Clean Burn is the world's leading manufacturer of used-oil-fired hot air furnaces and hot water boilers. Energy-efficient Clean Burn systems eliminate your used-oil disposal costs while providing a source of free heat and hot water. Clean Burn is proud of its research and development department... an approved Underwriters Laboratory testing facility. And, Clean Burn owners can rely on the after-the-sale parts and services expertise of the largest distributor network in the industry.