PVI Conquest is a condensing, semi-instantaneous, fire-tube water heater constructed from AquaPLEX duplex stainless steel. It’s corrosion-resistant in potable water at any temperature — no linings or anodes required, the company says. Conquest is 96% efficient, less than 20 ppm NOx and is available in 399, 500, 600, 700, 800, 900, 1000 MBH with 100 and 130 gallon storage tanks. Conquest provides three to five times the typical industry warranty featuring a 15-year tank and heat exchanger warranty.