PVI, a Watts brand, expands its Centurion family of compact, direct-fired domestic water heaters with the addition of a 1600 MBH model to complement its existing 2000 MBH size. With the new size, plumbing contractors have even more options to right-size their water heating systems, creating additional efficiency benefits to commercial applications. Centurion water heaters deliver up to 99% thermal efficiency and offers O2 Trim, which allows the unit to self-adjust and maintain optimal air/fuel rations for peak efficiency, as well as low emissions and maximum uptime reliability. The compact Centurion occupies up to 65% less footprint than competing models. Its small size allows the water heater to fit through a standard doorway and in most freight elevators.