wood burning question

thanks guys

here are a few pics of it

it looks like it has a an adjustable draft doo hicky on it


we have slept out there in 20 degrees cold, and woke up to 6 inches of snow with nothing but a electric space heater, set to 60 degrees

but i think a stove would be nicer...and i do like saunas

i thought about putting a 90 degree on there to send the exhaust out that way...really because i thought it would be easier to seal


any ideas what i need to do to keep this from catching the walls on fire?

spacing and such

oh, thats another thing, the roof is only 8 foot high or so, would the exhaust be cool enough to go through at that point, or would this fry my shingels?