
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
$766.99
From the manufacturer

At EcoSmart, we develop innovative, life-enhancing tankless electric water heaters for homes and businesses, enabling them to enjoy everyday living: sharing the warmth of endless hot water. Additionally, EcoSmart is part of the Rheem family of brands.
Every EcoSmart tankless electric water heater delivers endless hot water, while at the same time saving space, time, money, and allowing you to reduce your overall energy and water use. This mark serves as proof of product compliance to North American safety standards and guarantees a safe and reliable water-heating solution.
EcoSmart products are technologically advanced and can be used worldwide in a variety of applications from homes of any size to business environments such as offices or restaurants, or even recreational vehicles. Each tankless electric water heater is easy to install, dependable, and supported by a knowledgeable customer support team.
Finally, as part of our commitment to give back to our communities, EcoSmart actively participates in the Rheem Heart of Comfort program with donations to Habitat for Humanity initiatives.
Go Tankless

Product Features
- Endless hot water
- Save up to 50% in water heating costs according to the Department of Energy
- Compact design, more storage space
- Digital temperature control 80 - 140° F
- Field replaceable elements
- Advanced self-modulating technology
Endless Hot Water- When sized correctly your tankless electric water heater will provide you with endless on-demand hot water. It heats water as it passes thru the unit, instead of storing hot water like a traditional tank water heater.
Save Money, Save Space, Save Energy
Save Space - Traditional tank heaters take up a lot of space, but EcoSmart's sleek, wall-mounted design frees up floor space for more storage and is 90% smaller than a tank.
Save Energy - EcoSmart features the most advanced self-modulating technology, only using the amount of energy needed to heat water when you need it.
Save Time - Point-of-use installation and on-demand heating cuts down on waiting for hot water.
Save Money - EcoSmart tankless heaters only turn on when you need hot water - plus they cut down on heat loss, saving you up to 50% in water heating costs according to the DOE.
ECO 11
EcoSmart ECO 11 is a 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications. It can provide between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature. To select the best solution for your hot water needs, please refer to the sizing guide. With EcoSmart you will be happier knowing the warm water you expect is available endlessly, consistently, and on-demand, allowing you to reduce your water and energy waste. Now that feels warm all over! EcoSmart – Sharing the Warmth.
3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.
Step 2: Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature. Tankless electric water heaters are sized for maximum simultaneous use, not maximum fixtures in your home.
Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.
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---|---|---|---|---|---|---|
ECO 8 | ECO 11 | ECO 18 | ECO 24 | ECO 27 | ECO 36 | |
kW | 8 | 13 | 18 | 24 | 27 | 36 |
Voltage 240 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Temp. Range 80°F - 140°F | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Max Amperage | 33 | 57 | 75 | 100 | 112.5 | 150 |
Required Breaker | 1 x 40 AMP | 1 x 60 AMP | 2 x 40 AMP | 3 x 40 AMP | 3 x 40 AMP | 4 x 40 AMP |
Wire Gauge | 1 x 8 AWG | 1 x 6 AWG | 2 x 8 AWG | 3 x 8 AWG | 3 x 8 AWG | 4 x 8 AWG |
Size | 11.5" x 8" x 3.75" | 11.5" x 8" x 3.75" | 17" x 14" x 3.75" | 17" x 17" x 3.75" | 17" x 17" x 3.75" | 17" x 21" x 3.75" |
Weight | 4.75 lbs | 6.5 lbs | 11.25 lbs | 13.75 lbs | 13.75 lbs | 17.4 lbs |
Water Connections | 1/2" CF | 1/2" CF | 3/4" NPT | 3/4" NPT | 3/4" NPT | 3/4" NPT |
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