Imagine stepping into a freezing shower because your old water heater just can’t keep up with your large family’s needs. That chilly, frustrating moment is all too familiar for many homeowners.
Running out of hot water during busy mornings or long showers can throw off your entire day. But it doesn’t have to be this way. Choosing the right tankless water heater changes everything. It means endless hot water exactly when you need it, saving space and energy while keeping everyone comfortable.
If you’ve been searching for the best solution to meet your home’s demands, you’re in the right place. In this article, we’ll explore top-rated tankless water heaters designed for large homes—helping you find the perfect fit to make daily life easier and warmer. Keep reading to discover which models stand out and why they’re worth considering.
Rheem Tankless Electric Water Heater
The Rheem 18kW 240V Tankless Electric Water Heater in Gray is ideal for homeowners or renters seeking an efficient and space-saving hot water solution. This product is perfect for those with moderate hot water demands who want to reduce energy consumption and enjoy on-demand hot water without the bulk of traditional water heaters. It is also suitable for small apartments, cabins, or secondary bathrooms where space is limited.
Pros:
- Compact and lightweight design with dimensions of 3.5 x 14.5 x 18.5 inches and weighing just 14.78 pounds
- Energy-efficient 18kW tankless electric heating for instant hot water
- Durable gray finish that fits well in modern homes
- Easy installation thanks to 240V power compatibility
- Brand reliability backed by Rheem, a leading manufacturer in water heating solutions
Cons:
- Requires a dedicated 240V electrical circuit, which may involve additional wiring costs
- Limited to smaller households or low-demand applications due to 18kW power rating
- No built-in storage, so water flow rate depends on electric capacity and inlet temperature
The Rheem 18kW 240V Tankless Electric Water Heater features a sleek and compact design, making it an excellent choice for areas where space is at a premium. Its tankless technology ensures that hot water is delivered instantly, eliminating the wait time associated with traditional tank water heaters. This not only provides convenience but also helps conserve energy by heating water only when needed.
With a robust power rating of 18kW, this unit effectively meets the hot water needs of small households or individual fixtures. The installation process is straightforward for homes equipped with a suitable 240V electrical supply. Moreover, the durable gray finish adds a modern aesthetic while protecting the unit from wear and tear, ensuring long-lasting performance. Overall, this tankless water heater offers an energy-efficient and space-saving solution for reliable hot water delivery.
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Rheem Rtex-24 Electric Tankless Water Heater
The Rheem RTEX-24 24kW 240V Electric Tankless Water Heater is ideal for homeowners and small businesses seeking an efficient, space-saving solution for hot water needs. It is perfect for those who want to reduce energy consumption while ensuring a continuous supply of hot water without the bulk of a traditional tank heater.
Pros:
- Compact and lightweight design for easy installation and space-saving
- Energy-efficient tankless technology reduces utility bills
- Provides endless hot water on demand
- Durable gray finish that resists corrosion
- Precise temperature control with easy-to-use digital display
Cons:
- Requires a 240V electrical supply, which may need electrical upgrades
- Limited flow rate may not support multiple simultaneous uses in large households
The Rheem RTEX-24 features a powerful 24kW heating element that delivers hot water efficiently whenever needed, eliminating the wait time associated with traditional tank heaters. Its compact dimensions (Height: 3.5 Inches, Width: 14.5 Inches, Length: 18.25 Inches) and lightweight design (17.8 pounds) make it an excellent choice for installations in tight spaces, such as under sinks or in utility closets.
Equipped with a user-friendly digital thermostat, this electric tankless water heater allows precise temperature adjustments, ensuring consistent comfort and preventing scalding. The tankless technology not only conserves energy by heating water only on demand but also extends the lifespan of the unit, offering reliable performance for years to come.
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Wintemp Tankless Electric Water Heater
The WINTEMP 36kW Tankless Electric Water Heater 240V is ideal for homeowners seeking a reliable and efficient solution for their hot water needs. This unit is perfect for those who want endless hot water on demand without the hassle of a traditional tank system. It suits families or individuals looking to upgrade their water heating system for whole house supply with modern features like WiFi control and an LED temperature display.
Pros:
- Provides instant on-demand hot water with a high flow rate of up to 8.7 GPM
- Energy efficient with tankless design that saves space and reduces energy consumption
- Convenient WiFi control allows remote temperature adjustments and monitoring
- ETL certified ensuring safety and quality standards
- LED temperature display offers precise temperature control
- Compact size with dimensions of 21.1 x 13.7 x 13.7 inches and lightweight design
Cons:
- Requires a 240V electrical connection, which may need professional installation
- Initial cost can be higher compared to traditional water heaters
- Flow rate may be limited if multiple high-demand outlets are used simultaneously
The WINTEMP 36kW Tankless Electric Water Heater boasts a powerful 36kW heating element that delivers consistent and endless hot water for whole house use. Its ability to provide up to 8.7 gallons per minute ensures that multiple showers and appliances can operate simultaneously without a drop in water temperature. This unit is also designed with a sleek gray finish and compact dimensions, making it an excellent fit for modern homes with limited space.
One of the standout features is the WiFi control, which offers users the convenience of adjusting settings remotely through their smartphone or other smart devices. The LED temperature display enhances user experience by allowing precise temperature monitoring, ensuring comfort and safety. Being ETL certified guarantees that the water heater meets rigorous safety and performance standards, providing peace of mind to the buyer.
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18kw Tankless Water Heater Electric 240v Sivuatek
The 18kW Tankless Water Heater Electric 240V SIVUATEK is ideal for homeowners or renters seeking an efficient and reliable solution for instant hot water throughout their entire house. This product is perfect for those who want to eliminate the wait for hot water and reduce energy consumption with its advanced technology. If you are looking for a compact, powerful, and easy-to-use water heater, this model by SIVUATEK is a great choice.
Pros:
- Self-modulating power ensures optimal energy efficiency and cost savings.
- Provides on-demand instant hot water for the whole house, eliminating cold water waits.
- LED display for easy temperature monitoring and control.
- ETL Certified for safety and quality assurance.
- Compact dimensions (17.26″ H x 12.2″ W x 12.2″ L) save space and allow flexible installation.
Cons:
- Requires a dedicated 240V electrical supply, which may need professional installation.
- May not be suitable for very large households with extremely high simultaneous hot water demand.
- Initial cost can be higher compared to traditional tank water heaters.
The 18kW Tankless Water Heater by SIVUATEK features advanced self-modulating technology that adjusts power usage according to demand. This ensures that the unit operates at maximum efficiency, reducing energy waste and lowering utility bills. The instant hot water capability means you no longer have to wait for water to heat up, providing immediate comfort and convenience for daily tasks such as showering, cooking, and cleaning.
Its LED display offers intuitive temperature control, allowing users to customize the water temperature easily for their preference. Being ETL certified guarantees the product meets rigorous safety and performance standards. Additionally, the compact size and sleek gray design make it a versatile addition to any home without taking up much space. Overall, this water heater combines efficiency, safety, and user-friendly features to deliver a high-quality hot water solution.
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Westinghouse 14kw 240v Smart Wifi Tankless Water Heater Electric
The Westinghouse 14kW 240V Smart WiFi Tankless Water Heater Electric is ideal for homeowners looking for an efficient, space-saving solution to their hot water needs. This product is perfect for tech-savvy users who want to integrate their water heater with smart home systems like Alexa and Google Home, as well as anyone seeking a reliable, energy-efficient upgrade to traditional water heating methods.
Pros:
- Smart WiFi connectivity compatible with Alexa and Google Home for convenient remote control.
- ETL Certified ensuring safety and quality standards.
- Compact design with dimensions of 14.2 x 9.5 x 9.5 inches, saving valuable space.
- Energy-efficient 14kW power rating reduces electricity consumption.
- Durable gray finish with IPX4 water resistance rating for reliable outdoor or indoor installation.
Cons:
- Requires a 240V electrical connection, which may need professional installation.
- Limited to electric supply, not suitable for homes relying on gas heating systems.
The Westinghouse 14kW 240V Smart WiFi Tankless Water Heater offers an advanced heating solution that heats water on demand, eliminating the need for bulky storage tanks. Its smart connectivity features allow users to monitor and control the temperature remotely, enhancing convenience and energy savings. The sleek and compact gray design fits easily in tight spaces, making it suitable for modern homes with limited utility room availability.
Built with safety and durability in mind, this unit is ETL Certified and carries an IPX4 rating, which means it is resistant to splashing water, allowing for versatile installation options. The integration with popular smart home assistants like Alexa and Google Home enables voice commands and scheduling, empowering users to optimize hot water usage and reduce energy costs. Overall, this tankless water heater is a smart upgrade for anyone seeking efficiency, control, and reliability in their home water heating system.
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Rinnai Rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater
The NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater is ideal for homeowners or businesses looking for a highly efficient, reliable, and compact water heating solution. Perfect for those who want to save space while enjoying continuous hot water, this unit is suitable for both indoor and outdoor installations. It is especially beneficial for users with high hot water demands due to its impressive flow rate and energy-efficient design.
Pros:
- Up to 11.1 GPM flow rate providing ample hot water for multiple applications
- 199,000 BTU output for powerful heating performance
- Compatible with both natural gas and propane fuels
- Compact silver design with dimensions of 30.11″ x 18.5″ x 18.5″ and weighing 55 pounds
- Smart Sense technology optimizes efficiency and water temperature control
- Suitable for indoor or outdoor installation, increasing flexibility
Cons:
- Requires professional installation due to its advanced features and fuel type
- Higher initial investment compared to traditional water heaters
- May need additional venting components if installed indoors
The Rinnai RX199iN features advanced Condensing Smart Sense technology, which maximizes energy efficiency by recycling heat that would otherwise be lost. This leads to significant savings on utility bills while reducing environmental impact. Its ability to deliver up to 11.1 gallons per minute ensures that users enjoy an uninterrupted supply of hot water, making it ideal for larger households or commercial applications.
Designed with versatility in mind, this unit supports both natural gas and propane, allowing customers to choose the fuel source that best fits their needs. The compact and sleek silver design not only saves space but also enhances installation options, as it can be mounted indoors or outdoors. With a powerful 199,000 BTU output, it quickly heats water to the desired temperature, reducing wait times and improving overall user comfort.
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Ecosmart Eco 11 Electric Tankless Water Heater
The EcoSmart ECO 11 Electric Tankless Water Heater is ideal for homeowners or renters seeking an energy-efficient and compact solution for on-demand hot water. It is perfect for those with limited space who want to reduce their utility bills while enjoying continuous hot water without the bulk of traditional tank heaters.
Pros:
- Energy-efficient with patented self-modulating technology
- Compact and lightweight design (only 6.5 pounds)
- Provides hot water on demand, eliminating the need for a storage tank
- Easy to install and maintain
- Durable white finish that fits well in most settings
Cons:
- Requires a 240-volt power supply, which might not be available in all homes
- May not be suitable for larger households with high simultaneous hot water demands
- Initial installation cost can be higher compared to traditional water heaters
The EcoSmart ECO 11 boasts a powerful 13KW heating element that operates at 240 volts, delivering reliable hot water on demand. Its patented self-modulating technology adjusts the energy consumption based on the flow rate, ensuring that users only use the energy necessary to heat the water, which maximizes efficiency and reduces electricity bills.
With its compact dimensions (11.5 inches high, 8.0 inches wide, and 3.75 inches long), this water heater fits easily into tight spaces, making it an excellent choice for apartments, small homes, or point-of-use applications. The lightweight design at only 6.5 pounds allows for simple installation, and the durable white exterior ensures it blends seamlessly into any environment. Overall, the EcoSmart ECO 11 combines advanced technology with user-friendly features to provide a smart and sustainable hot water solution.
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Electric Tankless Water Heater Sivuatek
The Electric Tankless Water Heater SIVUATEK 14kW, 240V is ideal for homeowners or renters looking for an efficient and compact solution to provide on-demand hot water for their whole house. It is especially suited for those who want to save space, reduce energy consumption, and enjoy continuous hot water supply at up to two points of use simultaneously. This unit is perfect for small to medium-sized households or properties with limited installation space.
Pros:
- ETL Certified ensuring safety and quality standards.
- Self modulating technology optimizes energy use based on demand.
- Compact design allows for easy installation in tight spaces.
- Provides on-demand hot water, eliminating the need for a bulky storage tank.
- Supports up to two points of use, making it suitable for multiple applications.
- Durable construction with a sleek black finish that fits modern aesthetics.
Cons:
- May require an electrical system upgrade for optimal performance at 240V.
- Limited to 14kW power, which may not suffice for larger households.
- Installation might require professional assistance to meet electrical codes.
The SIVUATEK 14kW Electric Tankless Water Heater boasts a self-modulating feature that adjusts power consumption based on the hot water demand, resulting in significant energy savings without sacrificing performance. Its compact dimensions (17.25 inches height, 12.2 inches width and length) and lightweight design (16 pounds) make it easy to install in various locations, including closets or small utility rooms. This design flexibility is a great advantage for properties with limited space.
Additionally, the unit’s ability to provide continuous hot water to two points of use simultaneously makes it a versatile choice for kitchens, bathrooms, or laundry rooms. Being ETL certified, users can trust the product’s safety and reliability. Overall, this water heater delivers an efficient, space-saving, and eco-friendly solution for modern households seeking a reliable hot water source without the bulk of traditional storage tanks.
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Orbek 14kw Tankless Electric Water Heater
The 14kW Tankless Water Heater Electric by ORBEK is ideal for homeowners or renters seeking an efficient and compact solution for their hot water needs. Perfect for those with limited space who require instant hot water at 2-3 points of use, this on-demand water heater is especially suitable for small apartments, cabins, or single bathrooms and kitchens.
Pros:
- Instant hot water delivery with no waiting time
- Compact design measuring 14.2 x 9.5 x 9.5 inches for easy installation
- LED digital display for precise temperature control
- ETL Certified ensuring safety and quality standards
- Energy-efficient 14kW power with 240 Volt operation
- Supports flow rates up to 3.38 GPM suitable for multiple points of use
Cons:
- May require electrical system upgrade due to high power draw
- Limited to 2-3 point applications, not ideal for whole-house use
- Installation may require professional assistance
The ORBEK 14kW Tankless Water Heater is designed to provide efficient on-demand hot water without the bulk and energy waste of traditional tank heaters. Its compact size allows it to fit conveniently in tight spaces, while the LED digital display offers users easy and accurate temperature adjustments. This ensures consistent comfort and reduces the risk of scalding or cold water surprises.
With a maximum flow rate of 3.38 gallons per minute, it can effectively serve multiple points such as a bathroom sink and a shower simultaneously, making it practical for smaller homes or apartments. Additionally, the unit’s ETL certification guarantees that it meets rigorous safety standards, giving users peace of mind. Overall, this tankless water heater balances performance, safety, and convenience for those in need of a reliable hot water solution.
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Westinghouse Tankless Water Heater Electric
The Westinghouse 18kW 240V Tankless Water Heater Electric is ideal for homeowners or small businesses looking for an efficient, space-saving solution for on-demand hot water. This unit is perfect for those who want to reduce energy consumption without compromising on performance, especially in settings where a consistent supply of hot water is essential. Additionally, tech-savvy users who appreciate smart home integration will benefit from its compatibility with WiFi control, Alexa, and Google Home.
Pros:
- Provides up to 4.2 gallons per minute (GPM) of hot water ensuring continuous flow.
- WiFi control compatible with popular smart home devices like Alexa and Google Home.
- Compact design with dimensions 17.05 x 12.99 x 12.99 inches saves space.
- Energy efficient electric tankless system reduces utility bills.
- ETL certified ensuring safety and quality standards.
- IPX4 rating offers water resistance for durability.
Cons:
- Requires a 240V electrical connection, which might need professional installation.
- May not be suitable for larger households needing higher hot water capacity.
- Initial cost can be higher compared to traditional water heaters.
The Westinghouse 18kW 240V Tankless Water Heater Electric offers a modern solution for on-demand hot water with its high flow rate of up to 4.2 GPM. This means users can enjoy uninterrupted hot water for multiple applications such as showers, sinks, and appliances simultaneously. Its compact gray design fits easily in tight spaces, making it an excellent choice for homes with limited installation areas.
One of the standout features of this water heater is its WiFi control compatibility. Users can conveniently operate the heater remotely via smartphone apps or voice commands using Alexa or Google Home, enhancing user convenience and allowing for precise temperature adjustments. Moreover, the ETL certification and IPX4 water resistance rating ensure that the unit is both safe and durable, providing peace of mind for long-term use.
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Frequently Asked Questions
What Size Tankless Water Heater Suits A Large Home?
For large homes, choose a tankless heater with 18kW or higher power. Models like Rheem 18kW or WINTEMP 36kW deliver sufficient hot water flow for multiple outlets simultaneously.
How Energy Efficient Are Electric Tankless Water Heaters?
Electric tankless heaters use self-modulating technology to save energy. They heat water only when needed, reducing standby losses and lowering electricity bills effectively.
Can I Control Tankless Water Heaters Via Wifi?
Yes, models like Westinghouse 14kW and WINTEMP 36kW offer WiFi control. They allow remote temperature adjustments and monitoring via smartphone or smart home devices.
Are Tankless Water Heaters Suitable For Whole-house Use?
Absolutely. High-capacity units like Rinnai RX199iN and Rheem RTEX-24 provide continuous hot water for entire large homes without running out.
What Is The Average Flow Rate For Large Home Tankless Heaters?
Typically, large home units deliver between 4 to 11 GPM. For example, Rinnai RX199iN offers up to 11. 1 GPM, ideal for multiple simultaneous uses.
How Do Tankless Water Heaters Compare To Traditional Tanks?
Tankless heaters provide endless hot water on demand, save space, and reduce energy costs compared to traditional bulky water tanks.
Conclusion
Choosing the best tankless water heater for a large home means balancing power, efficiency, and features. Models like Rheem RTEX-24 and Rinnai RX199iN offer strong flow rates and smart controls to meet high demand. Electric options such as WINTEMP 36kW and SIVUATEK 18kW provide energy-saving self-modulating technology for consistent hot water.
Consider how many bathrooms and appliances need simultaneous heating before deciding. Look for certifications like ETL to ensure safety and reliability. A good tankless water heater saves space and reduces energy bills over time. Easy installation and smart features like WiFi control can add convenience to your daily routine.
Ultimately, pick a unit that fits your home’s size, hot water needs, and budget. This way, your family enjoys endless hot water without interruptions or waste. A well-chosen heater keeps your large household comfortable all year round.