Smokeless Outdoor Wood Furnaces? Wood burns 92 hours?

False Claims by Builders! Have you seen claims of wood having a burn time 72 - 96 hours?  That you can put a furnace 500 feet from a building? That you can heat a 5,000 sq ft house with a furnace having a 100 gallon tank? How about 300,000 BTU from the same furnace? Smokeless outdoor [...]