Pellet Stove Fireplace Pellet stove fireplaces come as freestanding models or are installed into existing wood burning chimneys which can give new life to old drafty fireplaces. They operate by using a thermostat to determine the temperature of the room and feed pellets into the fire at the right rate. https://www.fireplacesandstove.com/products/castle-serenity-pellet-stove-with-smart-control