Pellet Stoves Inserts - Convert Your Drafty Fireplace Into an Efficient Heating Source Pellet stoves can be put in in your existing fireplace or as a stand-alone heating source. They burn compressed pellets made from wood byproducts such as sawdust and can be highly efficient. They are also "green" because https://www.fireplacesandstove.com/products/us-stove-non-electric-pellet-stove-60-lbs-hopper