ECO 240



Quick Overview:

  • ETL approved
  • Designed using SMART Technology.
  • Whole house solution (up to 4 multiple points of use)
  • Recommended for the whole US region
  • 5 year limited warranty


  • 220 volts
  • Its LCD panel allows you to program the desired temperature
  • Compact with digital temperature control in increments of 1°F ranging from 86°F to 140°F
  • No need for pre-heating: instant on-demand heating.
  • Must be installed no more than 50 feet from the intended point of use.


The 240V ECO240 unit by MAREY provides 24kW of power (up to 4 points of use simultaneously). This powerful unit provides 35°F temperature increase at 4.7 GPM. Marey’s ECO240 is ETL approved and self modulating – an ideal whole-house hot water solution. The 24kW electric on-demand water heater can be used in a wide variety of applications from homes of any size, business environments such as offices or restaurants. KEY Installation requirements: 8 AWG wiring, 3 double pole 40A dedicated breakers.

  • Minimum Activation Rate 0.84 GPM
  • Minimum Temperature 86 °F
  • Water Connection Location – BOTTOM
  • Water Connection Size 3/4”

Flow Rate:

  • Flow Rate @ 35°F Rise 4.7 GPM
  • Flow Rate @ 45°F Rise 3.6 GPM
  • Flow Rate @ 55°F Rise 2.8 GPM
  • Flow Rate @ 65°F Rise 2.35 GPM

Additional Features:

  • Minimum Activation Rate 0.84GPM
  • Maximum GPM achievable is influenced by the kW power of the unit AND the incoming cold water temperature.
  • High quality stainless steel case can patented, German-designed water channel and heating chamber. All models in the Marey ECO line are designed with a corrosion resistant patented heating element, which reduces hard water build up from chlorine and calcium thereby extending the life of the unit.
  • Safety features include overheating protection. Unit will shut off when no water is detected.
  • Self-modulating, the electric tankless water heater can be used in a wide variety of applications from homes of any size, and in light commercial environments such as offices or restaurants.
  • Unit must be installed by a professional plumber or electrician to ensure safety and local building code compliance
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