Old 11-16-2008, 07:07 AM
Join Date: Sep 2008
Location: delaware, USA
Posts: 12
Default spark arrestor vs. chimnet vent cap

what is the difference between a chimney cap and a spark arrestor? are they one and the same?
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Old 11-16-2008, 11:14 AM
Jed Jed is offline
Join Date: Apr 2008
Location: Bend, Oregon; West Coast USA
Posts: 428
Default Re: spark arrestor vs. chimnet vent cap


I think in practice, you end up doing both jobs with the same part at the top of your chimney.

These are two separate jobs: spark arrestor to keep sparks from the fire from leaving the scene and causing a problem: chimney cap to keep the rain and snow from washing soot back down the chimney, but they are commonly built into the same part.

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Old 11-16-2008, 01:00 PM
Join Date: Jan 2008
Location: FL
Posts: 62
Default Re: spark arrestor vs. chimnet vent cap

A spark arrestor incorporates a perforated surface of some sort. The perforations job is to hold back particulates, this would include sparks. Some are woven metal screen and others are perforated plate. The screen offers more open area, is less expensive and has less affect on the draft. Some chimney caps incorporate this feature others do not, spark arrestors also are made without a chimney cap funcion
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Old 11-16-2008, 10:36 PM
nissanneill's Avatar
Il Pizzaiolo
Join Date: Apr 2007
Location: Adelaide, South Australia
Posts: 1,883
Thumbs up Re: spark arrestor vs. chimnet vent cap

HI Jlaw,
I built a spark arrester on my chimney for no other reason that if the council or other authorities ever query my oven , I at least have done the right thing as I live in the foothills and in a fire danger area.
I have never seen any sparks run up let alone out the top of the 10 foot flue.
See it at:

http://www.fornobravo.com/forum/f21/...ster-2333.html (Neill's spark arrester)

Prevention is better than cure, - do it right the first time!

The more I learn, the more I realise how little I know

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