The Solo Stove is a natural convection inverted downgas gasifer stove that incorporates a secondary combustion for a more efficient and cleaner burn. The bottom vents allow air to enter and flow up the bottom of the grate to feed the primary combustion, a top down smolder. In addition, air entering in from the bottom vents heats up within the inner wall and rises up and out the top firebox vents causing a secondary combustion at the top of the stove. The Solo Stove doesn't just burn wood. It actually cooks the smoke out of the wood and then burns the smoke not once, but twice! This technique makes for a cleaner burn which means less smoke and also allows the stove to burn more efficiently which means it requires less fuel than regular wood stoves.