Taco’s ECM wet rotor 00e VR1816 circulator offers up to 85% savings in energy consumption compared to standard circulators of the same size, Taco notes. The circulator offers up to 18’ shutoff head and 16-gpm flow. With the turn of a dial, it provides simple self-sensing variable-speed operation in three different modes: infinitely variable-fixed speed; constant pressure, self-adjusting, variable-speed; and proportional pressure, self-adjusting, variable-speed.