The Triangle Tube Challenger Solo is an energy efficient condensing boiler with an AFUE of up to 94%. It comes in four models, ranging from 85 to 145 MBH. The Combination Solo features a combination copper water tube and aluminum block heat exchanger to provide maximum efficiency. The stainless steel burner with woven steel fiber mesh has a direct spark ignition and a variable speed blower assembly. The Challenger Solo features a digital control which displays both U.S. and metric units, with an advanced modulating temperature control. The unit features a standard outdoor reset and is indirect water heater compatible.
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