Pellet Stoves Inserts - Convert Your Drafty Fireplace Into an Efficient Heating Source Pellet stoves can be free-standing heat sources, or fireplace inserts that are installed into your existing fireplace. They are highly efficient and can burn compressed pellets made of wood byproducts like sawdust. They are also deemed "green" https://www.fireplacesandstove.com/products/comfortbilt-hp22-n-black-pellet-stove-with-smart-controller