Smoker build - RF - firebox size help

[TheHojo]

RF build -horizontal cooking chamber with a vertical chamber on top of fire box - I have done a search - but could not find a definitive answer - do I need to include volumn of both horizontal and vertical chambers when figuring size of fire box (1/3) - some say yes and some say no - any help would be appreciated - thank you

 

[Damn True]

I have a link to a calculator I found online. On my phone now. I'll post if for you in the AM.

 

[TuscaloosaQ]

You do not need to figure both only firebox

 

[pbj]

I have a link to a calculator I found online. On my phone now. I'll post if for you in the AM.

http://www.feldoncentral.com/bbqcalculator.html

 

[dwfisk]

You do not need to figure both only firebox

^ Yep!

http://www.feldoncentral.com/bbqcalculator.html

^ Feldon is a good calculator. If you can I recommend you oversize your firebox by 105%-110%. Also, if you think you might line your firebox (for example I used 1/2 split woodstove firebricks; 1-1/4 thick, to line the bottom of my firebox), take that into account when designing for internal dimensions.

 

[TheHojo]

So if I am reading this correctly - firebox just needs to be one third the size of the horizontal chamber - DO NOT need to also include the vertical chamber in this calculation. Ran the numbers on Feldon - horizontal cooking chamber is 11304 cubic inches - thus it recommends a firebox of 3768 cubic inches. My firebox is 5654 cubic inches - thus 150% of the recommended firebox. Am I doing this correctly - thank you

 

[Damn True]

http://www.feldoncentral.com/bbqcalculator.html

Thats the one. Mahalo

 

[TuscaloosaQ]

here is another one

http://www.smokerbuilder.com/pitcalc/