Great thread. Here are some more useful links to boilers that are made in America.
http://www.royallboiler.com/
http://www.outdoorwoodfurnaceboiler.com/
http://wood-furnaces.net/indoor-boilers.aspx
Also, here is the new EPA ruling on boilers updated on 2-4-15:
http://www.wood-heating-solutions.com/2015-epa-law/
