Thought this deserved a new thread. If you have an Eko, they come without any underbelly insulation. Insulate it! Turns out the underneath of the boiler has a thin water jacket and is not all refactory concrete. I recently added a piece of 2" blue foam insulation, as well as a thin layer of fiberglass sandwiched in the middle for an air seal. As of today I have been through 6 loads of wood similar results: about 2-3 hour longer burn. Now, if your Eko is in your home, you may like the benefit of the heat radiated from it without insulation. But if your outdoors at all, go get a sheet of foam and try it out. I will be adding more insulation to the other sides tomorrow and will later report the effects. Also, if you are heating large amounts of storage, im not sure what the results would be. Im going to guess a few more degrees per load, or an earlier idle time. I currently have an insufficient amount of storage as I think alot of us have, but its stretched out my burn from 8-9 hours to 10-11 hours, and still have nice coalbed for next load. I'd like to hear if any of you try this and your results. I only wish I had done this at the beginning of the burning season! I hope this is a worthy contribution to the forum instead of receiving info for a change.