Hey /out/ I need help, I saw a thread awhile back about homesteading, and in the thread there was a post with a video about this crazy hot water heater some guy had made.

It was this big, wood burning, outdoor hot water heater made out of plaster or concrete something. It was big and ugly.

Anybody know what I'm talking about? I've been googling different combinations for the past half hour and can't find anything.

Any help would be appreciated!