Corn and pellet stoves and furnaces are a type of biofuel stove. Gas jets are commonly found in gas stoves, ovens, or barbecues. Pellet grills have their beginnings in pellet stoves. It is used in open fireplaces, stoves and biomass boilers. Corn kernels are used as pelletized fuel for pellet stoves and furnaces. Kerosene kept some market share by being increasingly used in stoves and portable heaters. That means that conventional stoves and ovens can cause more serious burns. A predecessor to the Justa/Eco/Patsari Stoves was the Lorena adobe Stove. During the 1920s Northern Electric made kettles, toasters, cigar lighters, electric stoves, and washing machines. Sizing is necessary for different types of stoves and furnaces. Corn pellet stoves and wood pellet stoves look the same from the outside. Sawdust may make particle board or be pressed into wood pellets for pellet stoves. Common units of all types of stoves include two to four burners. Examples are automobiles and white goods such as refrigerators, stoves, clothes washers, etc. Coleman fuel is used primarily for fueling lanterns and camp stoves.