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The MAREY ECO150 14.6kW unit is ideal for up to two simultaneous points of use, increasing the incoming water temperature up to 41°F at a 2.5 GPM water flow rate. MAREY ECO series tankless water heaters are the only ones in the market to include a German-designed, patented heating element with a stainless steel water channel. This high quality component is corrosion resistant and reduces hard water build up from chlorine and calcium. unit performance is affected if installed above 2000 ft elevation from sea level.


  • Unit requires 220-Volt – 240-Volt and (1) 70 Amp double pole breaker
  • Smart technology: easy management and simple adjustments on a LCD panel allows you to program the exact desired water temperature thereby optimizing energy consumption
  • Flow switch activation mechanism allows the unit to produce constant temperatures with as little as 0.5 GPM / 5 PSI
  • ETL certified
  • Endless hot water on demand: activated by water pressure (5 PSI to 85 PSI) from the moment the faucet is opened
  • Maximum GPM achievable is influenced by the kW power of the unit AND the incoming cold water temperature
  • Tankless water heaters save energy because they use up to 60% less energy than conventional tank water heaters as a result they are cost effective and environmentally friendly
  • MAREYs eco line can maintain 98% efficiency level throughout a lifetime
  • No need for pre-heating: instant tank less water heater on demand heating
  • Tankless water heaters provide an efficient hot water solution eliminating the stand-by energy consumption of conventional tank units
  • Regions with incoming water temperature at 55 F or lower consider using our ECO180 or ECO240N models.
  • Unit performance is affected if installed above 2000 feet elevation from sea level
  • Unit must be installed by a professional plumber or electrician to ensure safety and quality
  • Please consult temperature map for suggested points-of-use according to geographical area


  • Brand: Marey
  • Amperage (amps): 70 A
  • Flow Rate @ 35°F Rise (gallons/min): 3 gal (US)/min
  • Flow Rate @ 45°F Rise (gallons/min): 2.5 gal (US)/min
  • Flow Rate @ 55°F Rise (gallons/min): 1.7 gal (US)/min
  • Flow Rate @ 65°F Rise (gallons/min): 1.5 gal (US)/min
  • Fuel Type: Electric
  • Maximum Temperature (F): 98 °F
  • Minimum Activation Rate (gpm): 0.5
  • Minimum Temperature (F): 40 °F
  • Number of Elements: 1
  • Number of Showers: 1-2
  • Required Volt Connection: 220 volt
  • Uniform Energy Factor: 0.93
  • Wattage (watts): 14600 W