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The updated line of ARMOR Condensing Water Heaters is available in a total of 10 models, ranging from 399,000 to 4 million BTU/hr. These models are constructed with superior grade 316L stainless-steel, which reduces heat loss and provides up to 99% thermal efficiency and reliability for large commercial applications. This line features a 10:1 turndown ratio on models 399,000 through 999,000 and 5:1 turndown ratio on models 1,250,000 through 4,000,000 btu/hr. Armor also offers direct vent flexibility up to 150 feet in floor mount, wall mount, indoor and factory ordered or field convertible options, making it ideal for a variety of installations.