Try googleing Central Boiler.
We (here in Pa) have a few customers who have the system and swear by it. It is fairly residentially developed here and the smoke at fire up is pretty bad. There are alot of European companies who have better technology for this type of system and the smoke amounts released are less than the American competition. My customers have both residences and farms which the central boiler is there primary heating system for the winter and hot water yearly. They get the wood for free from us and stoke it every two to three days depending on the temps. In some cases they use unsplit wood in the burner. The systems are based on circulating hot water that is piped to the location to be heated from the boiler unit. Pretty impressive especially if your neighbors are far from you. The average costs for materials starts around 5k and up.
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