Electric tankless water heaters can cut water heating costs by up to 50%, making them a smart choice for single-bathroom homes.
That efficiency is why models like the EcoSmart ECO 11 dominate with its patented self-modulating technology for precise temperature control.
Few realize a key advantage: compact, point-of-use units like the ThermoMate eliminate standby heat loss entirely by installing near the sink.
Our review covers the critical flow rate and electrical requirements to find the right model for your specific needs.
EcoSmart ECO 11 Tankless Water Heater
If you’re searching for the best electric tankless water heater for one bathroom, the EcoSmart ECO 11 is a game-changer that delivers endless, on-demand hot water in a remarkably compact package.
Pros
- The patented self-modulating technology is brilliant, providing consistent performance within one degree of your selected temperature.
- Its space-saving design is a huge advantage, being 90% smaller than a traditional tank and allowing for flexible wall or point-of-use installation.
- The energy efficiency is outstanding, operating at 99% thermal efficiency and only heating water when you need it, which saves money.
- It provides a perfect, continuous flow of hot water for a single bathroom or low-flow application without ever running out.
Cons
- The 54-amp electrical requirement is significant and necessitates professional installation to ensure your home’s wiring can support it.
- Your flow rate, between 1.3 and 3.1 gallons per minute, is dependent on your inlet water temperature, so colder climates may see reduced output.
For targeted applications like a single bathroom, this efficient and reliable unit absolutely earns its spot as the top choice.
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ThermoMate Electric Sink Water Heater
The ThermoMate Electric Sink Water Heater is designed to deliver instant hot water at a single faucet, making it a strong candidate for the best electric tankless water heater for one bathroom. Its compact, 10.95 by 7.4-inch frame installs under a sink to provide on-demand hot water, eliminating the wait and waste associated with traditional tank systems.
Pros
- Solves the cold-water wait: Provides hot water in seconds for a bathroom sink, improving daily routines.
- Space-saving design: Its tiny footprint fits easily in tight under-sink cabinets.
- Energy efficient operation: Self-modulating technology heats water only when needed, reducing energy costs.
- Precise temperature control: The digital panel allows adjustment in one-degree increments for personalized comfort.
- Durable construction: Features a scale-resistant cast aluminum heating element for long-term reliability.
Cons
- Specific electrical requirements: Requires a dedicated 240V circuit with a 30-amp breaker, which may need professional installation.
- Limited flow rate: With an output of 1.07 GPM, it is designed for a single point of use like a sink, not multiple fixtures simultaneously.
The ThermoMate performs reliably for its intended purpose. The self-modulating feature ensures consistent temperature while maximizing efficiency. It is best suited for homeowners or business owners needing a dedicated hot water source at one sink, particularly in bathrooms or kitchens where space is limited. The main considerations are ensuring your electrical system can support its 240V requirement and understanding its flow capacity. This unit offers excellent value by providing immediate convenience and utility savings for its targeted application.
The ThermoMate Electric Sink Water Heater is an ideal solution for upgrading a single-bathroom sink or a remote wet bar where installing traditional plumbing is impractical. It delivers efficient, instant hot water in a remarkably small package.
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SIVUATEK 14kW Tankless Water Heater
The SIVUATEK 14kW Tankless Water Heater is designed to provide an endless hot water supply for a single bathroom or a small apartment. Its compact, wall-mount design and 14kW power rating make it ideal for point-of-use applications like a bathroom sink and shower. This model solves the problem of running out of hot water and reduces energy costs by heating water only on demand.
Pros
- Solves the core issue of limited hot water, providing a continuous flow for one to two outlets.
- High energy efficiency eliminates standby heat loss common with traditional tank heaters.
- The intuitive digital display allows for precise temperature control in one-degree increments.
- Compact size saves significant space compared to bulky tank-style units.
- Includes multiple safety certifications and protections for reliable operation.
Cons
- Requires a substantial 60-amp dedicated electrical circuit, which may necessitate a professional upgrade.
- Its capacity is specifically suited for smaller demands; it is not a whole-house solution.
Performance is consistent for its intended scope. The self-modulating technology adjusts power based on flow rate, helping maintain a stable temperature. Installation is straightforward with accessible front wiring terminals, but the electrical requirement is its primary hurdle. This unit excels as the best electric tankless water heater for one bathroom, offering reliable performance without the space or energy waste of a tank. It represents strong value for homeowners or renters looking to upgrade a single bathroom’s hot water system, provided their electrical panel can support it.
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LECLOC Mini Tankless Water Heater
The compact, hard-wired design sets the LECLOC Mini Tankless Water Heater apart for single-point applications. This 6.5kW, 240V unit requires a dedicated 30-40 amp circuit and professional installation. Its core specification is clear: it is engineered to provide on-demand hot water for one sink at a time.
Key Advantages
- Simplified user interface featuring a large control knob and LED temperature display allows for quick adjustments between 86°F and 131°F.
- Built with multiple safety protections, including anti-leak circuitry, overheat cut-off, and IPX4 waterproof rating, which are rigorously tested.
- Constant temperature memory automatically recalls your last setting upon restart, enhancing convenience.
Limitations
- Not compatible
- The installation complexity is significant, requiring a specific high-voltage circuit that may necessitate costly electrical upgrades.
- The maximum output temperature of 131°F may be lower than some users prefer for certain tasks.
Best for homeowners or landlords needing an efficient, space-saving solution to instantly supply hot water to a remote bathroom sink or kitchenette, where electrical capacity already meets the strict requirements.
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Rheem 18kW Tankless Water Heater
If you’re on the hunt for a reliable, space-saving solution for a smaller home, the Rheem 18kW Tankless Water Heater is a fantastic contender. It’s our number five pick for good reason, offering serious performance in a compact package. This unit is engineered to deliver endless hot water precisely where you need it, making it a strong candidate for the title of best electric tankless water heater for one bathroom.
Pros
- The external digital control with LED display is a game-changer. Setting your perfect temperature with single-degree accuracy from across the room is incredibly convenient.
- Its advanced self-modulation technology is brilliant. It intelligently adjusts power to match demand, which saves energy without you ever feeling a temperature drop in the shower.
- Built with durable, field-serviceable copper heating elements, this heater is designed to last and simplifies any future maintenance.
- The installation is notably straightforward with bottom 3/4-inch NPT connections and a threaded design that makes replacement easier than wrestling with holiday lights.
Cons
- With a flow rate up to 4.4 GPM, it’s perfectly suited for a one-bathroom setup but may struggle if you try to run multiple hot water fixtures simultaneously in a larger home.
- As with any electric tankless model, ensuring your home’s electrical system can support this 240V, 18kW unit is an essential and potentially costly first step.
Overall, the Rheem 18kW provides efficient, on-demand hot water with smart features that justify its spot. For powering a single bathroom efficiently, it’s an excellent and persuasive choice.
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FAQ about the best electric tankless water heater for one bathroom:
1: What size electric tankless water heater is optimal for a single bathroom?
A unit with a capacity of 6-8 gallons per minute (GPM) is generally sufficient. This provides adequate flow for simultaneous use of a shower and another fixture, ensuring consistent hot water delivery.
2: Which electrical requirements are necessary for installation?
Most models require a dedicated 240-volt circuit with substantial amperage, often between 40-60 amps. A professional electrician must verify your home’s electrical panel has capacity to support this substantial load.
3: Are there specific features to prioritize for one bathroom?
Prioritize precise temperature modulation and a compact design. Self-modulating technology adjusts energy consumption to demand, enhancing efficiency for a single point of use.
4: What is the primary advantage over a traditional tank heater?
The principal benefit is on-demand hot water, eliminating standby heat loss. This provides an indefinite supply for sequential uses and reduces annual energy expenditure.
5: How does climate affect unit selection?
Colder inlet groundwater temperatures necessitate a unit with a higher temperature rise capability. Select a model rated for your region’s winter conditions to guarantee performance.
Conclusion
The EcoSmart ECO 11 provides robust, whole-house capability, ensuring a consistent and ample supply for a singular bathroom. Its sophisticated self-modulating technology adeptly manages energy consumption, offering a powerful solution for comprehensive needs.
Alternatively, the ThermoMate 6000W serves as a targeted, point-of-use apparatus, ideal for a specific fixture where immediate demand is paramount. Its compact design delivers precise efficiency for a focused application. Your ultimate selection hinges on prioritizing either expansive system coverage or dedicated, localized performance.
