I have a HS Tarm and I like it. I got mime old and used for free so of course i like it. Chect out info@woodboilers.com. I also have looked aroud at other types of boilers. The Seton boiler really interests me. Try googling seton boilers. Beware there are many false efficiency claims in this racket. One bit of advice I got from an oltimer was not to get an oversized boiler, it will satisfy your heating needs too quickly and produce lots of smoke and creosote. Most Boiler salepeope size boilers to heat your house on the coldest day of the year for your area. You may have 8 of these days so the rest of the year your boiler is way over fired wasteing whatever fuel you burn. Of course you don't want to be cold on those days so you size your boiler to those days. If you use a wood boiler in addition to other heat, undersize it a bit and it will be much more efficient for more days of the season.