The CREST condensing boiler is the latest and largest addition to Lochinvar’s family of condensing boilers and is the result of several years of research and development. The fully modulating boiler offers innovative fire-tube technology integrated with the exclusive SMART TOUCH operating control, offering engineers greater design flexibility and distinctive performance characteristics to meet today’s building standards for new construction and energy retrofit applications. Five boiler models are available, ranging from 1.5 million to 3.5 million Btu/hr. with thermal efficiencies as high as 99%.