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Ecosmart Eco 8, Eco 11 Electric Tankless Hot Water Heater, Small

Retail price: $319.00
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ECO 8 and ECO 11 Electric Tankless Hot Water Heaters let you enjoy endless hot water when you want it, only when you need it. Go Tankless and Save.

Get rid of your tank and get:

Energy savings: The Ecosmart Smart Technology electric tankless water heater can save you as much as 60% off your water heating bills. Even if it costs the same or less than a regular tank water heater. Energy efficiency rating is 99.8%. It will definitely pay for itself many times over.
Extra space: Ecosmart's tankless design saves you a large amount of space for storage (see picture below).
Luxury and comfort: Never run out of hot water.
Convenience: The Digital Temperature Dial lets you easily set your preferred maximum hot water temperature by up to 125-degrees Fahrenheit. Could you ever do that with your old hot water tank?
Safe Self Modulating Technology: Electric inline water heater does not cause spikes in the electrical current.
30-Day Money-Back Guarantee and a Lifetime Warranty

These water heaters are the most powerful Smart Technology electric tankless units in the market today. Perfect for homes, schools, clinics, health facilities, manufacturing facilities, hotels, offices, motels, warehouses, restaurants, and many other places.

How to choose your water heater model

Step 1: Add up the flow rates of all the water use points that you expect to simultaneously use. It does not matter whether your home has 2 showers, 4 sinks, a dishwasher and a clothes washer. What only matters is which of them you expect to run at the same time. See Chart A.

Step 2: Determine your coldest incoming water temperature of the year.

Step 3. Take your info from Step 1 and 2 and look up the info on Chart B.

Step 4: Ensure you have sufficient electrical service. See "Electrical Requirements" chart below.

  Chart A

Flow rate guidelines for various hot water applications.

This chart is based on the use of water saver showerheads rated at 1.5 GPM and water saver aerators for sinks rated at 1.0 GPM. The number of showerheads and sinks next to each model reflects the model unit's capacity to make hot water simultaneously with the unit's temperature control set to 105°F. Note: The shower temperature that most people prefer is between 98°F to 105°F.

 Ecosmart Eco 8, Eco 11 Electric Tankless Hot Water Heater, Small

Chart B

Inlet Water
40°F 45°F 50°F 55°F 60°F 65°F 70°F 75°F 80°F
ECO 8 (this page) .75 GPM .80 GPM 1.0 GPM 1.2 GPM 1.3 GPM 1.4 GPM 1.5 GPM 2.0 GPM 2.2 GPM
ECO 11 (this page) 1.3 GPM 1.3 GPM 1.5 GPM 1.7 GPM 1.9 GPM 2.0 GPM 2.3 GPM 2.7 GPM 3.0 GPM
ECO 18 1.9 GPM 2.0 GPM 2.2 GPM 2.4 GPM 2.7 GPM 3.1 GPM 3.5 GPM 4.1 GPM 5.0 GPM
ECO 24 2.5 GPM 2.7 GPM 3.0 GPM 3.3 GPM 3.8GPM 4.1 GPM 4.7 GPM 5.4 GPM 6.5 GPM
ECO 27 2.8 GPM 3.1 GPM 3.4GPM 3.7 GPM 4.2 GPM 4.8 GPM 5.2 GPM 6.1 GPM 7.3 GPM

This chart presents the flow rates at each inlet temperature with the unit's temperature control setting at 105°F.

Example: If you usually use about 2.5 gallons per minute (one shower with a water-saver showerhead and one hand sink) simultaneously, find the 2.5 GPM on the chart or the number closest to it. If the number is highlighted in GREEN, then it is the correct model for you. If it is highlighted in YELLOW, that means you can get by with it. If it is highlighted in RED, you should consider a more powerful model.

Electrical Requirements

Before purchasing an EcoSmart, please make sure that your home has sufficient electrical capacity. Please refer to this chart for electrical requirements:

Model Recommended
Maximum Amperage
@ 240 V
Recommended Household
Electrical Service
Recommended Minimum
Wire Gauge
ECO 27 3 x 40 AMPS DP 112.5 AMPS 200 AMPS 3 x #8 AWG Copper
ECO 24 3 x 40 AMPS DP 100 AMPS 200 AMPS 3 x #8 AWG Copper
ECO 18 2 x 40 AMPS DP 75.0 AMPS 150 AMPS 2 x #8 AWG Copper
ECO 11 1 x 60 AMPS DP 57.0 AMPS 125 AMPS 1 x #6 AWG Copper
ECO 8 1 x 40 AMPS DP 33.0 AMPS 100 AMPS 1 x #8 AWG Copper
POU 6 1 x 30 AMPS 29.0 AMPS 100 AMPS 1 x #10 AWG Copper
POU 3.5 1 x 30 Amps 29.0 AMPS 100 AMPS 1 x #10 AWG Copper

Wire gauge and breaker size must meet all applicable provincial, state, local, and national electrical codes for your area. These are only guidelines that may apply to most installations. Some codes require you to have an electrical sub-panel, especially if the heater is not mounted within the line-of-sight of the main electrical panel. Wiring should be sized to maintain a voltage drop of less than 3% under load.

If your home is already equipped with a lot of electrical appliances, you may require a larger electrical service than the one recommended in the chart. The above chart contains only guidelines. Please consult with an electrician before placing an order.

Download Installation Manual
Download Troubleshooting Guide for Electricians

Specification ECO 8 ECO 11
Voltage 240 240
Phase Single Single
KW 8 kW 13.6 kW
Elements 1 x 6 KW @ 208 V 2 x 6 KW @ 208 V
Amperage Draw 33 Amps 57 Amps
Required Breaker 40 DP 60 DP
Required Wire 8 AWG 2 x 6 AWG
Electrical Panel 100 Amps 125 Amps
HZ 50/60 50/60
Pipes fittings 1/2" NPT 1/2" CF
Dimensions (in.) 12" x 9.75" x 3.75" 12" x 9.75" x 3.75"
Weight 4.75 lbs. 6.5 lbs.
Exchanger Stainless Steel Stainless Steel
Protection Thermal Auto Thermal Auto
Temperature Control Digital Digital
Activation flow .25 GPM .25 GPM
Energy Efficiency 99.8 % 99.8 %
Certification: ETL Listed to UL 499 & CSA


Terms & Conditions

Save space. Look at how much space you save with our ondemand hot water heater compared to a water heater tank.

 Ecosmart Eco 8, Eco 11 Electric Tankless Hot Water Heater, Small

How much can you save with ECOSMART's Tankless Water Heaters?

The primary difference between savings associated with storage tank heaters compared to tankless heaters is the amount of energy and time consumed during operation. An electric tankless water heater consumes more energy compared to a tank heater during its use, but it consumes energy for a drastically shorter period of time. The result is a reduction in water heating costs by up to 60%.

The image below contains a visual representation of the concept mentioned above using data taken from independent third party testers. It shows how the storage tank heater keeps drawing power even after the need for hot water has long ceased. In this example, the tank heater used energy for 34.5 minutes just for a 10-minute shower. It also used a total of 2.5 kWh, in comparison to the ECO 27 which consumed just 1.6 kWh. The steadiness in the data represented about the ECO 27 is also an accurate indication of how precise the Self-Modulating Technology is, allowing for very minimal differences in energy consumption.

 Ecosmart Eco 8, Eco 11 Electric Tankless Hot Water Heater, Small

PSC (Product Safety Consulting, Inc.) is a product testing firm recognized internationally and accredited by several reputable organizations. PSC administered numerous tests that simulate daily hot water usage and then compared the energy consumption results between an ECO 27, the largest model available from ECOSMART, and a 40 gallon water heater from Rheem. Based on an average ten-minute shower consuming two gallons per minute, a 37% savings in energy consumption was confirmed with the ECO 27.  This figure is based on usage comparison and does not take into account energy loss associated with Cycling Loss and Standby-by Loss which may be accountable for up to 20% energy loss. This loss included, the ECO 27 uses up to 57% less energy compared to a standard electric storage tank water heater.

Summary: ECOSMART Testing Data

MPN:  ECO8;ECO11  UPC:  854920002183;854920002022

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