In an age where our homes are becoming ever smarter—from thermostats that learn our routines to refrigerators that track groceries—water heating technology has leapt into the smart era as well. Smart water heaters don’t just supply hot water on demand; they optimize energy use, alert you to leaks, and let you control temperature settings from your smartphone. If you’re looking to upgrade in 2025, here are the top smart water heaters that combine efficiency, convenience, and cutting‑edge connectivity.
Why Go Smart?
- Energy Savings
Smart scheduling and adaptive algorithms heat water during off‑peak hours, reducing utility bills and carbon footprint. - Leak Detection & Alerts
Integrated sensors notify you of leaks or excessive use, helping prevent costly water damage. - Remote Control & Monitoring
Adjust temperature, view usage data, and receive maintenance reminders right from your phone. - Enhanced Durability
Advanced diagnostics and tank‑protection features extend the system’s lifespan.
smart water heaters are modern, internet-connected water heating systems that allows users to monitor, control, and optimize their water heating remotely via a smartphone, tablet, or voice assistant (like Alexa or Google Assistant).
Key Features:
- Remote Control: Turn the heater on/off or adjust temperatures from an app.
- Scheduling: Set specific times for heating to save energy (e.g., mornings and evenings only).
- Energy Efficiency: Uses data and sensors to minimize energy consumption.
- Leak Detection & Alerts: Notifies users of water leaks or issues instantly.
- Usage Tracking: Provides insights into how much hot water you use and how much energy is being consumed.
Benefits:
- Saves money on electricity or gas bills.
- Enhances convenience and comfort.
- Increases home safety and water efficiency.
Smart water heaters brings intelligence and automation to one of the most energy-intensive appliances in your home.
Top 5 Smart Water Heaters:
1. GRS Tankless Water Heater Electric, 13KW 240 Volt
The GRS 13KW Tankless Electric Water Heater is a compact, wall-mounted unit designed to provide on-demand hot water for residential applications. Operating at 240 volts and delivering 13 kilowatts of heating power, it is suitable for small to medium-sized households, offering continuous hot water without the need for a storage tank.
✅ Key Features & Performance
- Instant Hot Water: Eliminates the need to wait for a tank to heat up, providing hot water on demand.
- Energy Efficiency: Designed to reduce energy consumption by heating water only when needed, potentially lowering utility bills.
- Compact Design: The wall-mounted unit saves space compared to traditional tank heaters, making it ideal for smaller installations.
- Safety Features: Includes overheat protection, child lock function, dry heating protection, and grounding protection to ensure user safety.
- Rust-Resistant Components: Constructed with materials that help prevent rust and scale buildup, potentially extending the heater’s lifespan.
👍 Pros
- Space-Saving: Its compact size allows for installation in tight spaces, freeing up room for other utilities or storage.
- Continuous Hot Water: Provides a steady supply of hot water, making it suitable for simultaneous use in multiple fixtures.
- Easy Installation: Designed for straightforward installation, reducing setup time and complexity.
- Durable Construction: Built with materials that resist corrosion, enhancing the unit’s longevity.
👎 Cons
- Electrical Requirements: Requires a 240V electrical supply, which may necessitate an upgrade to existing home wiring.
- Flow Rate Limitations: While suitable for small to medium households, it may not meet the hot water demands of larger households with multiple simultaneous fixtures.
- No Wi-Fi Connectivity: Lacks smart features such as remote control or monitoring via smartphone apps.
Final Verdict
The GRS 13KW Tankless Electric Water Heater offers a reliable and efficient solution for households seeking continuous hot water without the bulk of a traditional tank. Its compact design, energy-saving features, and safety mechanisms make it a solid choice for small to medium-sized homes. However, potential buyers should consider their household’s hot water demands and existing electrical infrastructure to ensure compatibility.
2. Tankless Water Heater Electric 13 KW 240Volts.
- Warm Prompt – Ensure this tankless water heater meets your installation requirements. It is rated at 13KW – 240 Volts with a maximum amperage of 57A. It requires 1 x 60 Amp DP breakers and 6# AWG wiring with ground. The unit dimensions are 9.7” (W) x 14 ” (H) x 3.4” (D), the water connection is 1/2″ NPT
- Endless Hot Water – WINTEMP Tankless Electric Water Heater – Provides a continuous supply of hot water in a short time, with instant hot water at 121℉ available within seconds. No need to wait for preheating, no more worries about running out of hot water in the tank, and no temperature fluctuations during showers.
3. 4 Gallon Capacity, 120-Volt – Ariston Andris 4-Gallon Mini Tank Electric Water Heater.
The Ariston Andris 4-Gallon Mini Tank Electric Water Heater is a compact and efficient solution for delivering hot water instantly at the point of use. With a 4-gallon capacity and 120-volt power requirement, it’s perfect for under-sink installation in kitchens, bathrooms, or garages. It heats water quickly and maintains temperature effectively, reducing the wait time associated with centralized systems.
Its sleek design fits easily in small spaces, and the adjustable thermostat allows for custom temperature settings. While it’s ideal for single-point use, its limited tank size may not be suitable for high-demand applications. Overall, it’s a reliable, space-saving water heater that’s easy to install and operate..
The Ariston Andris 4-Gallon Mini Tank Electric Water Heater is a compact and efficient solution for delivering hot water instantly at the point of use. With a 4-gallon capacity and 120-volt power requirement, it’s perfect for under-sink installation in kitchens, bathrooms, or garages. It heats water quickly and maintains temperature effectively, reducing the wait time associated with centralized systems.
Its sleek design fits easily in small spaces, and the adjustable thermostat allows for custom temperature settings. While it’s ideal for single-point use, its limited tank size may not be suitable for high-demand applications. Overall, it’s a reliable, space-saving water heater that’s easy to install and operate.
4. EcoSmart ECO 11 Electric Tankless Water Heater.
The EcoSmart ECO 11 is a compact, energy-efficient electric tankless water heater designed for small to medium applications such as bathrooms, kitchens, or office sinks. It features self-modulating technology that adjusts energy output based on water flow, helping reduce energy consumption. Delivering up to 2 gallons per minute, it’s capable of supporting one shower and a sink simultaneously in warmer climates.
The digital temperature control allows precise adjustment, while its sleek, wall-mounted design saves valuable space. However, in colder regions, its flow capacity may be limited. Overall, it’s a reliable and eco-friendly solution for on-demand hot water in low to moderate usage settings.
5. Rheem 18kW 240V Tankless Electric Water Heater, Gray.
The Rheem 18 kW 240 V Tankless Electric Water Heater (model RTEX-18) is designed to provide on-demand hot water for small to medium-sized households. Its compact, wall-mounted design is ideal for installations in tight spaces, such as under sinks or in utility closets.
Key Features:
- Flow Rate: Delivers up to 3.51 gallons per minute (GPM), suitable for simultaneous use of one to two fixtures, depending on inlet water temperature.
- Self-Modulating Technology: Adjusts energy consumption based on water flow, enhancing efficiency and reducing energy costs.
- Digital Temperature Control: Allows precise temperature settings in 1°F increments, providing consistent hot water.
- Electrical Requirements: Requires two 40-amp double-pole breakers and a 150-amp service panel.
- Installation: Professional installation is recommended due to the unit’s electrical requirements.
Pros:
- Energy Efficiency: Users report significant savings on energy bills due to the unit’s on-demand heating and self-modulating technology.
- Space-Saving Design: Its compact size frees up valuable space in small homes or apartments.
- Consistent Hot Water: Provides a steady supply of hot water, eliminating the need for a traditional tank.
Cons:
- Electrical Demands: The high power requirements may necessitate upgrades to existing electrical systems.
- Flow Rate Limitations: In colder climates, the flow rate may be insufficient to support multiple fixtures simultaneously.
- No Freeze Protection: The unit is not designed for installation in areas subject to freezing temperatures.
Conclusion:
The Rheem 18 kW Tankless Electric Water Heater is a reliable and efficient choice for households with moderate hot water demands. Its compact design and energy-saving features make it suitable for various applications, provided the electrical infrastructure can support its requirements. It’s an excellent option for those seeking to upgrade to a tankless system and reduce energy consumption.
Choosing the Right Smart Water Heaters.
- Type & Capacity
- Tank vs. Tankless: Tanks suit larger households with steady demand; tankless units save space and energy for moderate use.
- Sizing: Match capacity or flow rate to peak usage (e.g., simultaneous showers, dishwasher cycles).
- Connectivity & Control
- Ensure the companion app is well‑rated and supports scheduling, alerts, and usage analytics.
- Energy Efficiency
- Look for ENERGY STAR® certification or UEF (Uniform Energy Factor) ratings—higher is better.
- Installation & Maintenance
- Factor in installation costs (especially for heat pumps) and check if local rebates or utility incentives apply.
- Warranty & Support
- Smart diagnostics often extend warranties; choose brands with strong service networks.
Conclusion
Smart water heaters offer more than just hot water—they bring automation, savings, and peace of mind. Whether you’re drawn to the hybrid heat‑pump efficiency of the Rheem Performance Platinum or the on‑demand power of the Rinnai RXP160iN, there’s a 2025 model tailored to your needs. Upgrade today and take the first step toward a truly intelligent home.
