thanks roger nice to meet you to.....I had an out door model royall 7200 stainless nonpressurized but had a ton of problems with it....alot of the welds were leaking after 4 years.....I still have the pics. I work for a welding supply company and i have a water cooled tig,and a mig welder at home,but another friend had the same one and he fixed his a week or two later it would leak somewhere elese...I did not want to have to drain a boiler every 2 weeks to weld it so I bought a thermal-control wood boiler(indoor model) in an insulated jacket....and love it...he makes outdoor models as well....
I may build a woodboiler in a year or two for my neighbor...they are worth the money....plus you dont have to buy fuel oil.....lol
kelly