US Stove 2000 Sq. Ft. American Harvest EPA Certified Pellet Stove Fireplace Insert. 6041i. Fireplace Inserts. First introduced in 2001 as our first Multi Fuel stove, the 6041I American Harvest stove has evolved into one of the most sophisticated heating appliances on the market. Not only is it capable of burning compressed wood pellets, it can also burn corn, soy beans, cherry pits, olive pits, bio mass fuel grains, and processed silage with just a few simple adjustments.