Clean Burn offer's coil tube boilers engineered from the ground up to burn used oils. They efficiently recycle used oils as a free fuel source to generate hot water for a wide range of applications including: car wash facilities, baseboard heating, space heating, in-floor heating, and ice melt applications. Clean Burn offers three sizes of coil tube boilers, each UL listed for use in central heating systems. They can be used in combination to create a boiler system perfectly sized for any facility.