Clean Burn is the world's leading manufacturer of used-oil furnaces, used-oil boilers, and used-oil recycling centers that ge ... nerate FREE HEAT from motor oils and petroleum based fluids commonly used in all types of internal combustion engines. Clean Burn equipment is engineered from the ground up exclusively to burn used oils, and also burns standard fuel oil for added versatility. The Clean Burn Advantage means that our customers get the biggest return on investment, industry-leading reliability and easy maintenance. read more