Lochinvar’s ARMOR X2 commercial condensing water heater combines stainless-steel heat exchanger technology with modulating/condensing combustion to deliver thermal efficiencies as high as 96%. ARMOR X2 is equipped with two independent combustion systems that consist of two 316L stainless-steel heat exchangers, gas valves and combustion blowers designed to work in unison. Available in models with 1, 1.3 and 1.5 million Btu/hr. inputs.