Insulated fire box

[Charv57]

Hey yall quick question insulation vs air gap insulation I'm from Australia good high temp insulation is hard to get and expensive. I was wondering if there is much difference between it and a large air gap I will be running a 24" outside pipe 20" inside pipe both 1/4" wall. That's a 2" air gap. What do you seasoned smokers think ?

 

[chef jimmyj]

There are a few guys with build experience. Let's see if we can get you some help... JJ

 

[daveomak]

Insulation Materials - Temperature Ranges (engineeringtoolbox.com)

Employing upper and lower air inlets, to the FB, your FB temp should not exceed 4-500 F....

 

[ultralow787]

Insulation Materials - Temperature Ranges (engineeringtoolbox.com)

Employing upper and lower air inlets, to the FB, your FB temp should not exceed 4-500 F....

View attachment 515838

Hey! I thought this photo looked familiar......It is my smoker! First build and still going, but starting to dream about #2 out of a 60 gallon air compressor tank.