wood has moisture in it no matter how long it drys,people that say oh my wood burner has electric driven turbine that spins at 10000rpm then injects air into primary chamber then secondary chamber before going out chimney.ok how much electric does it use to do all this,plus what happens when bearing for these high speed latest technology fails your on your hands and knees with a flash light like wow to many moving parts.other problem with these new stovers is to much electronic boards and sensors electronics dont like heat and water condensation and where are they on non d.s. machine stoves.plus with d.s you can burn coal and see nothing coming out chimney.everyones on this kick go green no smoke save earth bla bla bla .i had a 1992 geo three cyl car 50 mpg new toy elec car prius 40mpg with ton electric gen batteries ,that spewed more chemicals and smoke being built over in japan than basic 92 geo .new wood stoves are same deal lot smoke up peoples you no what.d.s.machines made in usa not assembled in usa with mexican parts. before buying d.s. machine i went on internet to see what was out there was not to impressed with to much maybe harman,so i asked plumbing guys hey who makes good boiler i heard d.s. called dist said give me like three people that bought from you called them no complaints,so i bought one.if they where junk than would i still be cutting wood to use every year,ask people with outdoor wood boilers how many cords wood do you use ,how much was unit installed how well insulated are they,take ride to distributor see how many are back getting rebuilt .when all the fancy eye wash is off boiler and you can see whats underneath far from impressive.you can build shed put d.s. in shed make bigger keep junk in summer for half what it cost compared to competition .how come comments are disabled on you tube of other boilers makers .type in on internet complaints from buyers of what ever stove you plan on buying and see for yourself.