Retro-fitting a small stove to use as a batch box

What are your collective thought about starting with a small wood stove (new for $100) to use as a batch box, and build from there a 6" system. I built my first RMH 2 years ago, and have been wanting to build a batch box, but I'm struggling with the door, and a friend suggested the retro-fit. Any issues I should be aware of? Looking at using this one from Sportsman Guide. HQ ISSUE Outdoor Wood Stove
Item # WX2-648081
Mfg. Number: 21020102201
UPC: 885344585037

https://www.sportsmansguide.com/product/index/hq-issue-outdoor-wood-stove?a=1884248&pm2d=CSE-SPG-15-PLA&utm_medium=PLA&utm_source=Google&utm_campaign=CI&gclid=CjwKCAjw8IXMBRB8EiwAg9fgMK_LFUAxKzCN2xIyGvFW-YPQS8Hq1F3VY05YiQE6UTV4b7Q8gJOaTRoC4aUQAvD_BwE

Hi Scott, welcome to permies.

What you want to achieve has been done before, but it isn't easy. Mainly because there need to be space enough in the stove to add a liner of firebricks. Here's a French permaculture group with a good documented build. Although my understanding of the French language is rudimentary I could see what need to be done.



The only thing that they left out was mentioning where the technology originated from. As such, they won't meet the terms of the CC-BY-SA license as mentioned on the batchrocket site.

Thanks Peter. So you would recommend a build from scratch with a door instead would be easier? I have the dimensions from your calculations of a 6" system at 8 10/16"W x 12 15/16" H and 17 4/16" deep.
Any suggestions of how I could affix a door to the front securely? Looking at this door the on ebay for $50 Cleanout Door 8x12in Cast Iron, Single, PartNo 129, by Vestal Mfg Co

http://www.ebay.com/itm/Cleanout-Door-8x12in-Cast-Iron-Single-PartNo-129-by-Vestal-Mfg-Co/152489397088?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D41376%26meid%3D46036468327943329721f8a98f997f4e%26pid%3D100033%26rk%3D1%26rkt%3D6%26sd%3D122485697332&_trksid=p2045573.c100033.m2042