Wood Doctor HE5000 gassifier. Heating 2200sqft main house forced air, 1000sqft in-law suite forced air, 800sqft garage concrete radiant heat, all DHW, and hot tub. 1st year, so far I love it.
Central Boiler CL 5648. Five years so far. Only problem was one solenoid to control the draft. If memory serves me right, about $15. Until I got over to the dealer for a new one I just placed a small screwdiver under the draft door and she burned just fine. Just watch when doing this so the stove does not get the water too hot, was really quite simple. Did replace the rope around the door last year but that is routine maintenance.
Hardy H4. First year with it and the house is 8 degrees warmer. Was spending almost $5000/yr in propane and keeping the house at 62 degrees at night. Installed myself for $7600 including DHW