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  #21  
Old 07-24-2013, 05:25 AM
Peasant
 
Join Date: Jul 2013
Location: Australia
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Default Re: newbie need advise for my oven

Quote:
Originally Posted by david s View Post
They will conform to the spherical surface better if you halve them.
If they conform is that a good thing or bad? Do you mean it will create more mess to take heat into and by that make the oven not efficient? Sorry if my understanding is poor

I bought the ceramic blankets today. I will cover the dome with the blankets and then maybe cut 'em to half and extra insulate the dome

With the ceramic blankets I think I'm good to go!

Bought the refractory concrete and the rendering mix too! Can't wait to get my hands dirty
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  #22  
Old 07-24-2013, 01:08 PM
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Default Re: newbie need advise for my oven

If you halve the bricks you should end up with a more spherical form to render over the final coat (presuming you are intending an igloo rather than a dog house). Love to see some photos.
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  #23  
Old 07-28-2013, 11:51 AM
Peasant
 
Join Date: Jul 2013
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Default Re: newbie need advise for my oven

Hi again,
A quick question but I'm re-watching demos of constructing a barrel shape oven, and I noticed all of them place the chimney inside the oven rather than outside like the pompeii shape. Which way should I do it? I was gonna do it outside..
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  #24  
Old 07-28-2013, 01:29 PM
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Default Re: newbie need advise for my oven

Outside is better IMO. Outside makes it a crossdraft, inside makes it an updraft. Crossdraft produces more even heating and more efficient. Check out Lburou's build for cross draft. If you put it inside the oven you will need a damper on the flue.This configuration does not have an entry to hav to work past, check out Brickie in Oz's build.

Last edited by david s; 07-28-2013 at 01:37 PM.
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  #25  
Old 07-28-2013, 08:58 PM
Peasant
 
Join Date: Jul 2013
Location: Australia
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Default Re: newbie need advise for my oven

Ok I see. And also I don't get the damper part.. if you twist the damper on, won't the smoke just escape thru the front door?
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  #26  
Old 07-28-2013, 09:11 PM
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Default Re: newbie need advise for my oven

Yes, if the damper is fully closed that is exactly what will happen. But you open it fully to start, then partially close it as the heat builds up, then fully close it for retained heat cooking.
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  #27  
Old 07-28-2013, 09:27 PM
Peasant
 
Join Date: Jul 2013
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Default Re: newbie need advise for my oven

Will it be still be useful on an outside chimney or have no functionality? Just chucking more labor into the project haha
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  #28  
Old 07-28-2013, 09:52 PM
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Default Re: newbie need advise for my oven

A damper on the flue that is outside the oven is not really of much use because it draws both from the oven and the outside. When the door to the oven is placed either partially closed or fully closed it acts as a damper to the outer flue.
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  #29  
Old 07-29-2013, 08:48 PM
Peasant
 
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Default Re: newbie need advise for my oven

Last night I was lying the bricks on top.. I think my oven is too long what do you think?
It's 122 cm long and 61cm wide


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Do you think the distance to the chimney will be too long? The fire will be in the back..
My oven looks like a coffin..
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  #30  
Old 07-29-2013, 08:56 PM
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Default Re: newbie need advise for my oven

Quote:
Originally Posted by gonzo420 View Post
Last night I was lying the bricks on top.. I think my oven is too long what do you think?
I don't know what to think. What the hell are you building? The good thing is that it is brick and it will probably stand and last forever...
brickie in oz likes this.
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