Lochinvar 399,999 BTU Armor Condensing Commercial Water Heater

Lochinvar ARMOR is a fully condensing commercial gas water heater that delivers long-lasting life-cycle efficiency surpassing any commercial unit in its class. When you look beyond the numbers, you'll discover the many ways that ARMOR technology is in a class by itself! ARMOR features advanced Negative Regulation (Neg/Reg) sealed combustion technology, permitting fan speed to constantly adjust the volume of fuel and air entering the burner. This ensures that ARMOR can safely and reliably operate with supply gas pressure as low as 4 inches water column. ARMOR is also equipped with fully modulating combustion with 5:1 turndown. This means ARMOR can fire as low as 20% of maximum input when water heating demand is lowest, and increase the firing rate up to 100% as demand increases. The result is better overall efficiency and less cycling, compared to all other tank-type units which are "on-off," which means they can only fire at 100% of maximum input. With standard tank-type water heaters, your choices are lim...