My friend has one of the out door boilers to heat his house and shop. He burns everything in there trash, pine etc. Sucker puts out some heat. Similar to this. View attachment 1715671141
Father in law had one. Sucker was a filthy mess. LOL I know they had a lot of Hemlock. Don't know what else he burned in it. Eventually sold it and got a nice zoned propane system.
