Has anybody looked at marathon heater company coal/wood boilers (yankee (logwood) line)? I love mine. It burns anthracite and bit to perfection. If you burn wood this unit it will handle it well. Keep in mind the unit is made for high temps. My aquastat is set at 205 degrees with a 5 degree differential. The manufacture recommends temps @ 212-220 degrees burning wood, and 185 for burning coal.