Marey ECO150 Electric Tankless Water Heater 14.5kW - Compact On-Demand

In this review of the Marey ECO150 electric tankless water heater the bottom line is straightforward: this compact 14.5kW unit is best for homeowners in warmer regions who need a space-saving, on-demand hot water solution for one to two points of use. The ECO150 earns recommendation for its ETL certification, straightforward LCD temperature control and clear energy-saving premise, while caution is warranted around electrical installation requirements and mixed reports about build consistency and long-run reliability.

Key Features

• Electric 14.5kW / 240V: Delivers strong instantaneous heating power suited to small homes or up to two simultaneous points of use in Southern and Central climates.
• ETL Certified: Meets recognized safety and electrical standards, offering reassurance for residential installation.
• Compact footprint: At about 14.7in x 8.7in x 3.5in the unit installs in limited spaces where a tank unit would not fit.
• Energy on demand: Heats water only when needed, removing standby losses associated with conventional tank heaters and helping reduce energy use.
• LCD temperature control: Allows quick adjustment of output temperature for better comfort and potential energy optimization.
• Manufacturer support: Comes with a 5 year limited warranty and recommendation for professional installation for safety and compliance.

Who It's For

The ECO150 suits homeowners or renters in Southern and Central US regions where incoming water temperature remains relatively warm; it performs well for single showers, sinks, or a shower plus a sink running at the same time. Buyers who value compact design and eliminating standby energy from a traditional tank will appreciate its small footprint and straightforward controls.

It is not ideal for cold-climate installations where inlet water can be 55 F or lower - Marey recommends the larger ECO180 in those cases - and buyers without access to a 240V dedicated circuit and a 70 Amp double pole breaker should plan for professional electrical upgrades before purchase.

Pros & Cons

Pros

• Compact size that saves space and fits tight installation locations.
• ETL certification and LCD controls make operation simple and give safety assurance.
• On-demand heating reduces standby energy loss compared with tank models.
• Good value for users who need reliable hot water for one or two points of use.

Cons

• Requires a dedicated 220V-240V circuit with 70 Amp breaker and 6-gauge wiring, which can add installation cost.
• Customer reports are mixed on build consistency and long-term durability, with a few units failing or shutting down unexpectedly.

Specifications

Our Verdict

The Marey ECO150 is a practical, space-saving tankless option for those in warmer regions who need hot water for showers and sinks without the energy waste of a tank. It represents good value when paired with proper electrical setup and professional installation, but buyers should weigh reported variability in build quality and the strict wiring requirements before committing.

Frequently Asked Questions

Can this unit serve a whole house?
The ECO150 is best for up to two points of use and typically will not meet full house demand, especially in colder climates.

What electrical circuit is required?
It needs a dedicated 220V~240V circuit, a 70 Amp double pole breaker and 6-gauge wiring; professional installation is recommended.

Is it reliable for long showers?
Many customers report steady temperature for showers in warm inlet conditions, but there are mixed reviews about long-term durability and occasional shutdowns.