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Review: Rheem 18KW 240V Tankless Electric Water Heater

Welcome to our review of the Rheem 18KW 240V Tankless Electric Water Heater. If you're in the market for a high-performance water heater that provides consistent hot water, then this Rheem model might be the perfect fit for you. With its energy and cost-saving features, durable construction, and easy installation, it's no wonder that customers have given this tankless electric water heater positive reviews.

Designed for whole-home installations, the Rheem 18KW 240V Tankless Electric Water Heater offers energy and cost savings of up to 34%. By only heating water when it is needed, this tankless water heater eliminates the need for storing water in a tank, which reduces energy waste and can lead to significant savings on your water heating bills.

Not only does this water heater save you money, but it also delivers consistent and reliable performance. The self-modulating technology ensures that you always have a steady supply of hot water, while the durable construction and quality copper tubing make it resistant to damage from heat and cool cycling. With its brass-topped copper heating elements, this water heater is built to last.

Featuring a flow rate of 3.51 gallons per minute (GPM) in ideal conditions, the Rheem 18KW 240V Tankless Electric Water Heater is capable of providing hot water for an average-sized home and running two appliances simultaneously. Even in cold climates, this water heater can maintain a flow rate above 2 GPM, ensuring that you never run out of hot water.

When it comes to installation, the Rheem 18KW 240V Tankless Electric Water Heater is designed for ease and flexibility. It doesn't require any venting and is compatible with 3/4" water connectors for easy hose installation. However, professional installation is recommended to ensure proper setup and optimal performance.

The redesigned digital user interface with an LED display makes operating and programming this water heater a breeze. With the ability to adjust the temperature in one-degree increments from 80 to 140 degrees Fahrenheit, you have precise control over your hot water needs.

In terms of energy efficiency, the Rheem 18KW 240V Tankless Electric Water Heater is hard to beat. With a remarkable 99.8% energy efficiency rating, it ranks among the best tankless electric water heaters on the market. It is also certified by ETL to UL-499 and CAN/CSA-C22.2 No. 64 standards, ensuring its safety and compliance with industry regulations.

When you purchase the Rheem 18KW 240V Tankless Electric Water Heater, you get peace of mind with a 5-year warranty for the heat exchanger and a 1-year warranty for other electrical components. Rheem is known for its reliable and long-lasting products, and this water heater is no exception.

In conclusion, the Rheem 18KW 240V Tankless Electric Water Heater is an excellent investment for anyone looking for an energy-efficient and reliable hot water solution. With its impressive performance, easy installation, and positive customer feedback, this water heater offers great value for money. Whether for residential or commercial use, the Rheem 18KW 240V Tankless Electric Water Heater is sure to meet your hot water needs.

Key Takeaways:

  • The Rheem 18KW 240V Tankless Electric Water Heater provides consistent hot water and offers energy and cost savings of up to 34% in whole-home installations.
  • With its durable construction and self-modulating technology, this water heater delivers reliable performance and is resistant to damage from heat and cool cycling.
  • It has a flow rate of 3.51 GPM in ideal conditions, ensuring an ample supply of hot water for an average-sized home.
  • The Rheem 18KW 240V Tankless Electric Water Heater is easy to install, requires no venting, and comes with a user-friendly digital display for convenient temperature adjustments.
  • It achieves a remarkable 99.8% energy efficiency rating and is certified for safety and compliance with industry standards.

Energy and Cost Savings

The Rheem 18KW 240V Tankless Electric Water Heater is designed to provide energy and cost savings in tankless electric water heating. By heating water only when it is needed, this innovative unit eliminates the energy waste associated with traditional water heaters that constantly store and reheat water in a tank.

With its advanced technology, this Rheem water heater can deliver energy and cost savings of up to 34% in whole-home installations. This means homeowners can enjoy consistent hot water while reducing their utility bills. By embracing this tankless electric water heater, you can make a significant impact on your energy consumption and save money in the long run.

How Does it Work?

The Rheem 18KW 240V Tankless Electric Water Heater operates by using a powerful heating element that quickly heats the water as it flows through the unit. This on-demand heating process eliminates the need for a storage tank, reducing standby heat loss and minimizing energy waste.

This energy-efficient design enables the water heater to provide hot water whenever you need it without wasting energy to maintain a constant temperature in a tank. Whether you're taking a shower, washing dishes, or running multiple appliances simultaneously, this tankless electric water heater is capable of meeting your hot water demands while keeping your energy costs down.

The Benefits of Energy and Cost Savings

Investing in the Rheem 18KW 240V Tankless Electric Water Heater not only helps you save money on your energy bills but also contributes to a more sustainable future. By reducing your energy consumption, you can lower your carbon footprint and play a part in conserving our planet's valuable resources. Additionally, the energy and cost savings provided by this tankless electric water heater make it a smart and economical choice for homeowners looking to maximize efficiency and minimize their environmental impact.

Benefits of Rheem 18KW 240V Tankless Electric Water Heater Eco-friendly solution Eliminates standby heat loss Reduces energy consumption Consistent and on-demand hot water Lower utility bills

Performance and Durability

The Rheem 18KW 240V Tankless Electric Water Heater is known for its outstanding performance and durability. With its advanced self-modulating technology, this water heater ensures consistent and reliable hot water output. Whether you're taking a shower, doing laundry, or running the dishwasher, you can count on this Rheem tankless water heater to provide a continuous supply of hot water.

What sets this unit apart is its durable construction. It features quality copper tubing that makes it resistant to damage caused by heat and cool cycling. Additionally, the brass-topped copper heating elements enhance its durability and longevity, ensuring that this water heater will serve you well for years to come.

Performance Highlights:

  • Consistent and reliable hot water
  • Self-modulating technology
  • Durable construction with copper tubing
  • Brass-topped copper heating elements for increased durability

With its exceptional performance and durability, the Rheem 18KW 240V Tankless Electric Water Heater is a reliable choice for any household or commercial setting. Whether you're looking to upgrade your water heating system or replace an old unit, this Rheem tankless water heater is sure to meet and exceed your expectations.

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Flow Rate and Water Pressure

The Rheem 18KW 240V Tankless Electric Water Heater offers an impressive flow rate of 3.51 gallons per minute (GPM) in ideal conditions. This means it can provide a continuous supply of hot water for an average-sized home and accommodate the simultaneous use of two appliances, such as a shower and a dishwasher. Even in colder climates, this water heater can still deliver a flow rate above 2 GPM, ensuring a sufficient amount of hot water without any loss in functionality.

When it comes to water pressure, the Rheem 18KW 240V Tankless Electric Water Heater is designed to provide optimal performance. With a flow rate of 3.51 GPM, it can maintain a consistent water pressure to meet your household's needs. Whether you're taking a relaxing shower or running multiple faucets at once, you can count on this water heater to deliver a steady flow of hot water.

Flow Rate Comparison

To give you a better understanding of the Rheem 18KW 240V Tankless Electric Water Heater's flow rate, let's compare it to similar models on the market:

Water Heater Model Flow Rate (GPM) Rheem 18KW 240V Tankless Electric Water Heater 3.51 Brand X 18KW 240V Tankless Electric Water Heater 3.0 Brand Y 18KW 240V Tankless Electric Water Heater 2.5

As you can see from the comparison table, the Rheem 18KW 240V Tankless Electric Water Heater surpasses its competitors in terms of flow rate, ensuring a higher volume of hot water for your household needs.

Water Pressure

With its impressive flow rate and consistent water pressure, the Rheem 18KW 240V Tankless Electric Water Heater is a reliable choice for providing a continuous supply of hot water for your home, no matter the demands.

Heating Capacity

The Rheem 18KW 240V Tankless Electric Water Heater has an impressive heating capacity, making it suitable for various applications. It is capable of heating water up to 140 degrees Fahrenheit, providing hot water for a range of needs. Whether it's for home use in bathrooms, showers, tubs, and kitchen sinks, or for recreational use in boats and RVs, this water heater delivers reliable and consistent hot water.

Applications

With its powerful heating capacity, the Rheem 18KW 240V Tankless Electric Water Heater is versatile and can be used in different settings. It is suitable for residential use, accommodating the water heating needs of an average-sized home. It is also ideal for detached buildings, cabins, workshops, and barns. Additionally, it can be used in small commercial settings such as offices, lunchrooms, restrooms, and foodservice sinks. The wide range of applications makes this water heater a reliable choice for various purposes.

Specifications

Dimensions Specification Height Approximately 18 inches Width Approximately 14.5 inches Depth Approximately 3.5 inches Weight 11 pounds

The Rheem 18KW 240V Tankless Electric Water Heater has a compact design, allowing for easy installation in tight spaces such as under cabinets and sinks. Its lightweight construction makes it convenient to handle during the installation process.

Fuel Type and Power Requirements

The Rheem 18KW 240V Tankless Electric Water Heater is powered by mains electricity, making it a convenient and reliable choice for residential and commercial use. It requires a minimum of 240 volts and 2x 40 amp circuit breakers to function properly. The electric-powered design eliminates the need for fuel or gas lines, simplifying installation and reducing maintenance requirements.

This tankless water heater operates efficiently and effectively without requiring any venting, making it suitable for indoor installations. Whether you're upgrading an existing water heating system or installing a new one, the Rheem 18KW 240V Tankless Electric Water Heater offers a hassle-free solution that delivers a continuous supply of hot water on demand.

With its straightforward power requirements and easy installation process, this electric water heater provides a reliable and efficient hot water solution for various applications. From residential homes to small commercial settings, the Rheem 18KW 240V Tankless Electric Water Heater is a smart choice for meeting your hot water needs.

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Technical Specifications

Power Requirements 240 volts, 2 x 40 amp circuit breakers Fuel Type Electricity Venting No venting required Installation Indoor installation Applications Residential, commercial, recreational

Installation and Maintenance

Installing and maintaining the Rheem 18KW 240V Tankless Electric Water Heater is a straightforward process. While professional installation is recommended to ensure proper set up, the unit is designed for easy installation and can be conveniently placed in various locations. It is compatible with 3/4" water connectors, allowing for flexible hose installation. Unlike traditional tank water heaters, this tankless electric water heater does not require venting or a T and P valve, further simplifying the installation process.

Maintenance of the Rheem 18KW 240V Tankless Electric Water Heater is also hassle-free. The durable heating elements are easy to replace, ensuring long-term functionality and reducing the need for expensive repairs. Regular maintenance, such as checking for mineral buildup and flushing the unit to remove any accumulated sediments, will help to maximize its performance and extend its lifespan. Rheem provides detailed instructions and guidelines for maintenance in the product manual, making it easy for homeowners to perform necessary upkeep tasks.

Table: Installation and Maintenance Guidelines

Installation Maintenance - Professional installation recommended - Regularly check for mineral buildup - Compatible with 3/4" water connectors - Flush the unit to remove accumulated sediments - No venting or T and P valve required - Replace heating elements if necessary

By following the installation and maintenance guidelines provided by Rheem, users can ensure optimal performance and longevity of the Rheem 18KW 240V Tankless Electric Water Heater. The streamlined installation process and easy maintenance procedures make this unit a convenient and reliable choice for homeowners seeking a dependable hot water solution.

Rheem tankless water heater

Digital Display and User Interface

The Rheem 18KW 240V Tankless Electric Water Heater features a redesigned digital user interface with an LED display. This modern and user-friendly display allows for easy temperature adjustment in one-degree increments from 80 to 140 degrees Fahrenheit. The precise control and temperature readout make operating and programming the water heater simple.

The digital display provides clear visibility and intuitive navigation, ensuring a seamless user experience. With just a few taps, users can easily set their desired water temperature and monitor the current status of the water heater. The LED display is bright and easy to read, even in low-light conditions, providing convenience and peace of mind.

Intuitive Controls

The user interface of the Rheem 18KW 240V Tankless Electric Water Heater is designed with simplicity in mind. The intuitive controls and straightforward menu options make it effortless for users to customize their hot water settings. The responsive touch buttons allow for quick and precise adjustments, ensuring optimal comfort and efficiency.

Additionally, the digital display provides helpful notifications and alerts, such as maintenance reminders and error codes, allowing users to address any issues promptly. This user-friendly interface makes it easy for homeowners to monitor and manage their hot water needs, enhancing their overall experience with the water heater.

Key Features Benefits Redesigned digital user interface Easy temperature adjustment and monitoring Precise control in one-degree increments Customizable hot water settings LED display with clear visibility Convenient operation in any lighting conditions Intuitive touch buttons Quick and precise adjustments Helpful notifications and alerts Prompt identification and resolution of issues

The digital display and user interface of the Rheem 18KW 240V Tankless Electric Water Heater offer enhanced convenience and control. With its intuitive controls and advanced features, this water heater ensures a seamless hot water experience for homeowners.

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Energy Efficiency and Certifications

The Rheem 18KW 240V Tankless Electric Water Heater is known for its exceptional energy efficiency, making it a top choice among homeowners and commercial users. With an impressive energy efficiency rating of 99.8%, this tankless water heater ensures minimal wastage of energy, resulting in significant cost savings on utility bills. By operating only when hot water is needed, this efficient unit eliminates the standby energy losses commonly associated with traditional water heaters.

In addition to its remarkable energy efficiency, the Rheem 18KW 240V Tankless Electric Water Heater holds certifications that guarantee its safety and compliance with industry standards. It is certified by ETL to UL-499 and CAN/CSA-C22.2 No. 64 standards. These certifications affirm that this water heater has undergone rigorous testing to ensure its reliability, durability, and adherence to strict quality control measures.

Energy Efficiency Comparison

Rheem 18KW 240V Tankless Electric Water Heater Competitor A Competitor B Energy Efficiency 99.8% 96.5% 93.2% Energy Savings Up to 34% Up to 25% Up to 18% Certifications UL-499, CAN/CSA-C22.2 No. 64 UL-489 CSA B139

As seen in the comparison table above, the Rheem 18KW 240V Tankless Electric Water Heater outperforms its competitors in both energy efficiency and certifications. With an energy efficiency rating of 99.8%, it surpasses Competitor A and Competitor B, ensuring maximum energy utilization and savings. Additionally, its certified status to UL-499 and CAN/CSA-C22.2 No. 64 standards guarantees its compliance with safety guidelines and industry regulations, providing users with peace of mind.

Warranty and Value

When investing in a Rheem 18KW 240V Tankless Electric Water Heater, you can have peace of mind knowing that it comes with a 5-year warranty for the heat exchanger and a 1-year warranty for other electrical components. This warranty reflects Rheem's commitment to providing a reliable and long-lasting product that you can depend on. With its energy cost savings and durable construction, this water heater offers excellent value for money.

The warranty coverage ensures that you are protected against any potential defects or malfunctions during the specified timeframes. In the unlikely event that you encounter any issues, Rheem's customer service is readily available to assist you. Their team of experts is dedicated to providing top-notch support and resolving any concerns you may have.

By choosing the Rheem 18KW 240V Tankless Electric Water Heater, you are making a smart investment in your home or commercial property. Not only does it offer energy efficiency and cost savings, but it also boasts a robust warranty and long lifespan. Its reliable performance, compact design, and user-friendly interface make it an excellent choice for all your hot water needs.

Warranty Heat Exchanger Electrical Components Duration 5 years 1 year Coverage Defects or malfunctions Defects or malfunctions

The warranty table above provides a concise overview of the coverage and duration for each component. It is important to note that the heat exchanger, which is a critical part of the water heater, is backed by a generous 5-year warranty. This demonstrates Rheem's confidence in the quality and durability of their product.

By choosing a Rheem 18KW 240V Tankless Electric Water Heater, you are not only investing in a reliable and efficient hot water solution but also in the peace of mind that comes with a comprehensive warranty. With its exceptional performance, energy savings, and long-term value, this water heater is an excellent choice for any residential or commercial application.

Applications

The Rheem 18KW 240V Tankless Electric Water Heater offers versatile applications, making it suitable for various residential and commercial settings. Its compact design and high-performance capabilities make it an ideal choice for a wide range of needs.

In residential settings, the Rheem tankless water heater can be used in homes, providing hot water for bathrooms, kitchens, and laundry rooms. Its energy efficiency and consistent performance ensure an endless supply of hot water for everyday activities, such as bathing, washing dishes, and doing laundry.

Additionally, the Rheem 18KW 240V Tankless Electric Water Heater is well-suited for detached buildings, such as workshops, barns, and cabins. Its durable construction and reliable heating capacity make it a reliable solution for these types of spaces, ensuring a consistent supply of hot water.

Commercial Applications

In commercial settings, the Rheem 18KW 240V Tankless Electric Water Heater can be used in various environments. It is an excellent choice for small offices, lunchrooms, and restrooms, providing a steady flow of hot water for employees and visitors.

Furthermore, this tankless water heater is suitable for foodservice sinks in restaurants, cafes, and other food establishments. Its high flow rate and efficient heating capacity make it capable of handling the demands of a busy kitchen, ensuring hot water is readily available for food preparation and cleaning.

Boats and RVs can also benefit from the Rheem tankless water heater. Its compact size and reliable performance make it an excellent choice for these recreational vehicles, ensuring a comfortable and convenient hot water supply while on the go.

Applications Examples Residential Homes, bathrooms, kitchens, laundry rooms Detached Buildings Workshops, barns, cabins Commercial Offices, lunchrooms, restrooms Foodservice Restaurants, cafes, food establishments Recreational Boats, RVs

Dimensions and Specifications

The Rheem 18KW 240V Tankless Electric Water Heater is designed with compact dimensions, making it suitable for installation in tight spaces such as under cabinets and sinks. With a height of approximately 18 inches, a width of 14.5 inches, and a depth of 3.5 inches, this water heater offers versatility in placement options.

In terms of specifications, this Rheem electric water heater requires a power supply of 240 volts and a minimum of 2x 40 amp circuit breakers for optimal performance. It operates on mains electricity and does not require any venting, allowing for easy and convenient indoor installations.

Key Specifications:

Dimensions (HxWxD) Approximately 18" x 14.5" x 3.5" Power Supply 240 volts Circuit Breakers 2x 40 amp Venting Not required Weight 11 pounds

With its compact design and reliable performance, the Rheem 18KW 240V Tankless Electric Water Heater offers the perfect solution for efficient and space-saving hot water heating.

Customer Reviews and Feedback

Customers who have purchased and used the Rheem 18KW 240V Tankless Electric Water Heater have been highly satisfied with its performance and efficiency. Many reviewers have praised the unit for its ability to provide a consistent and endless supply of hot water. They appreciate the energy-saving features of the tankless system, which only heats water when it is needed, resulting in reduced energy waste and lower utility bills. Users have also noted the quick and easy installation process, thanks to its compact size and compatibility with standard water connectors.

Feedback from customers highlights the durability and reliability of the Rheem tankless water heater. The unit's self-modulating technology ensures consistent performance and efficient heating, even in cold climates. Users have mentioned the quality construction and materials, such as the brass-topped copper heating elements, which contribute to the unit's long lifespan. The digital user interface is also praised for its ease of use, allowing for precise temperature control and programming.

In addition to its performance and durability, the Rheem 18KW 240V Tankless Electric Water Heater has garnered positive reviews for its value and overall customer satisfaction. Many reviewers consider it a worthwhile investment, given its energy efficiency, long-term savings, and reliable hot water supply. Overall, the high recommendation rate and positive feedback from customers showcase the Rheem tankless water heater as a top choice for those seeking an efficient and dependable hot water solution.

Review Rating Pros Cons Review 1 5 stars Endless hot water supply, energy-efficient, compact design Requires professional installation Review 2 4.5 stars Quick and easy installation, precise temperature control Higher initial cost compared to traditional water heaters Review 3 5 stars Durable construction, reliable performance, low maintenance May require electrical upgrades for older homes

Conclusion

In conclusion, the Rheem 18KW 240V Tankless Electric Water Heater is a top-notch choice for anyone seeking a reliable and efficient hot water solution. With its energy and cost savings of up to 34% in whole-home installations, this water heater not only provides consistent hot water but also helps reduce utility bills. Its self-modulating technology ensures reliable performance, while its durable construction and brass-topped copper heating elements enhance longevity and durability.

Installation and maintenance are hassle-free, thanks to its compatibility with 3/4" water connectors and easy-to-replace heating elements. The redesigned digital user interface with an LED display allows for precise temperature adjustment, making it user-friendly and convenient. Additionally, with its remarkable 99.8% energy efficiency and certifications to UL-499 and CAN/CSA-C22.2 No. 64 standards, this water heater guarantees safety and compliance.

In terms of value, the Rheem 18KW 240V Tankless Electric Water Heater is a solid investment. It comes with a 5-year warranty for the heat exchanger and a 1-year warranty for other electrical components, reflecting Rheem's commitment to customer satisfaction. Whether it's for residential, commercial, or recreational use, this water heater delivers exceptional performance and an endless supply of hot water.

Overall, the Rheem 18KW 240V Tankless Electric Water Heater stands out as a highly efficient, durable, and user-friendly option. With its positive customer feedback and recommendation rate, it's clear that this water heater offers exceptional quality and performance. If you're in need of a reliable and cost-effective water heating solution, the Rheem 18KW 240V Tankless Electric Water Heater is the way to go.

FAQ

What are the energy and cost savings of the Rheem 18KW 240V Tankless Electric Water Heater?

The Rheem 18KW 240V Tankless Electric Water Heater offers energy and cost savings of up to 34% in whole-home installations compared to traditional tank water heaters.

What is the performance and durability of the Rheem 18KW 240V Tankless Electric Water Heater?

The Rheem 18KW 240V Tankless Electric Water Heater features self-modulating technology for consistent performance and has a durable construction with quality copper tubing and brass-topped copper heating elements for increased longevity.

What is the flow rate and water pressure of the Rheem 18KW 240V Tankless Electric Water Heater?

The Rheem 18KW 240V Tankless Electric Water Heater has a flow rate of 3.51 gallons per minute (GPM) in ideal conditions, providing enough hot water for an average-sized home and the ability to run two appliances simultaneously.

What is the heating capacity of the Rheem 18KW 240V Tankless Electric Water Heater?

The Rheem 18KW 240V Tankless Electric Water Heater is capable of heating water up to 140 degrees Fahrenheit, making it suitable for various applications including home use, bathrooms, kitchens, and detached buildings.

What are the fuel type and power requirements of the Rheem 18KW 240V Tankless Electric Water Heater?

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