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Fire box insulation???

 
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Philip



Joined: 10 May 2014
Posts: 20

PostPosted: Mon May 12 14 9:45 am    Post subject: Fire box insulation??? Reply with quote

What`s better for insulating a firebox on a reverse flow cooker the fireproof insulation or fire brick????


Phil.
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Smokin Mike
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Joined: 02 Dec 2008
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Location: Winston-Salem, NC

PostPosted: Mon May 12 14 10:25 am    Post subject: Reply with quote

Fire brick is a heat sink. It'll hold heat but doesn't really insulate. If you're looking for a thermal barrier then insulation is the ticket.
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Philip



Joined: 10 May 2014
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PostPosted: Mon May 12 14 11:58 am    Post subject: Reply with quote

Thanks Mike,

Any leads on a good source???

Phil.
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k.a.m.
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Joined: 12 Dec 2007
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PostPosted: Mon May 12 14 7:13 pm    Post subject: Reply with quote

McMaster Carr.
http://www.mcmaster.com/#high-temperature-insulation/=rxjn6a
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Tony
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Joined: 06 Feb 2005
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PostPosted: Mon May 12 14 8:29 pm    Post subject: Reply with quote

k.a.m. wrote:
McMaster Carr.
http://www.mcmaster.com/#high-temperature-insulation/=rxjn6a



Yeppers...That's the One! Wink ( They sell direct -credit card, open account,etc. )

Good Find Kevin!

Best Regards,

Tony Very Happy
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Smokin Mike
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PostPosted: Mon May 12 14 11:13 pm    Post subject: Reply with quote

I'd like to elaborate on my initial reply, which was quick and to the point, and since this is the technical section it probably deserves additional commentary.

Fire brick can be considered an insulator, albeit not the greatest. It has a higher K factor vs. another insulating material like mineral wool, ceramics, or calcium silicates. The K factor is the heat flow rate from one side of the insulation to the other. Firebrick is commonly used in furnaces, pizza ovens, and other permanent structures. To make the firebrick as effective as it can be you would have to use some type of high temperature mortar. That's not the best choice for a transportable barbecue cooker. So there's several much better choices for your application. Now, if you want to shield the bottom of your firebox from the caustic effect of ashes and hot coals + have a great heat retainer, then IMO firebrick is a good choice (without the mortar). I would probably opt for a sacrificial piece of metal (ash pan) between the coals and firebrick.

I was an Automation Engineer for an industrial company for 20 years and spent a fair share of my life in boiler rooms installing control systems, curing out refractory and whatnot.
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Tony
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PostPosted: Tue May 13 14 3:57 am    Post subject: Reply with quote

Great clarification via elaboration,Mike! Wink

Of course, your input here and on all other sections of The Smoke Ring Forums are always welcomed and valued. Cool

Thanks for coming in and contributing your knowledge and background experience for all us here!

Best Regards,

Tony Very Happy
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Maniac
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Joined: 02 Oct 2010
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PostPosted: Tue May 13 14 6:26 am    Post subject: Reply with quote

Philip Where are you located ?
I'm still in the boiler rooms and may have access to some let us know where you are.

mike as Tony said great explanation.
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Smokin Mike
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PostPosted: Tue May 13 14 7:12 am    Post subject: Reply with quote

Thanks guys!
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