Flue Pipe Dimensions

[patricimo54]

Walking thru an antique store the other day with my Bride I spotted a way cool little wood heater/stove complete with a section of pipe. The thing was sporting a tag stating that it was an old caboose stove with a price tag of $300.
Well as cool as it was $300 is a lot of money for a little heater, but really got me thinking was the size of the pipe. I'm not sure 3" or 4" it looked to be the size of a gas hot water heater flue.
With me being without a surplus of funds, but in possession of some scrap metal I have been wanting to build a small heater out of 12" pipe and put heat in my fur shed/ work shop. The problem is venting. The cheapest ceiling/roof jack for 6" pipe is well over $100. Did I mention I was low on funds.
My thinking is the ceiling jack for the smaller gas fired heaters might meet my needs.
If any of you guys have knowledge or insite on my dilemma your input would be greatly appreciated

[Admin]

I'm not sure on the dimensions or the gas pipe or the flange for that kind of piping. Whenever I hook up a woodstove I don't monkey around or cut corners. I did in the past and it always came back to haunt me. Leaking pipes, dripping creosote, clogging elbows, lack of draft etc. I run Metalbestos insulated chimney pipe now and never have any issues to deal with. Unfortunately, as you mentioned above - it is expensive.

I wanted a small heater for my supply shop and found just what I needed at Tractor Supply yesterday. I bought a 25000 BTU gas heater there for 149.00 . It's ventless so no money invested in chimnies or pipe. Just gotta run a line to a gas cylinder and I'll be good to go. They had several models there and the prices were excellent.