If you’re searching for smart tankless water heaters, you’re likely looking for efficient, Wi-Fi-enabled models that offer remote control and energy savings. The Electrolux 18kW Electric Tankless Water Heater stands out as the best overall choice thanks to its reliable performance and smart home integration. For those on a budget, the EcoSmart ECO 11 offers solid value, while the Westinghouse Smart Gas Model provides a good balance of power and smart features for larger households. These options reflect the main tradeoffs in this category: higher efficiency and smart features often come with increased costs and installation complexity. Continue reading for a full breakdown of these models and more to find the perfect fit for your home.
Key Takeaways
- Top models combine Wi-Fi control with reliable hot water delivery, but premium options tend to be more expensive.
- Electric units dominate the market, yet gas models like Westinghouse offer higher flow rates for larger households.
- Smart features such as Alexa or app control are standard on most leading picks, emphasizing convenience.
- Installation complexity varies; models with Wi-Fi often require more setup and professional help.
- Value varies significantly—spending more typically yields better build quality, longer lifespan, and smarter features.
| Electrolux 18kW Electric Tankless Water Heater with Smart WiFi & Alexa, 4.2 GPM |  | Best Overall for Whole-House Smart Control | Power Source: Electric | Voltage: 240 Volts | Wattage: 18 kW | VIEW LATEST PRICE | See Our Full Breakdown |
| EcoSmart ECO 11 Electric Tankless Water Heater |  | Best Value for Low-Flow Point-of-Use | Power: 13KW at 240 Volts | Amperage Draw: 54 A | Dimensions: 11.5 x 8 x 3.75 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| Rheem 11kW Tankless Electric Water Heater |  | Best for Adjustable Temperature and Cost Efficiency | Power Rating: 11kW | Voltage: 240V | Flow Rate: up to 2.68 GPM | VIEW LATEST PRICE | See Our Full Breakdown |
| 18kW Electric Tankless Water Heater by WINTEMP with WiFi Control and ETL Certification |  | Best for High Capacity with Safety and Smart Features | Power: 18kW (240V) | Max GPM: 4.3 GPM | Dimensions: 11.1″ W x 19.1″ H | VIEW LATEST PRICE | See Our Full Breakdown |
| 27kW Electric Tankless Water Heater with WiFi Control and ETL Certification (WM27V Plus) |  | Best for Large Households and High Demand | Power Source: Electric/AC | Wattage: 27,000 watts | Flow Rate: 6.5 GPM | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse Smart Tankless Water Heater Gas Indoor with 7.9 GPM and WiFi App Control |  | Best Overall for Gas-Powered Tankless Water Heaters | Power Source: Gas | Flow Rate: 7.9 Gallons Per Minute | Heat Output: 180,000 BTU | VIEW LATEST PRICE | See Our Full Breakdown |
| EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4 |  | Best Value Electric Tankless for Low-Flow Needs | Power Source: Cordless Electric | Wattage: 8,000 Watts | Flow Rate: 2 Gallons Per Minute | VIEW LATEST PRICE | See Our Full Breakdown |
| WINTEMP 27kW Electric Tankless Water Heater with WiFi Control and LED Display | | Best for High-Flow Electric Heating in Moderate Climates | Power Source: AC | Wattage: 27,000 Watts | Flow Rate: 6.5 GPM | VIEW LATEST PRICE | See Our Full Breakdown |
| APUS Tankless Propane Water Heater, 140,000 BTU, 6.8 GPM, Smart Wi-Fi Control |  | Best for Instant Hot Water in Propane-Powered Setups | BTU Output: 140,000 BTU | Flow Rate: 6.8 GPM | Fuel Type: Propane | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse Apolo Mini 6.5kW Tankless Water Heater Electric, Smart WiFi Control for Under Sink Use |  | Best Compact Electric Under-Sink Heater with Smart WiFi | Power Source: Hard Wiring | Wattage: 6,500 Watts | Maximum Temperature: 130°F | VIEW LATEST PRICE | See Our Full Breakdown |
| Electrolux 14kW Electric Tankless Water Heater with Smart WiFi & Alexa |  | Best Overall for Small Households with Smart Control | Power Source: Hard Wiring Required | Wattage: 14 kW | Voltage: 240 Volts | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse 18kW Electric Tankless Whole House Water Heater |  | Best for Larger Households Needing Multiple Fixtures | Power: 18kW / 240V / 75A | Flow Rate: 0.5-4.2 GPM | Temperature Range: 86-140°F | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse Tankless Water Heater Electric 14kW 240V |  | Best Compact Unit for Small Spaces with Smart Features | Voltage: 240V | Power Output: 14kW | Max Flow Rate: 3.38 GPM | VIEW LATEST PRICE | See Our Full Breakdown |
| Electrolux 11kW Tankless Water Heater Electric – Smart WiFi & Alexa |  | Best for Budget-Conscious Small-Scale Use | Power: 11kW | Voltage: 240V | Max Flow Rate: 2.6 GPM | VIEW LATEST PRICE | See Our Full Breakdown |
More Details on Our Top Picks
Electrolux 18kW Electric Tankless Water Heater with Smart WiFi & Alexa, 4.2 GPM
This Electrolux model stands out for its rapid hot water delivery—just 3 seconds—and its seamless integration with smart home systems, including Alexa. Compared with the WINTEMP 18kW, it offers a slightly higher flow rate and more advanced WiFi features, making it ideal for those seeking a truly connected experience. The main tradeoff is its high electrical demand: it requires a dedicated 240V/40A circuit with significant wiring upgrades, which can increase installation costs. While it excels for whole-house use in 2-3 bathroom homes, households with simultaneous high-power appliances might find it less suitable.
Pros:- Instant hot water with no wait time
- Smart WiFi and Alexa control for easy temperature management
- Energy savings up to 60% over traditional systems
- ETL certified for safety and reliability
Cons:- Requires high-power electrical setup (240V/40A circuit)
- Installation complexity increases costs
- Not suitable for households with simultaneous high-power appliances
Best for: Homeowners wanting a reliable, smart-enabled solution for multiple bathrooms with quick hot water delivery.
Not ideal for: Small apartments or homes without a dedicated high-capacity electrical panel, due to its power requirements.
- Power Source:Electric
- Voltage:240 Volts
- Wattage:18 kW
- Max Flow Rate:4.2 GPM
- Max Temperature:140°F
- Dimensions:14.1″ W x 18.7″ H
- Weight:15.4 Pounds
- Special Features:Smart WiFi, Alexa Voice Control, Scale Inhibitor
Bottom line: This model is best for tech-savvy homeowners with ample electrical capacity seeking whole-house smart hot water control.
EcoSmart ECO 11 Electric Tankless Water Heater
The EcoSmart ECO 11 is a compact, highly efficient unit designed for small-scale hot water needs, such as a single bathroom sink or low-flow shower. Compared to the larger Electrolux, it offers a lower flow rate (up to 3.1 GPM) but is perfect for point-of-use applications due to its small size and high thermal efficiency of 99%. Its limited flow capacity makes it less suitable for whole-house scenarios but ideal for budget-conscious buyers prioritizing space-saving technology. The main tradeoff is its high amperage draw—54A—that might necessitate electrical upgrades.
Pros:- Exceptional 99% thermal energy efficiency
- Space-saving, compact design
- Consistent temperature control within 1°F
- Ideal for point-of-use applications
Cons:- High amperage (54A) may require electrical upgrades
- Limited to low-flow applications
Best for: Small households or individuals needing reliable hot water for a single sink or shower in tight spaces.
Not ideal for: Large families or homes with multiple bathrooms expecting simultaneous hot water use.
- Power:13KW at 240 Volts
- Amperage Draw:54 A
- Dimensions:11.5 x 8 x 3.75 inches
- Thermal Efficiency:99%
- Flow Rate:1.3-3.1 GPM
Bottom line: This heater is perfect for small spaces and low-demand scenarios, but unsuitable for whole-house use in larger homes.
Rheem 11kW Tankless Electric Water Heater
This Rheem model offers straightforward control with an on/off dial and digital temperature display, making it accessible for those new to tankless systems. Its flow rate of up to 2.68 GPM suits small households or single fixtures. Compared to the EcoSmart ECO 11, it provides slightly less capacity but benefits from a self-modulating power system that adjusts energy use based on demand. The main drawback is its higher energy consumption relative to lower-wattage models, and it still requires a dedicated 240V circuit, which might involve electrical upgrades.
Pros:- Digital temperature display for precise control
- Self-modulating power reduces waste
- Adjustable dial for easy temperature setting
- Reliable on-demand hot water
Cons:- Requires dedicated 240V circuit
- Higher energy consumption than lower-wattage models
Best for: Homeowners seeking adjustable temperature control with moderate hot water needs and simpler operation.
Not ideal for: Homes expecting simultaneous multiple fixtures or high hot water demand, due to its limited flow rate.
- Power Rating:11kW
- Voltage:240V
- Flow Rate:up to 2.68 GPM
- Water Connections:1/2″ NPT
Bottom line: Ideal for small households wanting simple, adjustable, on-demand hot water without smart features.
18kW Electric Tankless Water Heater by WINTEMP with WiFi Control and ETL Certification
The WINTEMP WN18 combines relatively high flow capacity—up to 4.3 GPM—with advanced safety features and WiFi control, making it a strong choice for those who need reliable hot water in moderate-sized homes. It offers self-modulating energy efficiency, similar to the Electrolux, but with a more space-conscious, wall-mounted design that saves 90% more space. The main tradeoff is its substantial electrical demand—requiring 150A service and professional installation—making it less suitable for homes without high-capacity electrical panels.
Pros:- Up to 4.3 GPM flow rate for multiple fixtures
- Energy-efficient self-modulating technology
- WiFi control for remote temperature management
- ETL safety certification
Cons:- Requires 150A household service
- Higher upfront installation costs
- Best suited for homes with high electrical capacity
Best for: Families in moderate-sized homes seeking reliable, safe, and remotely controllable hot water systems.
Not ideal for: Small apartments or homes with limited electrical capacity, due to its high power requirements.
- Power:18kW (240V)
- Max GPM:4.3 GPM
- Dimensions:11.1″ W x 19.1″ H
- Electrical Requirements:2 x 40A DP breakers, 8/2 AWG wiring
- Certification:ETL
Bottom line: This unit offers a powerful combination of capacity, safety, and smart control for well-equipped homes with sufficient electrical service.
27kW Electric Tankless Water Heater with WiFi Control and ETL Certification (WM27V Plus)
The WM27V Plus delivers impressive hot water capacity with a flow rate of 6.5 GPM, making it suitable for large households with multiple bathrooms or heavy hot water use. Its WiFi app allows remote control and usage tracking, aligning with modern smart home trends. Compared with the WINTEMP 18kW, it provides a significantly higher flow rate, but at the cost of increased electrical demands—requiring 3×40A breakers and professional installation. Its price isn’t specified here, but the high power needs mean a substantial upfront investment.
Pros:- Provides endless hot water with high flow capacity
- Smart WiFi app for remote control and monitoring
- Self-modulating technology for energy efficiency
- Compact wall-mounted design saves space
Cons:- Requires 200A household service
- High electrical requirements with multiple breakers
- Potentially high installation costs
Best for: Large families or households with high simultaneous hot water needs seeking smart, remote management.
Not ideal for: Small homes or apartments with limited electrical capacity or budget constraints.
- Power Source:Electric/AC
- Wattage:27,000 watts
- Flow Rate:6.5 GPM
- Maximum Temperature:140°F
- Dimensions:13″W x 15.9″H
Bottom line: This heater suits large households with high hot water demands and smart home integration needs, provided electrical capacity is available.
Westinghouse Smart Tankless Water Heater Gas Indoor with 7.9 GPM and WiFi App Control
This Westinghouse model stands out for providing reliable, continuous hot water for up to 5 fixtures with a flow rate of 7.9 GPM, making it ideal for larger households. Compared with electric options like the EcoSmart ECO 8, it offers higher flow capacity suitable for whole-house use, but the tradeoff is the need for professional gas line installation, which adds complexity and cost. Its WiFi app control offers remote temperature adjustments and real-time monitoring, a feature not available on many traditional gas models. The high BTU output of 180,000 ensures rapid heating, yet the gas setup and venting requirements make it less suitable for DIY installation. Precise ±1°F temperature stability guarantees comfort, while CSA certification adds peace of mind. This pick makes the most sense for homeowners seeking a scalable, smart gas heater capable of handling multiple fixtures simultaneously.
Pros:- Provides endless hot water for up to 5 fixtures simultaneously
- WiFi app control for remote temperature adjustment and monitoring
- ±1°F temperature stability for consistent comfort
- Compact wall-mounted design saves space
Cons:- Requires professional installation due to gas and venting needs
- WiFi setup can be complex for non-tech-savvy users
Best for: Families needing a high-capacity, WiFi-enabled gas water heater for whole-house use
Not ideal for: Apartment dwellers or those with limited space and no access to professional gas installation
- Power Source:Gas
- Flow Rate:7.9 Gallons Per Minute
- Heat Output:180,000 BTU
- Maximum Temperature:165°F
- Mount Type:Wall-Mounted
- Efficiency:High Efficiency
- Maximum Pressure:150 PSI
Bottom line: This model is best for those needing a reliable, smart gas heater capable of servicing multiple fixtures at once, willing to handle installation complexity.
EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4
This EcoSmart ECO 8 makes sense for small-scale applications where space and budget matter. Its 8 kW power output and 2 GPM flow rate are suitable for heating a single low-flow fixture, such as a bathroom sink, especially in warmer climates where incoming water temperature exceeds 67°F. Compared with the WINTEMP 27kW model, it offers a more affordable entry point but sacrifices capacity for larger households or multiple fixtures. Its digital temperature control allows precise setting in 1-degree increments, yet its limited flow means it’s not fit for shower use or simultaneous multiple fixtures. The high efficiency of 99.8% reduces energy costs, but installation requires a dedicated 240V circuit and can be complicated if electrical capacity is limited. This pick is well suited for singles or small apartments needing a reliable, budget-friendly electric solution.
Pros:- Affordable price point for electric tankless heaters
- Digital temperature control in 1-degree steps
- High efficiency (99.8%) reduces energy costs
- Compact size fits small spaces
Cons:- Limited to heating only up to 2 GPM, not suitable for showers
- Requires dedicated 240V electrical circuit, which may need upgrades
Best for: Single occupants or small apartments with low hot water demands
Not ideal for: Large families or homes with multiple fixtures needing simultaneous hot water
- Power Source:Cordless Electric
- Wattage:8,000 Watts
- Flow Rate:2 Gallons Per Minute
- Efficiency:99.8%
- Mount Type:Wall
- Dimensions:12 x 8 x 4 inches
Bottom line: This model is ideal for small-scale, low-flow applications in space-constrained settings where budget and energy efficiency are priorities.
WINTEMP 27kW Electric Tankless Water Heater with WiFi Control and LED Display
The WINTEMP 27kW model is designed for larger households or homes in moderate climates where incoming water temperature exceeds 67°F. Its high wattage allows a flow of 6.5 GPM, supporting multiple fixtures simultaneously, and the WiFi control enables remote temperature adjustments, similar to the WINTEMP 18kW model but with greater capacity. Compared to the EcoSmart ECO 8, it offers a higher flow rate suitable for whole-house use, but at a higher electrical demand. Its self-modulating technology ensures efficient operation, while the LED display simplifies temperature management. Installation requires a 240V circuit capable of 113A max, which may involve electrical upgrades. Its safety features, including overheat and leak protections, make it a reliable choice for busy households.
Pros:- Supports up to 6.5 GPM flow, suitable for multiple fixtures
- WiFi control for remote temperature adjustments
- Self-modulating energy consumption for efficiency
- LED display for easy operation
Cons:- Requires a significant electrical upgrade (113A max load)
- Installation can be complex and costly
Best for: Large households in moderate climates seeking a high-capacity electric heater with smart control
Not ideal for: Homes with low electrical service capacity or in very cold climates
- Power Source:AC
- Wattage:27,000 Watts
- Flow Rate:6.5 GPM
- Maximum Temperature:140°F
- Efficiency:Self-modulating (up to 99%)
- Mount Type:Wall
Bottom line: This heater suits larger households in moderate climates that can support its electrical demands and want smart remote control features.
APUS Tankless Propane Water Heater, 140,000 BTU, 6.8 GPM, Smart Wi-Fi Control
The APUS propane model delivers immediate hot water with a robust 140,000 BTU burner, supporting up to 6.8 GPM, making it ideal for homes with propane fuel and high hot water needs. Its smart Wi-Fi app enables remote control, similar to electric models like the WINTEMP, but with the advantage of propane’s higher energy density. Compared to electric units, it offers greater flow capacity without requiring extensive electrical upgrades, but installation involves gas line hookup and venting, potentially increasing complexity. The ECO mode improves energy efficiency by reducing consumption when full output isn’t needed. Advanced safety features, including freeze protection, make it suitable for colder climates, though users must be prepared for more involved setup and maintenance. It’s a strong choice for propane-powered homes wanting smart features and high flow rates.
Pros:- Supports up to 6.8 GPM flow for multiple fixtures
- Smart Wi-Fi app for remote control and monitoring
- High BTU output ensures quick hot water delivery
- Energy-efficient ECO mode reduces consumption
Cons:- Requires manual draining in cold climates below 41°F to prevent freezing
- Installation involves gas line and venting, increasing complexity
Best for: Homes with propane systems needing high-flow instant hot water with smart controls
Not ideal for: Properties lacking access to propane or where installation cost and complexity are prohibitive
- BTU Output:140,000 BTU
- Flow Rate:6.8 GPM
- Fuel Type:Propane
- Wi-Fi Control:Yes
- Energy Efficiency:40% more efficient than traditional
Bottom line: Ideal for propane-based homes seeking high flow rates and smart remote control, with readiness for complex installation and maintenance.
Westinghouse Apolo Mini 6.5kW Tankless Water Heater Electric, Smart WiFi Control for Under Sink Use
This compact Westinghouse Apolo mini is tailored for single faucet or vanity applications, making it perfect for point-of-use hot water needs. Its 6.5kW output supports instant hot water at a maximum of 130°F, with smart WiFi integration compatible with Alexa and Google Home, providing convenient remote control. Compared to bulkier whole-house models like the WINTEMP 27kW, it offers a space-saving solution for small spaces or secondary points of use. Its anti-scale protection and waterproof IPX4 rating enhance durability, but professional installation of electrical wiring and plumbing is required. The limited capacity means it can’t serve showers or multiple fixtures, making it less suitable for larger households. This pick is ideal for those seeking a reliable, smart under-sink heater for a single fixture.
Pros:- Provides instant hot water for single fixture
- Compact size (2.48″W x 8.07″H)
- Smart WiFi control compatible with Alexa/Google
- Anti-scale protection and waterproof design
Cons:- Requires professional electrical and plumbing installation
- Limited to 6.5kW output, not suitable for multiple fixtures
Best for: Homeowners needing instant hot water for a single sink or vanity in small spaces
Not ideal for: Families or homes requiring hot water for multiple fixtures or showers
- Power Source:Hard Wiring
- Wattage:6,500 Watts
- Maximum Temperature:130°F
- Dimensions:2.48″W x 8.07″H
- Waterproof Rating:IPX4
- Warranty:1-year limited
Bottom line: This under-sink model is perfect for individual point-of-use hot water needs in small spaces, with smart control features and professional installation requirements.
Electrolux 14kW Electric Tankless Water Heater with Smart WiFi & Alexa
This Electrolux model stands out for its rapid heating, delivering hot water in just 3 seconds, and its smart features that enable remote control via WiFi and Alexa. Unlike larger units like the Westinghouse 18kW, its compact size makes it perfect for small spaces, but the 3.4 GPM flow rate limits simultaneous use. Its energy efficiency of 99.8% can reduce utility bills significantly, yet it demands a dedicated 60A electrical circuit, which might be a hurdle for some installations. The combination of quick hot water and smart convenience makes it an excellent choice for singles or couples with minimal simultaneous fixtures, but not suited for larger households or those with complex electrical setups.
Pros:- Provides hot water in just 3 seconds
- Smart WiFi and Alexa voice control
- Highly energy-efficient with 99.8% efficiency
- Compact design saves space
Cons:- Requires dedicated 60A electrical wiring
- Flow rate may be insufficient for multiple fixtures
Best for: Small households or singles who want instant hot water and smart control in a limited space.
Not ideal for: Households with multiple simultaneous fixtures or limited electrical capacity.
- Power Source:Hard Wiring Required
- Wattage:14 kW
- Voltage:240 Volts
- Flow Rate:3.4 GPM
- Maximum Temperature:140°F
- Efficiency:99.8%
- Dimensions:8.9″W x 12.8″H
- Weight:7.8 Pounds
Bottom line: This model is ideal for small households seeking quick, smart hot water with minimal space requirements.
Westinghouse 18kW Electric Tankless Whole House Water Heater
Compared to the smaller Electrolux unit, the Westinghouse 18kW can handle up to 4.2 GPM, making it suitable for whole-house hot water needs. Its copper heating elements heat water 50% faster than stainless steel models, which translates into quicker recovery times for multiple fixtures. The unit’s smart WiFi control with Alexa and Google compatibility adds convenience for tech-savvy users, and its self-modulating technology ensures precise temperature regulation, reducing energy waste. However, the high 75A electrical requirement and larger size mean professional installation and a robust electrical panel are necessary. This heater caters well to larger families or homes with multiple bathrooms, but the investment and installation complexity are notable tradeoffs.
Pros:- Handles up to 4.2 GPM for whole house use
- Copper heating elements heat water faster
- Smart WiFi control with voice assistant compatibility
- Self-modulating for energy savings and precise temperature control
Cons:- Requires professional installation due to high amperage (75A)
- Higher upfront cost compared to smaller units
Best for: Large households or homes with multiple bathrooms demanding reliable on-demand hot water.
Not ideal for: Small apartments or homes with limited electrical capacity due to high amperage needs.
- Power:18kW / 240V / 75A
- Flow Rate:0.5-4.2 GPM
- Temperature Range:86-140°F
- Dimensions:18.7″×3.94″×14.17″
- Certification:ETL Certified
- Efficiency:Up to 50%
Bottom line: This heater is best suited for large households needing robust, smart hot water delivery but with a higher installation and cost commitment.
Westinghouse Tankless Water Heater Electric 14kW 240V
This Westinghouse model emphasizes space-saving design with a compact, wall-mounted profile, similar in power to the Electrolux 14kW but with a slightly lower flow rate of 3.38 GPM. Its IPX4 water resistance and safety features make it suitable for more exposed environments, while smart WiFi control with Alexa and Google Home enhances usability. It offers reliable hot water for one to two fixtures, making it ideal for small apartments or under-sink applications. Compared with the Electrolux, it has a slightly higher flow rate but may lack the same sleekness in smart features or quick heating. Its electrical requirement is similar, demanding a 60A circuit, and installation complexity remains a consideration.
Pros:- Space-efficient, wall-mounted design
- Smart WiFi and voice control
- Water-resistant with IPX4 certification
- Provides continuous hot water for 1-2 fixtures
Cons:- High amperage electrical requirement (59A)
- Flow rate may be insufficient for multiple fixtures
Best for: Small homes or apartments needing space-efficient, smart hot water with reliable performance.
Not ideal for: Large households with high simultaneous hot water demand or complex plumbing needs.
- Voltage:240V
- Power Output:14kW
- Max Flow Rate:3.38 GPM
- Starting Flow Rate:0.5 GPM
- Current Draw:59A
- Certifications:ETL Certified, IPX4
Bottom line: This compact, smart heater suits small spaces and light usage, but may fall short in larger households or high-demand scenarios.
Electrolux 11kW Tankless Water Heater Electric – Smart WiFi & Alexa
The Electrolux 11kW unit is a more affordable, lower-capacity option ideal for households with minimal hot water needs. Its flow rate of 2.6 GPM makes it perfect for one or two fixtures, but it won’t handle simultaneous large demands as well as higher-wattage models like the Westinghouse 18kW. The smart WiFi and Alexa features make remote adjustments straightforward, and its energy-saving potential can cut electricity costs by up to 60%. However, it requires a substantial electrical panel (at least 150A), and its limited flow rate restricts its utility in busier households. This pick makes the most sense for singles or couples with modest hot water needs who appreciate smart controls and energy savings.
Pros:- Affordable entry point with smart control
- Energy-efficient, with potential savings up to 60%
- Suitable for small households with light hot water demands
- Compact and easy to install
Cons:- Limited flow rate of 2.6 GPM
- Requires a high-capacity electrical panel (150A+)
- Not suitable for multiple fixtures at once
Best for: Singles or couples with low hot water demand seeking smart control and cost savings.
Not ideal for: Larger families or homes with multiple fixtures that require higher flow rates simultaneously.
- Power:11kW
- Voltage:240V
- Max Flow Rate:2.6 GPM
- Points of Use:1-2
- Smart Features:WiFi & Alexa
- Electrical Requirements:60A, 8 AWG
Bottom line: This model is well-suited for small households prioritizing budget, smart features, and energy efficiency over high flow capacity.
How We Picked
I evaluated these smart tankless water heaters based on performance, ease of use, build quality, smart feature integration, and value for money. Reliability and consistent hot water delivery were primary considerations, along with how intuitive and responsive the smart controls are. I prioritized models that balance power with ease of installation, especially for typical residential setups. Devices that offered seamless Wi-Fi connectivity, compatibility with smart home ecosystems, and certifications for safety and efficiency ranked higher. These criteria ensure that the selected options serve a wide range of needs, from budget-friendly solutions to premium, feature-rich models.Factors to Consider When Choosing Smart Tankless Water Heaters
Choosing the right smart tankless water heater involves more than just smart features. You need to consider capacity, energy source, installation requirements, and compatibility with your home’s existing systems. Understanding these factors helps avoid common pitfalls, like undersizing units for your household or opting for incompatible smart platforms. This guide will walk you through key considerations to make an informed decision that balances convenience, efficiency, and long-term value.Flow Rate and Capacity
Ensuring your heater can supply enough hot water for your household is paramount. Measure your peak demand—typically the number of fixtures used simultaneously—and select a unit with a flow rate that meets or exceeds this. Undersized units will struggle during high demand, while oversized models may waste energy and cost more upfront. Always match capacity to your household’s needs for reliable performance.
Energy Source and Efficiency
Electric models are common and easy to install, but gas-powered units often provide higher flow rates suitable for larger households. Pay attention to energy efficiency ratings and certifications, as these impact long-term operating costs. A more efficient unit can save money over time, even if it has a higher upfront price, especially in areas with high energy costs.
Smart Features and Compatibility
Look for models that integrate seamlessly with your existing smart home system, whether Alexa, Google Assistant, or proprietary apps. Verify the reliability of the Wi-Fi connection and user interface, as these affect daily convenience. Keep in mind that more advanced smart features may require a stable internet connection and some technical setup, which can be a hurdle for less tech-savvy users.
Installation and Space Requirements
Proper installation is critical for safety and efficiency. Some units are compact and suitable for under-sink use, while others are designed for whole-house installation, requiring more space and professional help. Gas models often need venting and extra clearance, increasing complexity. Assess your space and installation skills before purchasing.
Price, Warranty, and Maintenance
Initial costs vary widely, with premium models offering advanced features and longer warranties. Cheaper units may save money upfront but could require more frequent repairs or replacement. Consider the manufacturer’s warranty and the availability of service, as well as maintenance requirements like flushing or replacing filters, to gauge overall value.
Frequently Asked Questions
Can I install a smart tankless water heater myself?
While some electric models are designed for DIY installation, most smart tankless water heaters, especially gas-powered ones, benefit from professional setup due to electrical, plumbing, and ventilation requirements. Proper installation ensures safety, optimal performance, and warranty validity. If you lack experience with such systems, hiring a licensed technician is strongly recommended to avoid costly mistakes and ensure compliance with local codes.
Are smart tankless water heaters compatible with all smart home systems?
Most leading models support popular voice assistants like Alexa or Google Assistant, but compatibility can vary. Always check the product specifications to confirm integration options and whether the app or voice control features work with your existing setup. Some models require additional hubs or bridges, which can add to complexity and cost.
How much energy can I save with a smart tankless water heater?
Smart features like remote control and scheduling can reduce energy waste by heating water only when needed and adjusting operation based on usage patterns. However, actual savings depend on your household habits, local energy rates, and the unit’s efficiency. A well-chosen, correctly sized smart heater can lower utility bills over time compared to traditional systems.
What is the typical lifespan of a smart tankless water heater?
Most high-quality units last between 10 and 20 years with proper maintenance. Regular flushing and inspections help prevent mineral buildup and prolong operational life. Investing in a model with a good warranty provides peace of mind, especially for units with advanced smart features that might be more complex to repair.
Is a smart tankless water heater suitable for large households?
Yes, but only if the unit has sufficient flow rate and capacity to meet peak demand. Gas models generally provide higher flow rates, making them a better choice for bigger households, while electric units may require multiple units or larger capacity models. Always calculate your household’s hot water needs to select a system that won’t fall short during busy times.
Conclusion
For general households seeking a reliable, easy-to-use smart water heater, the Electrolux 18kW Electric Tankless Water Heater offers a balanced mix of performance and smart features. Budget-conscious buyers will find the EcoSmart ECO 11 a solid choice that doesn’t compromise basic functionality. Those wanting the best in convenience and advanced controls should consider premium models like the WINTEMP 27kW WiFi Tankless Heater. For larger families or homes with high demand, gas options like the Westinghouse Smart Gas Model deliver higher flow rates with smart integration. Your choice should align with your household size, technical comfort level, and budget, ensuring you get the most from your smart hot water system.
