at 10/9/2012 7:54 PM
    • I have a mobile home with a fireplace that occasionally the smoke comes into the room. I need a draft inducer to eliminate the problem. I measured the outside circumference today and came up with 40 inches, which translates to 12.735 diameter. I did not measure the flue pipe width and am guessing it is 8 inch. Is 8 inch the industry standard for that outside chimney circumference??
    • There is no industry standard. What you need to measure is the outside and inside diameter of the chimney pipe. It sounds like you might have 8". Run a tape across the chimney with the cap off and check your size. If your fireplace smokes occasionally and especially on windy days this cap should help. Typically a fireplace will use air cooled chimney pipe and this cap is designed to fit that type of pipe. An 8" inside diameter air cooled chimney pipe will have like 12" or more outside diameter and can be identified by three walls of pipe; outer, middle, and inner. I hope that helps. Robert
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