There is one from Denmark called the REFO that modulates10%to 100%. very good reviews. The problem the distributor in the uk doesn't export and the factory isn't interested in exporting to the US. It burns woodchips, pellets, grain at moisture up to 45% It is sized for the residental market, 30, 40, 80 I emailed to co. and said I was interested in 3 units but never got a responce
I have the pdf files on it if anyone is interested I can email them to you just send me a PM. I don't know how to post them here.
www.farm2000.co.uk the uk dist. Danish web site
Danish web site (broken link removed)
leaddog