The 220V ECO180 unit by Marey provides 18kW of power, being the perfect solution for multiple points of use in the southern areas of the US (up to 3 points of use simultaneously in such locations). This unit provides 31°F increase at 4.4 GPM, allowing you to have multiple points of use running simultaneously in hot climates. If you live in colder regions, this unit can reach up to 80°F at 1.5GPM for hot water output at one point of use at time. Marey´s ECO180 is ETL approved and recommended for the whole US territory. This unit must be installed no more than 40 feet from the intended point of use and it must be installed by a professional as its electrical requirements demand (2) 50 Amp breakers. ECO180 has no need for pre-heating as it provides instant hot water on demand. It is activated by water pressure (5 to 85 PSI) from the moment the faucet is opened. The complete ECO line by Marey is the only one in the market with a corrosion resistant patented heating element which reduces hard water build up from chlorine and calcium.