Pellet Stoves Inserts - Convert Your Drafty Fireplace Into an Efficient Heating Source Pellet stoves are free-standing heat sources, or fireplace inserts that install into your existing fireplace. They burn compressed pellets made from wood byproducts such as sawdust and can be highly efficient. They are also deemed "green" since https://www.fireplacesandstove.com/products/cleveland-iron-works-mini-wifi-pellet-stove