GREATBEAR 14KW ECO13 Electric Tankless Water Heater
$192.99 price checked August 2026
If you want to lower your monthly utility bills while maintaining a consistent temperature, this is the one to price-check.
The GREATBEAR ECO13 in Short
The GREATBEAR 14KW ECO13 Electric Tankless Water Heater is for homeowners seeking to reduce energy bills by up to 50% compared to traditional tank models.
Waiting for a tank to reheat after a long shower often results in a sudden drop in water temperature. This issue is common in older systems that cannot keep up with continuous demand.
The GREATBEAR 14KW ECO13 Electric Tankless Water Heater provides instant hot water without the need for preheating. It features a 14kW power output to maintain consistent temperatures as you adjust your settings.
We evaluated the GREATBEAR ECO13 against the other tankless water heater installation options we compared for this category. This review is for upgraders looking to replace a standard tank with a high-efficiency electric unit.
How Green Writer picked: we started from the 49 most-reviewed tankless water heater installation listings in our retail dataset, removed duplicates, accessories and off-category products, and 32 qualified. This product is one of 15 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the GREATBEAR ECO13
Best for: you need an energy-efficient hot water solution for a small space where a traditional tank is not an option.
The GREATBEAR ECO13 is a practical choice at the $192.99 price point.
- Pro: The 14kW power output provides instant hot water without the preheating wait of a standard tank.
- Pro: It features a digital display and touch control panel for precise temperature management between 86 and 131 degrees F.
- Pro: The unit is ETL certified and UL qualified, ensuring it meets recognized safety standards.
- Con: The 14kW power limits the flow rate compared to high-volume systems, which may result in a flow rate shortfall if multiple fixtures are used simultaneously.
- Con: The 240V requirement means it cannot be used on standard 120V household circuits.
Don’t buy this if: your household requires a flow rate above 3.5 GPM, as this 14kW unit cannot maintain that volume at high temperatures.
Price assessment: At $192.99, this model offers a fair price for a certified electric tankless unit with integrated leakage protection.
Green Writer score: 8/10 (data-driven – see “How we picked” above)
For a different configuration, read our full Noritz NRC66DVNG review.
If you need an external unit, see the best outdoor tankless hot water heater options.
Key Specifications
| Power | 14kW | |
| Voltage | 240V | |
| Temperature Range | 86 to 131 degrees F (30-55 degrees C) | |
| Certification | ETL certified, UL qualified | |
| Control Interface | Touch Control Panel with Digital Display | |
| Safety Features | Sensitive Leakage Protection, High Temperature Protection, Dry Heating Prevention | |
| Dimensions | 11″W x 15.75″H |
The 14kW power rating is the primary factor for determining how much hot water the unit can provide at once.
Before You Buy: GREATBEAR ECO13 Checklist
The first thing to check is your electrical infrastructure, as the 14kW power requirement of the GREATBEAR ECO13 necessitates a specific electrical capacity.
- ☐ Confirm your circuit can support 240V electricity — 240V
- ☐ Verify your electrical panel can handle a 14kW load — 14kW
- ☐ Check your required temperature range — 86 to 131 degrees F (30-55 degrees C)
- ☐ Ensure your installation site is ETL certified and UL qualified — ETL certified, UL qualified
- ☐ Budget for a professional installation to ensure the 240V wiring meets local safety codes
You should not buy this product if your existing electrical panel cannot support a 14kW load without a professional upgrade.
What the Numbers Mean in Use
Real Time Power Adjustment
Real time power adjustment on the GREATBEAR 14KW ECO13 allows the unit to modulate power input based on your flow rate and temperature settings. This technology helps you maintain consistent temperatures without the fluctuations common in standard units. Because it minimizes standby loss and radiation, you can expect a reduction in energy bills of up to 50% compared to typical tank heaters.
The GREATBEAR ECO13 provides 14kW of power, but because this is an electric tankless unit, your flow rate is limited by this power ceiling. To ensure a steady flow for a shower, you must confirm your local electrical service can support the 240V requirement. While the unit adjusts power in real time to prevent “cold water sandwiches” when turning a tap off and on, the 14kW limit means you should prioritize a high-efficiency showerhead, as the unit may struggle to maintain a high-flow 3.5 GPM output for a single shower.
Safety Protection Systems
Safety protection systems on the GREATBEAR ECO13 include sensitive leakage protection, high temperature protection, and dry heating prevention. These features ensure the internal electricity system remains completely separated from the water pipe, protecting your home from electrical hazards.
The GREATBEAR ECO13 is both ETL certified and UL qualified, meeting national safety standards for electrical appliances. These certifications, combined with the dry heating prevention, provide the technical assurance needed when installing a high-voltage 240V appliance in a residential environment.
Digital Touch Control
Digital touch control on the GREATBEAR ECO13 provides a digital display for precise temperature management between 86 and 131 degrees F (30-55 degrees C). You can set your desired temperature and receive immediate feedback on the display rather than guessing the output of a manual dial.
The touch interface on the GREATBEAR ECO13 allows for quick adjustments during use. Because the unit provides instant hot water without preheating, the digital interface ensures you can reach your target temperature immediately upon opening the valve.
New users should start with how a tankless water heater works to understand the technology.
How the GREATBEAR ECO13 Compares to Alternatives
The GREATBEAR ECO13 provides a 14kW power output, which ranks it as a higher-capacity option than the 9kW ECOTOUCH ECO90 and the 12KW Electric Tankless Hot Water Heater.
- The GREATBEAR ECO13 costs $6.99 less than the FOGATTI 14kW Tankless Water Heater Electric.
- The ECOTOUCH ECO90 9KW 240V Tankless Water Heater provides a lower power output of 9kW compared to the 14kW of this unit.
- The Electric Tankless Hot Water Heater 220/240V is priced at $150.88, which is $42.11 less than the GREATBEAR ECO13.
- The Novieex On Demand Natural Gas Water Heater offers a 4.3 GPM flow rate and 100,000 BTU power, while this electric unit operates on 240V power.
If you need a portable solution for camping or RV use, choose the HOTAITAI 6L Portable Propane Water Heater instead of this fixed 240V installation.
Compared to a standard tank heater for a small apartment, the GREATBEAR ECO13 provides instant hot water without the standby loss of a traditional tank. While a tank heater stores a large volume of water, this unit uses advanced thermal technology to reduce energy and utility bills by up to 50% compared to typical tank models. You should verify your home’s electrical capacity to ensure it can support the 240V requirement before choosing this over a standard tank.
Is the Price Right?
The GREATBEAR ECO13 is priced at $192.99, which sits $7 above the average of $186 for the similar tankless water heater installation products we compared. At this price point, you receive an ETL certified unit with a digital display and touch control panel, while some lower-priced models may lack these specific safety certifications or interface features.
The GREATBEAR ECO13 is the right choice if you want to reduce energy and utility bills by up to 50% compared to typical tank water heaters. To verify if this 50% saving applies to your specific home, you must calculate your current daily hot water usage and compare it against the 14kW power output of this unit.
Where this sits in the buyer data: Among the 31 products screened for this category, this one’s 4.2 rating places it #18, on 109 ratings – below the 170-rating median of that group, so treat the average as less settled than its comparables. On price it undercuts 26 of them.
What Buyers Still Want to Know About the GREATBEAR ECO13
Does the GREATBEAR 14KW ECO13 require a professional electrician for installation?
Yes, you must hire a licensed electrician to handle the wiring because the GREATBEAR ECO13 requires a 240V power supply. Electrical work of this scale must be performed by a qualified professional to ensure your home meets local safety codes and permits.
What is the flow rate of the GREATBEAR 14KW ECO13?
The GREATBEAR ECO13 provides an instant hot water supply, but you should verify the specific flow rate with the manufacturer to ensure it meets your household’s needs. For a standard shower, you generally need a minimum of 3.5 GPM, while high-efficiency models often target 1.2 GPM.
Can the GREATBEAR 14KW ECO13 handle multiple fixtures at once?
Because this unit has a 14kW power limit, it may experience a flow rate shortfall if you attempt to run multiple showers or a sink simultaneously. You should confirm if your specific usage matches the 14kW output before assuming it can support high-volume, multi-fixture demand.
Is the GREATBEAR 14KW ECO13 worth the $192.99 price tag?
If you are looking to reduce utility bills, the GREATBEAR ECO13 is a strong option as it is designed to reduce energy costs by up to 50% compared to typical tank water heaters. It also holds a 4.2 rating from 109 buyers, which supports its value as a budget-friendly on-demand solution.
Is the GREATBEAR ECO13 Right for You?
The GREATBEAR ECO13 suits 5 kinds of buyer and is the wrong choice for 4 jobs, listed below with the reason for each.
Who the GREATBEAR ECO13 is for, and what it does well
Who the GREATBEAR ECO13 suits
- RV owners — the 14kW power and compact tankless design provide instant hot water without the weight of a traditional tank
- Apartment renters — the compact size and 240V requirement allow for a space-saving hot water solution that reduces utility bills
- Tiny house builders — the advanced thermal technology and 50% energy savings make it ideal for off-grid or small-space living
- Homeowners in high-traffic bathrooms — the real-time power adjustment based on flow rate ensures consistent temperature for single-point use
- Budget-conscious homeowners — the ability to reduce energy and utility bills by up to 50% compared to tank heaters appeals to cost-saving goals
What the GREATBEAR ECO13 handles well
- Quick hand washing — the instant hot water feature provides immediate temperature without preheating
- Single-sink kitchen use — the 14kW power and real-time flow adjustment provide steady heat for one faucet
- Small bathroom showers — the 86 to 131 degrees F range provides safe and consistent temperatures
- Energy-efficient laundry pre-rinsing — the reduced standby loss and radiation technology lower the cost of frequent small uses
- Safety-conscious bathroom upgrades — the sensitive leakage protection and dry heating prevention provide peace of mind during installation
What the GREATBEAR ECO13 is the wrong choice for
- Simultaneous multi-shower use — the 14kW power limit restricts the volume of hot water available at once
- High-volume industrial cleaning — the 14kW power output is insufficient for heavy-duty continuous flow requirements
- Large family bath time — the flow rate-dependent power adjustment may struggle to maintain temperature for multiple high-flow fixtures
- Boiling water for large pots — the 131 degrees F maximum temperature limit prevents reaching boiling points
What to budget alongside the GREATBEAR ECO13, and what to skip
- External temperature controller — the built-in touch control panel and digital display handle temperature adjustments
- Standby heat insulation — the advanced thermal technology minimizes standby loss by design
- Manual override switches — the digital display and touch control panel provide the necessary interface
Where to Buy the GREATBEAR ECO13
These retailers sell Tankless Water Heater Installation generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- SupplyHouse (online only) — specialist focus on plumbing components and wholesale pricing
- Build.com (online only) — large online catalog with detailed technical specifications
- Home Depot (online and physical stores) — large selection of major brands and in-store pickup
- Lowe’s (online and physical stores) — wide inventory of residential units and local availability
- Amazon (online only) — extensive variety of models and fast shipping options
- Ferguson (online and physical stores) — specialist trade accounts and professional-grade selection
Final Verdict on the GREATBEAR ECO13
If you need an energy-efficient upgrade that reduces utility bills by up to 50% compared to a standard tank model, the GREATBEAR ECO13 is a strong choice at around $192.99.
The GREATBEAR ECO13 ranks well for its price point, supported by a 4.2 rating from 109 buyers and its ability to adjust power input in real time based on your specific flow rate and temperature needs.
Skip it if: you require a flow rate above the 3.5 GPM standard for multiple simultaneous fixtures, as a 14kW unit may provide a flow rate shortfall in high-demand scenarios.
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