We are planning a new home for Vermont.  We would like to heat with a central wood boiler (indoor).  These boilers such as the Orlan Eko (newhorizoncorp.com) claim to avoid creosote buildup etc with the gasification process.  Does anyone have some years of experiance with these boilers to back this up? 

How compatible will such a boiler be with a combination of in-floor radiant downstairs and hot water wall panels upstairs?  With the in-floor radiant I am leaning towards warmboard, and from an efficiency standpoint, I would like to mix the water temps right for nearly constant circulation.  Are there systems that will adjust the mixing temperature based on outdoor/indoor temp?  I assume I need to recirculate the hot water back through the boiler to protect from cold return water from the radiant. 

What would be a good system to use as backup?  A wood gasification boiler like the Eko side by side with an oil boiler, or a combination unit like Tarm’s. 

Any information or links would be appreciated.  I can’t find anyone here in Connecticut that works with indoor boilers.  Also, Buderus has a small wood boiler…is that available in the US? 

Edit:  It makes sense to back up a wood boiler with an efficient gas or oil fired hot water heater.  That way, I could let the fire go out all summer.  I haven’t calced any heat loss yet, but is it feasible to heat the house with a water heater?  Are there models available that are indirect, in other words the home heating and water heating water is in a closed loop separate from domestic water?  I know just enough to be dangerous as usual.