EcoSmart ECO 18 Electric Tankless Water Heater Review: Compact Power with Smart Efficiency
The demand for efficient, space-saving, and reliable hot water solutions has grown rapidly as homeowners move away from bulky storage tanks. Electric tankless water heaters have become a popular alternative, especially in warm and moderate climates where incoming water temperatures are favorable. Among the most recognized names in this category, the EcoSmart ECO 18 Electric Tankless Water Heater stands out for its patented self-modulating technology, compact size, and lifetime warranty on critical components.
Designed for homes where incoming water temperatures are 62°F and above, the ECO 18 offers a balance between performance, efficiency, and affordability. This in-depth review explores the design, performance, energy efficiency, installation considerations, safety features, and ideal use cases of the EcoSmart ECO 18, helping you determine whether it is the right electric tankless water heater for your home.
Overview of the EcoSmart ECO 18 Electric Tankless Water Heater
The EcoSmart ECO 18 Electric Tankless Water Heater is a whole-home or multi-point electric water heater designed to provide hot water on demand without the limitations of a storage tank. Operating at 18 kW and 240 volts, this unit heats water instantly as it flows through the system, eliminating standby heat loss and ensuring hot water is available when needed.
Its compact dimensions, measuring just 17 x 14 x 3.5 inches, allow for flexible installation in tight spaces, making it an attractive choice for apartments, condos, and smaller homes. EcoSmart’s patented self-modulating technology continuously adjusts energy usage based on water demand, improving efficiency and reducing operating costs.
Key Features and Highlights
- 18 kW electric tankless performance
- Designed for climates with 62°F+ incoming water
- Capable of heating over 2.5 GPM
- Patented self-modulating technology
- Digital temperature control with 1-degree increments
- Compact and lightweight design
- Single-phase 240V operation
- Lifetime warranty on electronics, heat exchanger, and element
These features make the ECO 18 a reliable option for households seeking an efficient and modern water heating solution without the bulk of a traditional tank.
Product Specifications Table
| Feature | Specification |
|---|---|
| Brand Name | EcoSmart |
| Model Number | ECO 18 |
| Item Type | Electric Tankless Water Heater |
| Power Rating | 18 kW |
| Voltage | 240V |
| Phase | Single Phase |
| Maximum Flow Rate | Over 2.5 GPM |
| Recommended Climate | Incoming water temperature 62°F and above |
| Temperature Control | Digital, 1-degree increments |
| Dimensions | 17 x 14 x 3.5 inches |
| Color | White |
| Included Components | Electric tankless water heater |
| Unit Count | 1 |
| Manufacturer | EcoSmart |
| UPC | 854920002046 |
| GTIN | 00854920002046 |
| Warranty | Lifetime on electronics, exchanger, and element |
How Electric Tankless Water Heaters Work
Unlike traditional tank heaters that store and continuously reheat water, electric tankless water heaters heat water only when it is needed. When a hot water tap is opened, cold water flows through the unit, where powerful electric heating elements raise the temperature instantly.
The EcoSmart ECO 18 uses this on-demand approach to eliminate standby heat loss, reduce energy consumption, and provide consistent hot water without running out. This design is especially beneficial for homes with predictable hot water usage patterns.
Performance and Hot Water Output
The ECO 18 is capable of heating over 2.5 gallons per minute, making it suitable for small to medium households in warm climates. In practical terms, this means it can support:
- One shower and a sink simultaneously
- A shower with low-flow fixtures
- Multiple sinks used at different times
Because performance depends on incoming water temperature, the ECO 18 is best suited for regions where groundwater temperatures remain at or above 62°F. In colder climates, flow rates may be reduced, or a higher-capacity model may be more appropriate.
Patented Self-Modulating Technology Explained
One of the defining features of the EcoSmart ECO 18 Electric Tankless Water Heater is its patented self-modulating technology. This system automatically adjusts the amount of energy used based on real-time water flow and temperature demand.
Benefits of Self-Modulating Technology
- Uses only the energy required at any given moment
- Reduces electricity consumption during low-demand periods
- Improves temperature consistency
- Extends the lifespan of heating elements
By avoiding full-power operation when it is not necessary, the ECO 18 achieves greater efficiency compared to non-modulating electric tankless heaters.
Digital Temperature Control for Precision Comfort
The ECO 18 features a user-friendly digital temperature control panel that allows precise adjustments in 1-degree increments. This level of control ensures consistent water temperature for various household tasks.
Practical Advantages
- Customizable comfort settings
- Stable water temperature during use
- Easy adjustments for seasonal changes
Whether you prefer warmer water for showers or lower temperatures for handwashing, the digital control makes fine-tuning simple and intuitive.
Compact Design and Space-Saving Benefits
Measuring just 17 x 14 x 3.5 inches, the EcoSmart ECO 18 is significantly smaller than traditional tank water heaters. Its slim profile allows installation in places where space is limited.
Ideal Installation Locations
- Utility closets
- Laundry rooms
- Garages
- Under staircases
- Small mechanical rooms
The compact size also makes it easier to integrate into remodels or new construction projects without major layout changes.
Energy Efficiency and Cost Savings
Energy efficiency is one of the primary reasons homeowners choose electric tankless water heaters. The ECO 18 is designed to maximize efficiency by heating water only when it is needed and adjusting energy usage dynamically.
Key Efficiency Advantages
- No standby heat loss
- Self-modulating power consumption
- Reduced energy waste during low usage
- Optimized performance for warm climates
Over time, these features can lead to noticeable savings on electricity bills compared to traditional storage tank heaters.
Climate Considerations and Performance Expectations
The EcoSmart ECO 18 is specifically configured for climates where incoming water temperatures are 62°F and above. This makes it particularly well-suited for southern regions and moderate climates.
Performance by Climate Type
| Climate Type | Performance |
|---|---|
| Warm Climate | Excellent |
| Mild Climate | Very Good |
| Cold Climate | Limited flow rates |
In colder regions, homeowners may need a higher-capacity EcoSmart model to achieve the same flow rates.
Electrical Requirements and Installation Considerations
The ECO 18 operates on 240 volts and requires a dedicated electrical circuit. Proper electrical setup is essential for safe and reliable operation.
Key Electrical Requirements
- 240V single-phase power
- Proper circuit breakers
- Correct wire gauge
Due to these requirements, professional installation is often recommended to ensure compliance with local electrical codes and to maintain warranty coverage.
Safety Features and Reliability
Safety is a critical consideration for any electric water heater. The EcoSmart ECO 18 includes multiple built-in safety mechanisms designed to protect both the system and the user.
Safety Highlights
- Thermal protection to prevent overheating
- Digital temperature regulation
- Self-modulating power control
- Durable internal components
These features contribute to long-term reliability and peace of mind.
Warranty and Long-Term Value
EcoSmart backs the ECO 18 with a lifetime warranty on the electronics, heat exchanger, and heating element. This warranty reflects confidence in the product’s build quality and design.
Warranty Coverage Overview
- Lifetime coverage on key internal components
- Covers the cost of the heater
- Does not include labor or incidental damages
This level of warranty support enhances the long-term value of the unit and reduces concerns about replacement costs.
Comparison With Traditional Tank Water Heaters
| Feature | EcoSmart ECO 18 | Traditional Tank Heater |
|---|---|---|
| Hot Water Supply | On-demand | Limited by tank size |
| Energy Efficiency | High | Moderate |
| Space Requirement | Very compact | Large |
| Standby Heat Loss | None | Yes |
| Lifespan | Longer | Shorter |
The ECO 18 clearly excels in efficiency and space savings, making it an attractive upgrade for many households.
Comparison With Higher-Power Electric Tankless Models
While the ECO 18 offers excellent performance in warm climates, EcoSmart also offers higher-capacity models for colder regions or higher demand.
| Feature | ECO 18 | Higher kW Models |
|---|---|---|
| Power Output | 18 kW | 24–36 kW |
| Best Climate | Warm | Cold |
| Max Flow Rate | 2.5+ GPM | Higher |
| Electrical Demand | Moderate | High |
Choosing the right model depends on household size, climate, and hot water usage patterns.
Ideal Use Cases
The EcoSmart ECO 18 Electric Tankless Water Heater is best suited for:
- Small to medium households
- Apartments and condos
- Homes in warm or moderate climates
- Households with efficient fixtures
- Users seeking compact, energy-efficient solutions
It may not be ideal for large families in cold climates with high simultaneous water demand.
Maintenance and Longevity
Electric tankless water heaters generally require minimal maintenance. Periodic inspection and descaling, especially in areas with hard water, can help maintain efficiency and extend lifespan.
Maintenance Tips
- Periodic system flushing
- Monitoring temperature settings
- Checking electrical connections
With proper care, the ECO 18 is designed to provide reliable service for many years.
Final Assessment
The EcoSmart ECO 18 Electric Tankless Water Heater delivers an impressive combination of compact design, smart energy management, and reliable performance for homes in warm climates. Its patented self-modulating technology, precise digital temperature control, and lifetime warranty make it a compelling choice for homeowners seeking an efficient alternative to traditional tank heaters.
While it may not be the best option for colder regions or very high-demand households, the ECO 18 excels in its intended applications. For those looking to save space, reduce energy consumption, and enjoy on-demand hot water, this model offers strong value and dependable performance.