video 1 video 2 video 3 I found this after lurking around some of the German sites. This is an HV 49, (Herlt site), the boiler outputs listed appear to be in horsepower so an HV 49 is about a 125K BTU boiler and they spec 6000 liters of storage which is the amount in the videos. They are in German but the third video has some English narration about 1:20 in or so. It can take some pretty long wood and all that pressurized storage takes some big expansion tanks. Very GARN like in many respects. I know someone had asked the question in another thread but it does not appear that anyone is importing these units into North America at the moment. Rey at Advanced Biotechnology in Alberta was but is not longer.