will outdoor boilers burn saw dust?
Outdoor boilers will burn just about any thing from coal, tree stumps, corn cobs to pallets if they fit through the door. Burning saw dust is a little dangerous because it will flare up and almost explode when you throw some onto hot coals especially real fine sawdust. I would be careful burning a lot of it. It doesn't seem to burn with a real hot flame as it smolders because it doesn't get a lot of oxygen and has to be stirred causing it to flare up and flash back. I would bag a little at a time in paper bags and bank it and leave the door closed and let it burn. Safety is the rule with sawdust or any fine particles that burn. It is explosive when thrown on hot coals.
You are probably tired of looking through stacks and stacks of projects on woodworking in magazines and books of all kinds for some instructions on how to do a certain project.
Will they? Yes they can the real question is should you use saw dust as a fuel source. I would not recommend it for several reasons. The first is a safety issue. My outdoor boiler has a blower fan that makes the fire burn hotter when heat is called for. The blower would also blow the sawdust causing flare ups a dangerous situation. Next it might tend to clog your blower and cause excess ash build up. If you are trying to dispose of a small amount of sawdust, why not spread it in your garden it makes great mulch.
