Scrap wood and ship-lap burners have been around for decades. Barrel stoves, braziers, and oil drum fires in Depression-era Hoovervilles support this. Professionally built wood ovens with sawdust hoppers were used in the early part of the century. All of these units used scrap and loose wood, or sawdust. In 1930, the Presto-Log was invented reusing scrap sawdust from the Potlatch pine mill in Lewiston, Idaho as domestic heat. From this came the miniaturized pellet stove, which emerged from Washington State in the 1980s.
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