found this on youtube (a year old). emailed the poster but haven't gotten a reply concerning the insulated gas pipe riser. Not sure about the flat top; maybe the part came that way? Was it welded on? He doesn't give any information on construction. earlier posts show the prototype using all tin cans. Pretty small and portable; would seem to work well for a small room or for supplemental heat.
http://www.youtube.com/watch?v=B4mr7Z6I5Bs&feature=related
