In 2025, tankless water heaters with smart apps are reshaping home convenience and efficiency. With advanced features like remote temperature control and real-time monitoring, you can easily manage your hot water needs. From propane to electric options, there’s a model tailored for every household. But which ones stand out in this competitive market? Let’s explore the top contenders that promise to enhance your daily routine.
APUS Tankless Water Heater Propane (140,000 BTU)
If you’re looking for a reliable and efficient hot water solution for your home, the APUS Tankless Water Heater is an excellent choice. Operating on propane, it delivers an impressive output of 140,000 BTU, providing up to 6.8 GPM. With Zero Cold Water Technology, you’ll enjoy instant hot water on demand. Plus, the built-in booster pump increases water flow by 130%, making it perfect for multiple outlets. The smart Wi-Fi app lets you control it remotely, ensuring convenience at your fingertips. Energy-efficient and compact, it’s designed for whole-house use while keeping your energy bills low.
Best For: Homeowners seeking an efficient and space-saving tankless water heater that provides instant hot water and energy savings.
Pros:
- Instant hot water delivery with Zero Cold Water Technology.
- High output of 140,000 BTU and up to 6.8 GPM, suitable for multiple outlets.
- Smart Wi-Fi app control for remote operation and convenience.
Cons:
- Requires propane, which may not be available in all areas.
- Initial installation costs may be higher compared to traditional water heaters.
- Compact design may limit placement options depending on plumbing configuration.
APUS Natural Gas Tankless Water Heater (140,000 BTU)
The APUS Natural Gas Tankless Water Heater is perfect for busy households that demand instant hot water without any wait. With a powerful 140,000 BTU output, it delivers up to 6.8 GPM, utilizing Zero Cold Water Technology for immediate access. You’ll enjoy hot water in just one second, even while using multiple fixtures simultaneously. Its smart features, like the WiFi app control and ECO smart cycle, guarantee energy efficiency and precise temperature management. Plus, its compact design fits easily in your space. With 24/7 customer support and a solid warranty, you can trust this heater for reliable performance.
Best For: Families and busy households that require instant hot water for multiple fixtures simultaneously without any wait time.
Pros:
- Instant hot water delivery in just one second with Zero Cold Water Technology.
- Energy-efficient operation with a 24/7 ECO smart cycle, saving 40% more energy than conventional heaters.
- Compact and wall-mounted design allows for easy installation and space-saving solutions.
Cons:
- Requires natural gas installation, which may not be suitable for all homes.
- Initial cost may be higher compared to traditional tank water heaters.
- Dependence on WiFi for remote control features might be a drawback for those without reliable internet access.
Westinghouse 14kW Smart WiFi Tankless Water Heater
For homeowners seeking an efficient and modern solution for hot water needs, the Westinghouse 14kW Smart WiFi Tankless Water Heater stands out with its smart Wi-Fi control feature. This electric heater offers a compact design, fitting seamlessly into your space while delivering a maximum flow rate of 3.38 GPM. With adjustable temperatures from 86°F to 140°F, you can customize your comfort. The smart app allows remote monitoring and control, compatible with Alexa and Google Home. ETL certified for safety, it also includes real-time LED status updates. Enjoy instant hot water for simultaneous use, making it perfect for busy households.
Best For: Homeowners looking for an efficient and space-saving solution for continuous hot water needs.
Pros:
- Smart Wi-Fi Control: Allows remote monitoring and control via app or voice commands, enhancing convenience.
- Instant Hot Water: Provides continuous hot water for simultaneous use, ideal for busy households.
- Compact Design: Space-saving installation that fits flush to walls, freeing up valuable floor space.
Cons:
- Requires Electrical Upgrades: Needs a dedicated 60 AMP breaker and 6 AWG wire, which may require professional installation.
- Limited Temperature Range: Adjustable only between 86°F to 140°F, which may not meet every user’s preference.
- Higher Initial Cost: Tankless models like this can have a higher upfront cost compared to traditional water heaters.
Rinnai RX199iN Condensing Smart Sense Tankless Water Heater
Rinnai RX199iN Condensing Smart Sense Tankless Water Heater stands out as an excellent choice for homeowners seeking efficient hot water solutions. With a remarkable output of up to 11.1 GPM, you can run up to seven fixtures simultaneously. Its energy efficiency is impressive, boasting a UEF of .98, ensuring lower utility bills. For easy maintenance, the Quick Flush feature simplifies upkeep. While professional installation is recommended, you can find a qualified technician through Rinnai’s website. Plus, the Smart Sense gas control system, with optional WiFi control, puts convenience right at your fingertips. Enjoy endless hot water with this innovative heater!
Best For: Homeowners looking for an efficient and reliable tankless water heater that can support multiple fixtures simultaneously.
Pros:
- High output: Provides up to 11.1 GPM, allowing for the use of up to seven fixtures at once.
- Energy-efficient: Features a UEF of .98, which can lead to significant savings on utility bills.
- Easy maintenance: The Quick Flush feature simplifies upkeep, ensuring long-term performance.
Cons:
- Professional installation required: Installation without a qualified technician is not advisable, which may incur additional costs.
- WiFi control module not included: The optional WiFi control requires a separate purchase for full smart functionality.
- Indoor/outdoor installation restrictions: While versatile, the installation location may be limited by local building codes and regulations.
Optimal+ Opti27Plus Smart Electric Tankless Water Heater
Looking for a reliable solution to endless hot water for your household? The Optimal+ Opti27Plus Smart Electric Tankless Water Heater delivers with its impressive 4.5 GPM capacity, providing hot water for three showers, two sinks, and an appliance simultaneously. It features Wi-Fi connectivity, allowing for easy monitoring and adjustments via your smartphone. With a maximum temperature of 140°F and smart diagnostics, you can enjoy peace of mind. Plus, its lifetime warranty and high-quality safety features, like anti-freezing protection, make it a sound investment. Weighing just 14 pounds, it’s wall-mounted and designed to fit seamlessly in your home.
Best For: Families or households needing continuous hot water for multiple showers and appliances simultaneously while enjoying smart features and safety protections.
Pros:
- Wi-Fi enabled: Easily monitor and adjust settings via your smartphone for added convenience.
- Lifetime warranty: Offers peace of mind with one of the best warranties in the category.
- Energy-efficient design: Self-modulating technology helps save on energy costs while providing hot water on demand.
Cons:
- Requires significant electrical setup: Needs 3 x DP 40 AMP breakers and specific wiring, which may necessitate professional installation.
- Limited availability: As a newer product, it may not be readily available in all markets.
- Weight and size: While compact, it may still require adequate wall space for installation.
APUS Tankless Water Heater Propane, 140,000 BTU Indoor Installation
The APUS Tankless Water Heater is an excellent choice for homeowners seeking an efficient and compact solution for their hot water needs. With a powerful 140,000 BTU output, it delivers up to 6.8 gallons per minute, ensuring you won’t run out of hot water. Its wall-mounted design (7.09W x 21.26H inches) saves space, while the smart Wi-Fi app allows you to control settings easily. Safety features like anti-freezing and overheat protection add peace of mind. Plus, with a 30-day return policy and a solid rating of 4.4 stars, it’s a reliable option for your indoor installation.
Best For: Homeowners looking for an efficient, space-saving solution for on-demand hot water.
Pros:
- High Efficiency: With a powerful 140,000 BTU output, it provides up to 6.8 GPM of hot water.
- Compact Design: The wall-mounted unit saves space in your home.
- Smart Control: Features a Wi-Fi app for easy temperature and settings management.
Cons:
- Indoor Installation Only: Not suitable for outdoor use, limiting installation options.
- Weight: At 34.2 pounds, it may require additional support for installation.
- Moderate Customer Rating: While rated 4.4 stars, it has a relatively low number of reviews (16), which may affect reliability perception.
Westinghouse 11kW Tankless Water Heater (Electric, Up to 2.56 GPM)
For those seeking a reliable and space-saving solution for continuous hot water, the Westinghouse 11kW Tankless Water Heater is an excellent choice. It delivers hot water on demand with a maximum flow rate of 2.56 GPM, perfect for one shower and two sinks. You’ll appreciate its smart features, including remote temperature control via an app and compatibility with Alexa and Google Home. Safety is prioritized with four-layer protection, while its compact design fits easily into any space. Plus, the 12-month warranty adds peace of mind, making this model a top contender for your home or office needs.
Best For: Those who need a compact and efficient tankless water heater for apartments, homes, or offices with moderate hot water demands.
Pros:
- Smart features allow for remote temperature control and voice activation through Alexa and Google Home.
- Compact, wall-mounted design saves valuable floor space.
- High safety standards with four-layer protection and a 12-month warranty for added peace of mind.
Cons:
- Maximum flow rate may not be sufficient for larger households or simultaneous high-demand usage.
- Installation requires specific electrical requirements, which may necessitate professional help.
- Limited to a maximum temperature of 140°F, which may not meet all users’ preferences.
EcoSmart ECO 11 Electric Tankless Water Heater
Offering an efficient solution for small spaces, the EcoSmart ECO 11 Electric Tankless Water Heater is perfect for those who need on-demand hot water without the bulk of traditional tank heaters. Weighing just 6.5 pounds and measuring 11.5 x 8 x 3.75 inches, it’s easy to install in various locations. With its 13KW power, it delivers endless hot water at a maximum flow rate of 3.1 gallons per minute. Plus, the patented self-modulating technology guarantees 99% thermal energy efficiency, keeping your water at a consistent temperature. Enjoy a lifetime warranty on electronics, making this heater a reliable choice for your home.
Best For: Individuals or families in small homes or apartments needing efficient, on-demand hot water without the space requirements of traditional tank heaters.
Pros:
- Endless hot water supply ensures that you never run out, making it perfect for busy households.
- Compact design saves space and allows for flexible installation in various locations.
- High efficiency with 99% thermal energy efficiency, reducing energy costs over time.
Cons:
- Limited flow rate may not be sufficient for simultaneous use in larger households or during peak demand.
- Requires specific electrical setup, which may necessitate professional installation for some users.
- Performance may vary in colder climates, particularly with lower incoming water temperatures.
MIZUDO Tankless Water Heater Propane, WiFi & APP Control
If you’re looking for a reliable and efficient water heating solution, the MIZUDO Tankless Water Heater with WiFi and app control stands out. With a maximum flow rate of 5.1 GPM and a powerful 120,000 BTU heating capacity, it’s perfect for large families. You can install it indoors or outdoors, offering flexibility for any home setup. The smart features let you adjust temperature settings, monitor energy usage, and receive maintenance alerts right from your phone. Plus, its CSA certification guarantees safety, while advanced protection mechanisms keep your family safe. Enjoy peace of mind with a 2-year warranty on the unit and 5 years on the heat exchanger.
Best For: Families looking for an efficient and flexible water heating solution that can handle high demand and be controlled remotely.
Pros:
- Flexible installation options allow for both indoor and outdoor setups, catering to various home configurations.
- Smart WiFi and app control enable users to easily manage temperature settings and monitor energy usage from their smartphones.
- High heating capacity of 120,000 BTU and a maximum flow rate of 5.1 GPM, making it ideal for large families and simultaneous use.
Cons:
- Requires additional accessory kits for outdoor installation, which may increase overall costs.
- Initial setup may be complex for some users, particularly with venting requirements.
- Limited warranty period on the unit (2 years) compared to some competitors.
WINTEMP Electric Tankless Water Heater (27kW, 240V)
The WINTEMP Electric Tankless Water Heater (27kW, 240V) is ideal for homeowners seeking an efficient and space-saving solution for their hot water needs. It delivers a maximum output of 6.5 GPM, ensuring you won’t run out of hot water. This compact unit, measuring just 11.1” x 19.1” x 4”, is wall-mounted and occupies 90% less space than traditional tank heaters. With energy savings up to 99%, it adjusts power based on real-time usage, enhancing efficiency. Plus, it’s equipped with safety features like overheat protection and comes with a 2-year warranty for peace of mind. Enjoy endless hot water conveniently!
Best For: Homeowners looking for an efficient, space-saving solution for continuous hot water without the limitations of traditional tank heaters.
Pros:
- Energy efficient: Achieves up to 99% energy savings and can reduce electricity costs by up to 60% compared to traditional tank heaters.
- Compact design: Wall-mounted and occupies 90% less space than traditional models, making it suitable for tight areas.
- Endless hot water: Provides a maximum output of 6.5 GPM, ensuring you won’t run out of hot water during use.
Cons:
- Installation requirements: Requires specific electrical setup with 3 x 40 Amp breakers and appropriate wiring, which may increase installation costs.
- Higher upfront cost: Initial purchase price may be higher than traditional tank water heaters.
- Limited to electrical supply: Dependent on the home’s electrical system, which may not be suitable for all households.
Factors to Consider When Choosing Tankless Water Heaters With Smart App
When you’re choosing a tankless water heater with a smart app, there are several key factors to keep in mind. You’ll want to take into account energy efficiency ratings, installation requirements, and flow rate capacity to guarantee it meets your needs. Additionally, look into temperature control options and safety features to enhance your overall experience.
Energy Efficiency Ratings
Choosing a tankless water heater with smart app controls means paying close attention to energy efficiency ratings to maximize your savings. Look for models that display their Energy Factor (EF) or Uniform Energy Factor (UEF). A higher UEF indicates better efficiency, with some units reaching 99% thermal energy efficiency. These heaters often incorporate advanced self-modulating technology, adjusting energy use based on real-time water flow and temperature, which boosts savings. Additionally, many models feature an ECO mode that can save about 40% more energy compared to traditional water heaters since they operate only when hot water is needed. Remember, regular maintenance features, like quick flush capabilities, also help maintain peak performance and reduce energy waste over time.
Installation Requirements
Maximizing energy efficiency with smart app-controlled tankless water heaters also means understanding the installation requirements. Most models need standard plumbing connections, typically using 1/2 or 3/4 NPT fittings. If you opt for an electric unit, be prepared for dedicated circuit breakers, often requiring 40 AMP or higher, along with specific gauge wiring. For gas-powered heaters, proper venting systems are essential, usually necessitating 3-inch diameter vent pipes for safe indoor exhaust. Wall-mounted designs are common, saving floor space, but dimensions can vary considerably. It’s often best to hire professionals for gas installations to meet local codes and safety standards, while electric units may also need an electrician for safe electrical connections.
Flow Rate Capacity
The flow rate capacity of a tankless water heater is vital for guaranteeing you meet your household’s hot water demands. Measured in gallons per minute (GPM), a higher flow rate, like 6.8 GPM, can support multiple outlets simultaneously, making it ideal for larger homes with several showers and sinks in use. If your needs are smaller, a flow rate of 2.56 GPM might be enough for one shower and two sinks. Additionally, consider the incoming water temperature, as colder water can reduce the effective flow rate and hot water output. It’s important to match your tankless water heater’s flow rate to your household’s peak usage times to make sure you never run out of hot water when you need it most.
Temperature Control Options
When considering temperature control options for tankless water heaters equipped with smart apps, you’ll find that flexibility and convenience are key. Many models allow you to adjust water temperatures in increments, typically ranging from 86°F to 140°F, to suit your preferences. Some even feature Smart Season Comfort Mode, which automatically adjusts the outlet temperature based on incoming water, maintaining precision within ±1°F. Advanced smart controls let you manage settings remotely via your mobile app, so you can make changes from anywhere. You’ll also appreciate real-time status monitoring and instant feedback on current temperature and system performance. Models with smart diagnostics can alert you to any temperature fluctuations, ensuring consistent performance and quick identification of potential issues.
Safety Features Included
Choosing a tankless water heater with smart app capabilities means considering a variety of safety features that can protect both your home and your investment. Look for units with freeze protection to guard against cold damage and overheat protection to prevent dangerous temperature spikes. Advanced models often include dry combustion protection, ensuring the heater won’t operate without water, which can safeguard your home. Flame failure detection is another critical feature, cutting off the gas supply if a flame goes out unexpectedly, reducing gas leak risks. Real-time monitoring via the smart app alerts you to potential issues, enhancing safety. Finally, check for safety certifications like ETL or CSA, which confirm the unit meets strict safety standards.
Maintenance and Support
Selecting a tankless water heater with smart app capabilities not only enhances convenience but also simplifies maintenance and support. Many models offer 24/7 customer support, so you can get assistance whenever you need it. The smart app features send you reminders for routine checks and maintenance tasks, making upkeep a breeze. Some units even include a Quick Flush feature, allowing for easy maintenance that helps extend the lifespan and efficiency of your heater. With smart diagnostics, you can quickly identify issues and troubleshoot using error codes provided by the app. Plus, warranty information and return policies are easily accessible through the mobile application, ensuring you have all the support you need right at your fingertips.
Smart Technology Integration
Smart technology integration in tankless water heaters can dramatically enhance your experience, offering seamless control and monitoring right from your smartphone. With Wi-Fi connectivity, you can easily adjust temperature settings, track energy usage, and receive maintenance alerts. This flexibility lets you manage your hot water needs efficiently. Advanced smart controls automatically regulate water temperature and flow rates based on your usage patterns, ensuring consistent performance while saving energy. Many models even work with voice assistants like Alexa and Google Home for hands-free operation. Plus, regular software updates and diagnostics through the app help you maintain your unit and catch potential issues early, boosting reliability and longevity. Embracing smart technology makes managing your water heater easier than ever.
Warranty and Coverage
When considering a tankless water heater with smart app capabilities, it’s essential to pay attention to the warranty and coverage options available. Warranty coverage can vary considerably; some heaters offer a lifetime guarantee on key components like electronics and heat exchangers, while others provide limited coverage. Most manufacturers have standard warranties ranging from 1 to 12 months for parts and labor, with options for extended coverage if you register or purchase additional plans. Be sure to review what’s covered, including labor costs and any exclusions for specific damages. Also, consider the customer support and warranty claim processes, as responsive service can greatly enhance your ownership experience. A solid warranty can provide peace of mind as you enjoy your tankless water heater.
