I just finished a new heating system and went with a New Yorker 130 wood boiler with a wall-mount propane boiler as a secondary boiler. I run both Radient heat and baseboard off this set-up as I have existing structure and a new addition. My problem is that the wood boiler gets the water in the boiler up to temperature and then dumps it into the heating loop, and within a minute or two, the returning water from the house cools the boiler down and then starts the cycle of the boiler needing to get the returning 20 gallons of water back up to temperature. This can take 7-9 minutes based on the fire. By that time, the hot water that is circulating in the house is cold again. When sizing my system, the heating contractor said I needed 80,000 BTU's, and we went with a 130 to allow for overage. Therefore, it doesn't appear that I am undersized. The propane works well, but it uses propane which is my problem there! I would like to have a heating system that doesn't burn so much propane through the winter months. I was hoping this wood boiler would be able to stand alone 80-90% of the time, but it is just not doing it. I thought about even getting a different boiler such as a gasification boiler or coal that may be able to have a shorter recoup time. I could really use some help here as I have had my heating guy and a field rep from the distributor come and look at my system. The end result is both of them shaking their heads and walking away with no great ideas. Thoughts? Ideas?