#1  
Old 06-19-2014, 10:35 AM
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Location: Norway
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Default Pompeii indoor ovnen build in Norway

This summer I'm starting to build an indoor pompeii oven in a garden house by my house.

I'm planning to use the 42" plans from this site but I've got into a problem I can't solve.

In the plans the chimney is carried by an arch.
I understand that this is not a problem with the short chimney an outdoor oven needs, but I need a 2.5 meters chimney (8 feet) and I'll guess the weight will be to much for the arch.

Does anyone here have a solution for this?

Kind regards,
Bjorn
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  #2  
Old 06-19-2014, 11:08 AM
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Default Re: Pompeii indoor ovnen build in Norway

Double walled metal flue?
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  #3  
Old 06-19-2014, 12:00 PM
Apprentice
 
Join Date: Apr 2014
Location: South Carolina
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Default Re: Pompeii indoor ovnen build in Norway

Like Tscarborough said, a double-walled chimney system is probably the way to go. Look at the DuraTech product catalog, they have all kinds of mounting options. Depending on the roof, you may only need a simple support bracket to tie the whole thing to the rafters. Only downside is the price.

Another option would be to do something custom. Look at GianniFocaccia's build, he has a stainless steel chimney that is supported by steel studs, IIRC. I don't know what you would have to do to get it through the roof without creating a fire hazard. The nice thing about the double-wall system is that it only requires 2" of clearance.
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Old 06-19-2014, 12:36 PM
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Default Re: Pompeii indoor ovnen build in Norway

You can look at Gulf's thread, he has a substantial brick chimney.

http://www.fornobravo.com/forum/8/mi...tml#post127324 (Mississippi 44")
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Old 06-19-2014, 12:56 PM
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Default Re: Pompeii indoor ovnen build in Norway

G'day
All the weight does not need to be taken by the arch as it can be fixed at the point that it penetrates the roof. As pointed out a double skinned chimney is the preferred type
Regards fave
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Old 06-19-2014, 02:15 PM
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Default Re: Pompeii indoor ovnen build in Norway

Nothing to add to the inputs above. Just interested in indoor builds. Please post pictures.
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Old 06-19-2014, 02:39 PM
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Default Re: Pompeii indoor ovnen build in Norway

I designed in a "settling chamber" for the smoke to enter before it goes up and out the chimney. This settling chamber provides a staging area for the smoke to gather before it gets pulled up the chimney. If there is no wind, it really doesnt matter. But if there is the slightest wind, then this settling chamber works great.

Attached is a rough picture of what I am talking about.

My clay chimney flue is 8" x 8" x 30" long and is fairly heavy. The flue rests on two pieces of steel angle, which rest on vertical brick walls.

There are many pictures of ovens on the FB website with black soot on the front of the oven, which is indicative of a poorly designed chimney.
Attached Thumbnails
Pompeii indoor ovnen build in Norway-chimney-flue.jpg  
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Old 06-20-2014, 07:13 AM
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Join Date: May 2010
Location: Norway
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Default Re: Pompeii indoor ovnen build in Norway

Thank you all for the helpful suggestions!

I'll go for the double walled steel chimney solution.
I found a supplier for these in Norway.

The 8 feet chimney with inner diameter of 7.5 inches is at 60lbs and that should be no problems to support.
The chimney is insulated with 2.5 inches of superwool and they also sell fireproof through the roof fittings.

Do you think the 7.5 inches is wide enough?

Last edited by Beron; 06-20-2014 at 07:16 AM. Reason: Typo
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Old 06-20-2014, 07:25 AM
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Default Re: Pompeii indoor ovnen build in Norway

Jeepipper : I liked your steel angle solution. Thanks for the drawing!
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Old 06-20-2014, 11:43 AM
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Default Re: Pompeii indoor ovnen build in Norway

Quote:
Originally Posted by jeeppiper View Post
I designed in a "settling chamber" for the smoke to enter before it goes up and out the chimney.
Jeepiper,

Where is the golden ratio applied, at the outer opening, or at the vent bottom?
The outer opening looks lower than the vent bottom.
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