If you want to wish and hope and hold your breath until a small residential wood chip boiler magically appears on the market have at it but as we have tried to explain, there are technical issues that make it unlikely that you will see such a product. Effectively many companies started with a clean sheet of paper and tried to design such a device and keep coming to the conclusion that the problem was non uniform fuel. Wood chips vary widely in size, shape, fines and moisture content. When dealing with tons of fuel, size and shape is less important but when dealing with ounces it makes a big difference. Moisture content is pretty much directly related to BTU content and the air fuel ratio is closely related to BTU content. Air fuel ratio is based on pounds not density of fuel. Dealing with all that complexity makes for a expensive complex device. Eventually the light bulb went on to make the fuel more consistent by drying it, grinding it then extruding it into pellets. Once the fuel got consistent, than the cost and complexity comes way down. Froling appears to have gone half way on their large institutional boilers where they supply a clean (no fines) pre-dried, consistent chip size but that means the buyer is beholden to Froling to supply those custom chips. Realistically the pellet market has multiple suppliers of standardized pellets so there is a lot to be said to just go with pellets. Note that as the pellet boiler sizes get larger with more complex controls, the quality of the pellet can get lower than what will work on a residential unit. There are commercial pellets made using a blend of agricultural wastes. There have also been attempts to make pellets out of post consumer waste for large units. Talk to any pellet stove user and their number one complaint it usually fuel quality even with pellets that are claimed to be made to Pellet Fuel Institute standards.Pellet stoves have sold very well, so why not small chip boilers? Small chip boilers = pellet stove (replace pellet auger with chip auger) + firebox insulation + boiler coils + circulation pump, right?