Compact electric tankless · EcoSmart

EcoSmart ECO 11 13 kW Electric Tankless Water Heater

13 kW compact electric tankless, about 54 A at 240 V

13 kW240 V~54 A~1.3 GPM at 70°F rise

Updated October 2026

The short answer

A solid compact electric tankless for light use in mild climates.

Delivers
13 kW.
Watch for
Weak at a large winter rise.
Suits
Light use in mild climates.
Power
13
Voltage
240
Material
solid
Dimensions (seller)
5"W x 5"H
Product weight
6.5 lb
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What it delivers

The EcoSmart ECO 11 13 kW Electric Tankless Water Heater is a compact electric tankless rated at 13 kW on 240 volts.

At a 45°F rise (mild inlet water to a 120°F set point) it holds about 2.0 GPM, less than one 2 GPM shower; in winter, at a 70°F rise, about 1.3 GPM, less than one 2 GPM shower. Size it to your fixtures.

At 240 volts 13 kW is about 54 amps. Whether your panel can carry it alongside heating and cooking loads is an electrician's call.

It skips venting entirely, but the amps are the hurdle: check the panel before the plumbing.

From the listing: features: special_feature; material: solid; model: ECO 11.

The listing gives dimensions of 5 in (W) x 5 in (H), a weight of 6.5 lb and water-heaters in the box.

Right unit for this house?

Install it when

  • Light use in mild climates
  • Homes with no gas service

Look at another unit when

  • Panels without spare capacity
  • More than 1 shower at once in cold winters

Strengths and trade-offs

Strengths

  • 13 kW
  • No venting or gas line

Trade-offs

  • Weak at a large winter rise
  • Breaker needs not stated

Install limits

  • Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberECO 11Retailer
Dimensions (seller)5"W x 5"HRetailer
Features (seller)special_featureRetailer
Power13Retailer
Voltage240Retailer
Product weight6.5 lbRetailer
MaterialsolidRetailer

Rival units at this flow

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Final verdict

A solid compact electric tankless for light use in mild climates.

Buy this unit

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Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What breakers does the EcoSmart ECO 11 13 kW Electric Tankless Water Heater need?
About 54 amps at 240 volts (13 kW ÷ 240 V). Panel capacity, breakers and wire are confirmed by a licensed electrician from the manual.
How much hot water does the EcoSmart ECO 11 13 kW Electric Tankless Water Heater deliver in winter?
About 1.3 GPM at a 70°F rise and 2.0 GPM at a 45°F rise, estimated from its power and capped at its stated maximum.