If you’re searching for a tankless water heater with wifi control, you’re looking for a model that combines instant hot water with smart connectivity. The best picks offer seamless remote management, energy efficiency, and user-friendly features. The main tradeoffs often involve balancing power and price, as more advanced wifi-enabled units tend to cost more or have limited flow rates. For those who prioritize convenience without sacrificing reliability, understanding these differences is key. Continue reading for a detailed breakdown of the top options and what makes each stand out.
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Key Takeaways
- The highest-powered models tend to offer better flow rates but come at a higher cost and energy consumption.
- WiFi control reliability varies; some units integrate seamlessly with smart home systems, others require additional modules.
- Most top-rated models balance performance with ease of installation, but a few premium options prioritize advanced features over simplicity.
- Budget-friendly options often lack advanced app features or have limited flow capacity, making them ideal for smaller households.
- Compatibility with existing home wiring and plumbing is a critical factor that influences overall installation costs and complexity.
| 18kW Tankless Water Heater Electric 240V WiFi, ETL Certified |  | Best Compact Electric Tankless for Small Spaces | Power: 18kW | Voltage: 240V | Flow Rate: up to 4.3 GPM | VIEW ON AMAZON | See Our Full Breakdown |
| 36kW Tankless Water Heater Electric 240V WiFi, ETL Certified |  | Best High-Capacity Electric for Multi-Point Use | Power: 36,000 watts | Voltage: 240V | Flow Rate: 8.7 GPM | VIEW ON AMAZON | See Our Full Breakdown |
| 18kW Electric Tankless Water Heater 240V WiFi Certified |  | Best for Small to Medium Homes on a Budget | Power: 18000 watts | Voltage: 240V | Flow Rate: 4.3 gpm | VIEW ON AMAZON | See Our Full Breakdown |
| Tankless Electric Water Heater, 240V, 14kW, Max 3.3 GPM, Instant Heating |  | Best for Compact Spaces with Precise Control | Power: 14 KW | Voltage: 240V | Flow Rate: 3.3 GPM | VIEW ON AMAZON | See Our Full Breakdown |
| Rinnai RWM200 WiFi Control Module for Tankless Water Heater |  | Best Remote Control Accessory for Rinnai Units | Connectivity: Wi-Fi | Compatibility: Rinnai tankless water heaters | Wireless Range: up to 300 feet | VIEW ON AMAZON | See Our Full Breakdown |
| Westinghouse 11kW Tankless Electric Water Heater, 240V, WiFi, ETL Certified, Gray |  | Best for Compact Spaces and Basic Remote Control | Power: 11 kW | Voltage: 240V | Flow Rate: 2.56 GPM | VIEW ON AMAZON | See Our Full Breakdown |
| Westinghouse Wifi Tankless Water Heater Electric 24kW 240V |  | Best for High Flow and Versatile Home Use | Maximum Flow Rate: 5.55 GPM | Starting Flow Rate: 0.79 GPM | Voltage: 240V | VIEW ON AMAZON | See Our Full Breakdown |
| WINTEMP 36kW Electric Tankless Water Heater 240V ETL Certified WiFi |  | Best for Large Homes and Continuous Hot Water | Power Source: AC | Wattage: 36 KW | Voltage: 240 volts | VIEW ON AMAZON | See Our Full Breakdown |
| 27kW Tankless Electric Water Heater with WiFi, ETL Certified |  | Best for Moderate Household Use with App Monitoring | Power Source: Electric/AC | Wattage: 27,000 watts | Voltage: 240 volts | VIEW ON AMAZON | See Our Full Breakdown |
| 12kW Electric Tankless Water Heater with WiFi, ETL Certified |  | Best for Small Points of Use and Compact Spaces | Power Source: Electric/AC | Wattage: 12kW | Voltage: 240V | VIEW ON AMAZON | See Our Full Breakdown |
| tankless water heater with wifi control | Voltage | Flow Rate | Power | Maximum Temperature |
|---|---|---|---|---|
| 18kW Tankless Water Heater Ele | 240V | up to 4.3 GPM | 18kW | — |
| 36kW Tankless Water Heater Ele | 240V | 8.7 GPM | 36,000 watts | 140°F |
| 18kW Electric Tankless Water H | 240V | 4.3 gpm | 18000 watts | 140°F |
| Tankless Electric Water Heater | 240V | 3.3 GPM | 14 KW | 140°F |
| Rinnai RWM200 WiFi Control Mod | 12 volts | — | — | — |
| Westinghouse 11kW Tankless Ele | 240V | 2.56 GPM | 11 kW | 140°F |
| Westinghouse Wifi Tankless Wat | 240V | — | 24kW | — |
| WINTEMP 36kW Electric Tankless | 240 volts | 8.7 GPM | — | — |
| 27kW Tankless Electric Water H | 240 volts | 6.5 GPM | — | 140°F |
| 12kW Electric Tankless Water H | 240V | 2.8 GPM | — | 140°F |
More Details on Our Top Picks
18kW Tankless Water Heater Electric 240V WiFi, ETL Certified
This 18kW electric model stands out for its space-saving design and smart self-modulating technology, making it a strong choice for residences with limited installation area. Compared with larger units like the 36kW model, it consumes less power and is easier to incorporate into existing electrical systems, though it offers a lower flow rate suitable for 2-3 points of use. Its WiFi control allows remote monitoring and adjustments, enhancing convenience. The main tradeoff is that it necessitates professional installation due to specific electrical requirements, and its capacity might be inadequate for larger households or high-demand scenarios.
Pros:- Compact and space-efficient design
- Energy-efficient with smart self-modulating technology
- Remote WiFi control for real-time monitoring
Cons:- Requires professional installation and specific electrical setup
- Limited flow rate suitable for 2-3 outlets
Best for: Small households or apartments needing reliable hot water at a single or limited points of use
Not ideal for: Large families or homes with multiple bathrooms where higher flow rates are essential
- Power:18kW
- Voltage:240V
- Flow Rate:up to 4.3 GPM
- Dimensions:15.9″ H x 13″ W x 4.2″ D
- Temperature Range:86°F to 140°F
- Safety Certifications:ETL
Our verdict“This model is ideal for small residential spaces prioritizing energy efficiency and remote control capabilities.”
36kW Tankless Water Heater Electric 240V WiFi, ETL Certified
This 36kW electric tankless heater offers ample hot water for larger households, with a flow rate of 8.7 GPM and advanced WiFi controls that enable remote management. It provides continuous hot water, making it suitable for homes with multiple bathrooms or high simultaneous demand, unlike the smaller 18kW models. Its self-modulating technology boosts energy efficiency, but the high power consumption means it may require a dedicated electrical circuit and professional installation. Compared to the 18kW unit, this option is more complex to install but delivers significantly higher flow capacity, making it a better fit for bigger households.
Pros:- High flow rate suitable for multiple outlets
- WiFi control for remote adjustments and monitoring
- Energy-efficient with self-modulating technology
- Space-saving wall-mounted design
Cons:- Requires professional electrical and water connections
- High power consumption may need dedicated circuits
Best for: Larger households or homes with multiple bathrooms needing high flow capacity and remote control
Not ideal for: Small apartments or homes with limited electrical capacity due to high power demands
- Power:36,000 watts
- Voltage:240V
- Flow Rate:8.7 GPM
- Maximum Temperature:140°F
- Maximum Pressure:150 psi
- Dimensions:13.7″ W x 19.4″ H
Our verdict“This unit makes the most sense for large households seeking reliable, remotely controllable hot water without space constraints.”
18kW Electric Tankless Water Heater 240V WiFi Certified
This 18kW unit echoes the first product but emphasizes a slightly more straightforward installation process with proven safety and efficiency features. Its WiFi control provides remote management for homes that need modest hot water capacity, similar to the 18kW ETL model but with a focus on energy savings up to 99%. Its compact size makes it easy to fit into small spaces, yet the maximum flow rate of 4.3 GPM limits its suitability for larger households or multiple simultaneous outlets. Compared to the 36kW alternative, it’s less powerful but more affordable and simpler to install.
Pros:- Provides continuous hot water without preheating
- High energy efficiency (up to 99%)
- Compact, space-saving design
- Remote WiFi control for convenience
Cons:- Requires professional electrical setup
- Limited flow rate may be insufficient for big households
Best for: Small households or apartments that need reliable hot water with remote control and high efficiency
Not ideal for: Large families or homes with multiple bathrooms requiring high flow capacity
- Power:18000 watts
- Voltage:240V
- Flow Rate:4.3 gpm
- Maximum Temperature:140°F
- Efficiency:High (up to 99%)
- Maximum Pressure:130 psi
Our verdict“This model suits small households prioritizing energy savings and remote management over high flow capacity.”
Tankless Electric Water Heater, 240V, 14kW, Max 3.3 GPM, Instant Heating
This 14kW heater caters to single or small outlet needs, offering precise temperature control with an LED display and knob, making it suitable for tight spaces like under sinks or in small apartments. Its flow rate of 3.3 GPM is lower than higher-capacity models, limiting its use to one or two outlets simultaneously. While it provides instant hot water and is ETL certified for safety, the electrical requirements mean professional installation is necessary—similar to the other smaller units but with a focus on exact temperature management. This makes it ideal for users needing precise control in limited spaces but not for larger households.
Pros:- Provides instant, continuous hot water
- Precise temperature control with LED display
- Compact and easy to install in tight spaces
- ETL certified for safety
Cons:- Flow rate limited to 3.3 GPM
- Requires professional electrical installation
Best for: Single-user setups or small apartments needing precise, on-demand hot water
Not ideal for: Homes with multiple simultaneous hot water demands or larger households
- Power:14 KW
- Voltage:240V
- Flow Rate:3.3 GPM
- Maximum Temperature:140°F
- Wattage:14,000 watts
- Maximum Pressure:130 psi
Our verdict“This model is perfect for users who need precise temperature control in small spaces with limited hot water demand.”
Rinnai RWM200 WiFi Control Module for Tankless Water Heater
The Rinnai RWM200 module is designed to add WiFi control to compatible Rinnai tankless water heaters. It offers flexible placement up to 300 feet from the unit, allowing users to monitor energy consumption, set schedules, and receive alerts remotely. While it enhances control convenience, it depends on the existing Rinnai heater’s capabilities and WiFi signal strength for optimal operation. Compared to standalone WiFi-enabled heaters, it extends remote functionality to existing systems, but it doesn’t provide heating capacity itself. This makes it ideal for owners who want to upgrade their current Rinnai setup with remote management features without replacing the entire unit.
Pros:- Enables remote control and monitoring via smartphone
- Easy two-wire installation process
- Flexible placement up to 300 feet from the heater
- Provides energy usage tracking and alerts
Cons:- Limited to Rinnai units, not universal
- Dependent on WiFi signal strength for reliability
Best for: Homeowners with Rinnai tankless water heaters seeking remote control and monitoring
Not ideal for: Users with non-Rinnai models or those needing a full WiFi-enabled water heater
- Connectivity:Wi-Fi
- Compatibility:Rinnai tankless water heaters
- Wireless Range:up to 300 feet
- Voltage:12 volts
Our verdict“This module offers a simple upgrade for Rinnai owners wanting remote control without replacing their existing heater.”
Westinghouse 11kW Tankless Electric Water Heater, 240V, WiFi, ETL Certified, Gray
This Westinghouse 11kW model excels in providing instant hot water within 3 seconds, making it ideal for small households or point-of-use applications. Its compact design and WiFi compatibility with Alexa and Google Home offer convenient remote control, but its flow rate of 2.56 GPM limits simultaneous use—less suited for busy households. Compared to larger units like the WINTEMP 36kW, it’s less capable of supporting multiple outlets at once, though it’s easier to install and maintain. The safety protections and ETL certification add peace of mind for residential users choosing a straightforward, space-saving solution. However, requiring a dedicated 60A circuit and specific wiring may complicate installation for some. If space and simplicity are priorities, this pick fits well, but it’s not ideal for high-demand settings.Pros:- Instant hot water delivery in just 3 seconds
- WiFi compatibility with voice control options
- Compact, space-saving wall-mount design
- ETL certified with multiple safety protections
Cons:- Requires dedicated 60A circuit and specific wiring
- Flow rate may be insufficient for multiple outlets simultaneously
Best for: Single bathroom or small apartment dwellers needing quick hot water and remote control capabilities.
Not ideal for: Large families or homes with multiple bathrooms, as flow rate and capacity are limited.
- Power:11 kW
- Voltage:240V
- Flow Rate:2.56 GPM
- Maximum Temperature:140°F
- Maximum Pressure:120 psi
- Certifications:ETL Certified
Our verdict“This model suits small-scale residential use where space and remote control are priorities, but it isn’t designed for high-demand environments.”
Westinghouse Wifi Tankless Water Heater Electric 24kW 240V
Compared with the 11kW model, this 24kW heater offers a significantly higher flow rate of up to 5.55 GPM, making it better suited for larger households or multiple fixtures. Its smart Wi-Fi control permits remote temperature adjustments via Alexa and Google Home, yet it demands a dedicated 100A breaker and more complex electrical wiring—factors that may require professional installation. The unit’s compact form fits well in residential settings, but its higher power draw limits compatibility with older electrical systems. For families needing volume and remote control, it’s an obvious choice, though not ideal for homes with limited electrical capacity. This heater balances capacity with convenience but involves more extensive electrical work.Pros:- High flow rate of 5.55 GPM for multiple outlets
- WiFi control compatible with popular smart home systems
- Compact, space-efficient design
- Suitable for residential use with multiple fixtures
Cons:- Requires a 100A electrical breaker and specialized wiring
- Installation likely needs professional setup
Best for: Families or small groups wanting high flow rates and smart control in their homes with adequate electrical infrastructure.
Not ideal for: Older homes or apartments with limited electrical capacity, due to the high amperage requirement.
- Maximum Flow Rate:5.55 GPM
- Starting Flow Rate:0.79 GPM
- Voltage:240V
- Power:24kW
- Dimensions:17″ H × 13″ W × 4.3″ D
- Certifications:ETL
Our verdict“This heater provides a great balance of high capacity and remote control, best suited for homes with sufficient electrical service.”
WINTEMP 36kW Electric Tankless Water Heater 240V ETL Certified WiFi
The WINTEMP 36kW unit stands out for its ability to deliver up to 8.7 GPM, making it an excellent choice for large homes with multiple bathrooms. Its advanced self-modulating technology ensures energy efficiency despite the high power draw, and WiFi control adds remote temperature management. Unlike the 24kW Westinghouse, it’s better suited for demanding households, but it requires a 300A electrical service—far beyond typical residential setups—making installation more complex and expensive. Safety features and ETL certification add reliability, yet the power needs make it unsuitable for older or smaller homes. This model makes a compelling case for big households, but most will need significant electrical upgrades.Pros:- Massive flow rate of 8.7 GPM supports large households
- Advanced self-modulating technology for efficiency
- WiFi control for remote adjustments
- ETL certified with safety features
Cons:- Requires a 300A electrical service, limiting installation options
- Higher power consumption increases operational costs
Best for: Large family homes with multiple bathrooms and high hot water demand, equipped with a robust electrical system.
Not ideal for: Homes with limited electrical capacity or smaller households that won’t use the full flow rate.
- Power Source:AC
- Wattage:36 KW
- Voltage:240 volts
- Flow Rate:8.7 GPM
- Maximum Pressure:150 psi
- Certifications:ETL
Our verdict“This model excels in large homes needing continuous hot water, provided the electrical infrastructure can support it.”
27kW Tankless Electric Water Heater with WiFi, ETL Certified
The 27kW model strikes a middle ground, providing a flow rate of 6.5 GPM suitable for homes with 2-4 points of use. Its WiFi remote control and app monitoring, compatible with Tuya Smart, make it convenient for users wanting to adjust temperatures on the go. Compared to the smaller 12kW unit, it offers much higher capacity but also consumes significantly more power, requiring a dedicated electrical setup. The self-modulating technology helps optimize energy use, yet its high power demand may still pose challenges in older homes. This pick is ideal for those needing more hot water capacity without massive electrical upgrades, but is less suitable for very large households or homes with limited electrical infrastructure.Pros:- Remote WiFi control and app monitoring
- Space-efficient wall-mounted design
- Self-modulating technology for energy savings
- ETL safety certification
Cons:- Requires specific electrical setup and professional installation
- High power consumption may increase energy bills
Best for: Mid-sized homes or apartments with multiple fixtures that want remote control without extensive electrical upgrades.
Not ideal for: Older or smaller homes with limited electrical capacity, due to high power requirements.
- Power Source:Electric/AC
- Wattage:27,000 watts
- Voltage:240 volts
- Flow Rate:6.5 GPM
- Maximum Temperature:140°F
- Special Features:LED display, Self-Modulating, WiFi
Our verdict“This model offers a solid balance of capacity and remote control features for moderate household needs, assuming electrical capacity is sufficient.”
12kW Electric Tankless Water Heater with WiFi, ETL Certified
The 12kW unit is designed for small-scale hot water needs, offering a flow rate of just 2.8 GPM—suitable for tiny apartments or single fixtures. It provides reliable, on-demand hot water with WiFi control for remote temperature adjustments and app monitoring, making it a practical choice for small homes or offices. Its energy-efficient self-modulating system minimizes power use, but the limited flow rate restricts its use to low-demand scenarios. Compared to larger models like the 36kW, it’s less capable of supporting multiple outlets simultaneously. The installation requires specific wiring and a compatible breaker, which might be challenging for some users. This heater fits well in limited spaces, but it’s not suitable for larger households or high-demand applications.Pros:- Remote WiFi control for temperature adjustments
- Space-saving, wall-mounted design
- Energy-efficient self-modulating technology
- ETL certified with safety protections
Cons:- Limited to 2.8 GPM flow rate, unsuitable for large households
- Requires specific electrical wiring and breaker setup
Best for: Small homes, offices, or single-point applications needing reliable hot water with remote control capabilities.
Not ideal for: Larger households or homes with multiple bathrooms, due to its limited flow rate and capacity.
- Power Source:Electric/AC
- Wattage:12kW
- Voltage:240V
- Flow Rate:2.8 GPM
- Maximum Temperature:140°F
- Certifications:ETL
Our verdict“This compact heater is ideal for small-scale applications where remote control and space efficiency are priorities, but it can’t handle high demand.”
How We Picked
Our evaluation focused on key factors such as performance, ease of use, build quality, and smart features. We prioritized units with proven wifi connectivity, reliable app control, and efficient operation. Consideration was given to flow rate capabilities, energy consumption, and safety certifications like ETL or UL. We also examined user reviews to assess real-world reliability and maintenance. Products were ranked based on how well they balance these qualities while offering good value for different household sizes and budgets.Factors to Consider When Choosing Tankless Water Heater With Wifi Control
Choosing the right tankless water heater with wifi control involves considering several important factors beyond just connectivity features. It’s vital to match the unit’s power and flow rate to your household’s hot water needs, avoiding overspending on capacity you don’t require. Compatibility with your existing electrical system and plumbing can also affect installation costs. Additionally, the quality of the wifi connection and app usability directly impact your experience, so don’t overlook the importance of reliable smart features. We’ll explore these considerations in detail to help you make an informed decision.Power and Flow Rate
Understanding your household’s hot water demand is essential. Larger families or homes with multiple bathrooms typically need higher kW units with better flow rates, often above 27kW, to ensure consistent hot water. Smaller households might get by with lower-powered models, which are more affordable and easier to install. Oversizing can lead to unnecessary energy use, while undersizing results in lukewarm water during peak times. Aim to match the unit’s capacity with your actual usage to optimize both performance and cost efficiency.
WiFi Connectivity and App Functionality
Not all wifi-enabled units are equal; some integrate seamlessly with smart home ecosystems like Alexa or Google Assistant, while others rely on proprietary apps that can be less intuitive. Reliability of the wifi connection and real-time control are crucial for remote troubleshooting, scheduling, or monitoring energy use. Consider the app’s interface, update frequency, and user reviews to gauge reliability. A well-implemented smart system can significantly enhance convenience, but poor connectivity can frustrate users and limit functionality.
Installation and Compatibility
Proper installation is vital for safe and efficient operation. Check your electrical system’s capacity—many high-powered models require 240V circuits with sufficient amperage. Plumbing connections should match the unit’s inlet and outlet sizes to avoid costly modifications. Some models are more DIY-friendly, while others necessitate professional installation. Compatibility with your existing setup can influence both initial costs and long-term reliability, so consider these factors carefully before purchasing.
Build Quality and Safety Certifications
Durability and safety are non-negotiable when choosing a water heater. Look for units with certifications such as ETL or UL, which indicate adherence to safety standards. High-quality materials and solid construction reduce the risk of leaks and electrical faults. Some models also include features like cold water protection or automatic shutoff, which enhance safety. Investing in a well-built unit minimizes maintenance and replacement costs over time.
Price and Value
While premium models offer advanced features and higher performance, they come with a higher price tag. Budget options may lack smart features or have limited capacity, making them suitable for small households or secondary locations. Consider your specific needs and how much you’re willing to invest in convenience and efficiency. Sometimes, spending a bit more on a reliable, feature-rich unit saves money and hassle in the long run, especially if you value smart home integration and remote control capabilities.
Frequently Asked Questions
Can I control my tankless water heater with wifi from anywhere?
Yes, most wifi-enabled tankless water heaters allow remote control through their dedicated apps, which you can access from anywhere with an internet connection. This feature lets you adjust temperature settings, monitor energy use, or troubleshoot issues in real-time. However, the reliability of this control depends on the stability of your home wifi network and the manufacturer’s app quality. Ensure your system supports remote access before making a purchase if this feature is a priority.
Are wifi-connected tankless water heaters more prone to failure?
Wifi connectivity adds an extra component that can potentially fail, especially if your network is unstable or the device’s firmware is outdated. However, high-quality units are designed with robust connectivity features and regular updates to minimize issues. It’s important to read user reviews and choose models with proven reliability. Proper installation and maintaining a strong wifi signal can also reduce the likelihood of connectivity problems.
Will my existing smart home system work with these water heaters?
Compatibility varies among models. Some units integrate directly with popular smart home platforms like Alexa, Google Home, or Apple HomeKit, while others require additional modules or don’t support third-party systems at all. Before purchasing, check the product specifications and compatibility lists. If seamless integration is important, opt for models explicitly designed for compatibility with your existing smart home ecosystem.
Is it worth paying extra for a high-capacity wifi water heater?
Higher-capacity models provide better flow rates, making them suitable for larger households or homes with multiple bathrooms. The added cost often reflects increased power, better durability, and more advanced smart features. If your household demands consistent hot water and remote management, investing in a high-capacity unit can improve comfort and convenience. However, for smaller homes or occasional use, a mid-range model may offer better value and efficiency.
How do I ensure my wifi control remains secure?
Security begins with choosing a reputable brand that regularly updates its firmware and has robust encryption protocols. Keep your home wifi network protected with strong passwords and enable network security features like WPA3. Regularly update the water heater’s firmware and your router’s software to patch vulnerabilities. Avoid using default passwords or leaving open networks to reduce the risk of unauthorized access.
Conclusion
For most households, the best overall choice is a mid-range model with reliable wifi connectivity and sufficient flow rate, offering a balance of performance and affordability. Budget-conscious buyers should consider simpler units with basic smart features, while those seeking premium smart home integration might prioritize high-capacity, fully compatible systems. Beginners or DIY enthusiasts benefit from models with straightforward installation and user-friendly apps. Ultimately, matching the unit’s specifications and smart features to your household size, budget, and tech setup will lead to the best long-term satisfaction.NFL season / tailgating Picks
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