EcoSmart - Electric Tankless Water Heaters | Point of Use | Radiant Heating

EcoSmart tankless water heaters deliver hot water by heating the water as it passes through the unit.

Once a fixture is turned on, water enters the EcoSmart heater through the inlet pipe. The flow sensor near the inlet detects the gallons per minute flow rate and the inlet thermostat reads the temperature of the incoming water. The control board calculates the appropriate power output to reach the set temperature based on the inlet temperature and flow rate. Triacs send the necessary voltage to the heating elements to achieve the correct power output. The heating elements activate and heat the outgoing water to the user-set temperature.

One of the many advantages of an EcoSmart tankless water heater is the ability to install the heaters closer to the point of use. This reduces the amount of travel time within the pipes and provides hot water more quickly to the fixture. EcoSmart units only heat water when it is required, so there is no wasted energy keeping stored water hot 24/7.

It is important to have a basic understanding of how the water is heated to best select a unit There are 3 pieces of information that are necessary to choose a unit: Gallons per minute of application, inlet temperature of water, and desired outlet temperature. For assistance in choosing a heater, see applications below.

  • kW Required – to find which size of unit you need, figure out the gpm of the application and the desired temperature rise.
  • kW Req. = GPM x temp. rise/6.83
    • Example: For a 2.0 gpm shower and a 0.5 gpm sink running simultaneously with an inlet water temperature of 40°F and a desired outlet temperature of 105°F, an ECO 24 is recommended.
    • Example Calculation: 2.5 x (105-40)/6.83 = 24 kW
  • Temperature Rise – the temperature rise that a specified unit is able to deliver for an application
  • Temp. Rise = kW x 6.83/GPM
    • Example: An ECO 18 (18 kW) heating a 1.5 gpm application will deliver a maximum temperature rise of 82°F. In a region with an inlet water temperature of 40°F, the max. outlet temperature would be 122°F. The ECO 18 is a good fit for any set temperature 122°F or under. For a higher outlet temperature, consider a unit with a higher kW.
    • Example Calculation: 18 x 6.83/2.0 = 82°F temp. rise
  • Gallons per minute capacity – how many gpm a unit can deliver with a known inlet temperature and set output temperature
  • GPM = kW x 6.83/temp. rise
    • Example: In a region with an inlet temperature of 60°F in an application using an ECO 11 (13kW) with a set temperature of 105°F, the ECO 11 will deliver a maximum of 2.2 gpm flow rate.
    • Example Calculation: 13 x 6.83/(105-60) = 2.2 gpm

For simple calculation, kW reference is based on a 100% heater efficiency. EcoSmart tankless heaters are 99% energy efficient. Inlet temperatures may vary by season.

For more assistance in selecting the best unit, or for more information, please contact EcoSmart.

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Products and Services

ECO 27 | Electric Tankless Water Heater for Whole Home Applications

The ECO 27 one of the larger models in the range of EcoSmart tankless water heaters and it is recommended as a whole house heater or for other high-flow applications. Learn more »

ECO 8 | Electric Tankless Water Heater for Point-of-Use Applications

The ECO 8 is one of the smaller EcoSmart tankless water heaters and it is the perfect fit for low-flow or point-of-use applications. Learn more »

ECO POU 3.5 | Point of Use Electric Tankless Water Heater

The POU 3.5 is a compact EcoSmart electric tankless water heater recommended for single sink water heating. Learn more »

POU 6 | Point of Use Water Heater Ideal for Hand Washing Applications

The POU 6 is a compact EcoSmart electric tankless water heater recommended for single sink water heating. Learn more »

ECO 11 | Electric Tankless Water Heater for Point-of-Use Applications

The ECO 11 is one of the smaller EcoSmart tankless water heaters and it is the perfect fit for low-flow or point-of-use applications. Learn more »

ECO 24 | Electric Tankless Water Heater for Whole Home Applications

The ECO 24 one of the larger models in the range of EcoSmart tankless water heaters and it can be used as a whole house water heater. Learn more »

ECO 36 | Tankless Water Heater for Multiple Applications Running Simultaneously

The ECO 36 is the largest EcoSmart tankless water heater can provide hot water to multiple appliances running simultaneously so it is recommended as a whole house heater or for other high-flow applications. Learn more »

ECO MINI 1 | Electric Mini Tank

Save water by eliminating the wait for hot water to reach the faucet. Simply tap into the water line and install the ECO MINI 1 electric mini tank heater directly at the point-of-use. Learn more »

ECO MINI 2.5 | Electric Mini Tank

Save water by eliminating the wait for hot water to reach the faucet. Simply tap into the water line and install the ECO MINI 2.5 electric mini tank heater directly at the point-of-use. Learn more »
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400 Captain Neville Drive
Waterbury CT 06705
United States

(877) 474-6473

support@ecosmartus.com

EcoSmart Green Energy Products