The new Lochinvar Noble fire tube combi boiler is designed for space heating and DHW in residential applications. There are three models ranging from 110,000 to 199,999 Btu/h that achieve 95 percent AFUE and offer a 10-1 turndown. An intuitive setup wizard guides contractors through programming parameters with diagnostic information and system status in plain English. Control technology for pre-heat and domestic hot water response modes enable this combi to deliver hot water almost instantaneously during frequent use cycles, like washing dishes. For space heating, when the ‘Air Handler Interlock’ switches from space heating to domestic hot water mode, it immediately stops non-heated air from circulating so homeowners stay comfortable.