EcoSmart ECO 27 Tankless Electric Water Heater – 27 kW, Self-Modulating, Digital Temp Display, 3x9 kW Elements

Meet the EcoSmart ECO 27, a tankless electric water heater designed for homes with cold incoming water and higher hot water needs. This model uses self-modulating technology to adjust energy use to the actual heating requirement, helping to minimize energy waste while delivering hot water on demand. A digital temperature display lets you set the outlet water temperature in 1-degree increments for precise comfort.

Designed for colder climates or high flow scenarios, it stays ready when you need it most. Inlet water as cold as 37 degrees can be heated efficiently, with the unit capable of delivering about 2.7 to 3.0 gallons per minute depending on conditions. In many homes that rely on a large bath, Roman tub, or multiple fixtures, this unit offers scalable performance without the bulk of a tank.

Smart technology and build

• Self-modulating flow sensor adjusts heat output to the current demand.
• Three 9 kW heating elements with brass tops protect against electrolysis.
• Copper heat exchanger supports durable, efficient heat transfer.
• Automatic resettable thermostat ensures safe, user-friendly operation.

Key specs and energy efficiency

• Voltage: 240V; single phase; 27 kW total heating capacity.
• Energy efficiency: 99.8 percent theoretical, depending on installation and conditions.
• UL and CSA certified for standard safety and performance expectations.
• Weight: 11 lb; compact footprint supports wall mounting in tight spaces.
• Electrical requirements: three 40 A DP breakers; three runs of 8 AWG wire; 3/4 inch NPT piping; 112 A draw.

Why this matters in real homes: the compact size supports installation in utility closets or garages, leaving more room for storage or laundry. The digital display makes temperature management straightforward, reducing guesswork when you want a specific comfort level. The robust brass-topped elements and copper exchanger are designed for longevity and steady performance under variable water temperatures.

What to consider before you buy

• Verify that your electrical panel and wiring meet the 40 A DP breaker and 8 AWG needs.
• Check your incoming water temperature and flow requirements to estimate the expected GPM.
• Remember that performance depends on inlet temperature and simultaneous hot water draw.