I'm not sure anyone said they were dangerous? For me its just the simple fact that no CSA sticker = not insurable. If I had a situation where I wanted a boiler tied to storage in a building that I wasn't wanting to insure, I might actually consider. But I would need to see one first hand first, and read some first hand user honest feedback before considering.I went to belkomin and they have a video of how they are built all heavy duty partial automated welded and thick steel. They look built really well. Its -50 in siberia, I cant see being that dangerous to have?