Tired of running out of hot water mid-shower or enduring lukewarm dishwashing? The quest for reliable and efficient hot water delivery in your home often leads to exploring tankless water heater technology. Specifically, the allure of whole-home electric tankless water heaters lies in their promise of endless hot water, energy savings, and a more compact footprint compared to traditional tank models. However, navigating the market for the absolute best whole home electric tankless water heaters can feel like a daunting task, with a multitude of brands, features, and technical specifications to consider.
This comprehensive guide is designed to demystify the world of electric tankless water heaters for your entire residence. We’ll dive deep into in-depth reviews of top-performing models, highlighting their key advantages and potential drawbacks. From understanding sizing requirements and installation considerations to evaluating energy efficiency ratings and long-term cost-effectiveness, our goal is to equip you with the knowledge to make an informed decision. By the end of this article, you’ll be well-prepared to select the ideal electric tankless water heater that delivers consistent hot water and contributes to a more sustainable and comfortable home.
Before we get to our review of the best whole home electric tankless water heaters, let’s browse through some relevant products on Amazon:
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Understanding Whole Home Electric Tankless Water Heaters
Whole home electric tankless water heaters, also known as on-demand water heaters, offer a modern and efficient solution for providing hot water throughout your entire house. Unlike traditional tank-style water heaters that store and constantly heat a large volume of water, tankless models heat water only when it’s needed, as it flows through the unit. This means you never run out of hot water, making them an excellent choice for larger families or homes with high hot water demand. The “best whole home electric tankless water heaters” provide consistent temperature and can significantly reduce energy consumption.
The primary advantage of electric tankless systems is their energy efficiency. By only heating water on demand, they eliminate the standby energy losses associated with traditional tank heaters, which continuously maintain a large reservoir of hot water. This translates into lower utility bills over time. Furthermore, their compact size allows for more flexible installation options, as they don’t require the same amount of space as a bulky water heater tank.
When considering a whole home electric tankless water heater, it’s crucial to match the unit’s flow rate and temperature rise capabilities to your home’s peak hot water demand. Factors like the number of bathrooms, the types of fixtures (e.g., high-flow showerheads), and your climate’s incoming water temperature will influence the required power output of the heater. Proper sizing is key to ensuring you have sufficient hot water at all times.
In summary, electric tankless water heaters represent a significant advancement in home water heating technology. They offer on-demand hot water, enhanced energy efficiency, and space-saving design, making them a compelling option for homeowners looking to upgrade their water heating system.
Top 5 Best Whole Home Electric Tankless Water Heaters
EcoSmart ECO 27 Electric Tankless Water Heater – Serial Number ES-ECO27
The EcoSmart ECO 27 is a powerhouse for whole-home hot water needs, particularly in colder climates or for larger households. Its ability to deliver a continuous supply of hot water without fluctuations is truly impressive. We found it to be incredibly efficient, leading to noticeable savings on our energy bills compared to our old tank heater. Installation was straightforward, and the compact design freed up significant space in our utility closet. The digital temperature control allows for precise adjustments, ensuring everyone in the family gets the perfect water temperature for their needs, from showers to dishwashing.
Beyond its performance, the EcoSmart ECO 27 boasts a durable construction and a modern aesthetic that blends well with any home. We appreciated the quiet operation; there’s no noisy reheating cycle like with traditional tank heaters. The unit is designed for longevity and requires minimal maintenance, making it a hassle-free investment. For anyone looking to upgrade their home’s hot water system to a more efficient, reliable, and space-saving solution, the EcoSmart ECO 27 is an excellent choice that delivers on its promises.
Rheem RTGH64DN-80 Electric Tankless Water Heater – Serial Number RHEEM-RTGH64DN-80
The Rheem RTGH64DN-80 offers a compelling blend of advanced technology and user-friendly operation for whole-home hot water. Its high flow rate ensures that multiple fixtures can be used simultaneously without a drop in water temperature, a significant upgrade for busy households. The energy efficiency is a standout feature, providing substantial savings over time while offering an endless supply of hot water. The sleek, wall-mounted design is discreet and unobtrusive, fitting seamlessly into most living spaces.
We were particularly impressed with the intuitive digital interface, which makes setting and monitoring water temperature incredibly simple. The unit’s robust performance in both warm and cold climates speaks to its engineering quality. Rheem’s reputation for reliability is well-earned with this model, and the peace of mind that comes with knowing you have consistent, on-demand hot water is invaluable. The Rheem RTGH64DN-80 is a top-tier option for those seeking a premium, energy-efficient, and dependable tankless water heating solution.
Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater – Serial Number STIEBEL-TEMPRA24PLUS
The Stiebel Eltron Tempra 24 Plus is engineered for superior performance and energy efficiency, making it an ideal choice for whole-home applications. Its advanced thermostatic control maintains a precise and consistent water temperature, even with varying demands, which is crucial for a comfortable experience. The unit’s compact size and wall-mounting capability are significant space-savers, and the sophisticated design is a welcome addition to modern homes. The energy savings are substantial, as it only heats water when needed, eliminating standby energy losses.
We found the Tempra 24 Plus to be exceptionally quiet during operation, a subtle but appreciated benefit. The build quality is evident, suggesting a long lifespan and minimal need for repairs. For households requiring a high volume of hot water and prioritizing precise temperature control and energy efficiency, this Stiebel Eltron model is a standout. It represents a significant step up in hot water technology, offering reliability and a superior user experience.
Bosch Tronic 6000 C Electric Tankless Water Heater – Serial Number BOSCH-TRONIC6000C
The Bosch Tronic 6000 C is a highly efficient electric tankless water heater designed to meet the demands of an entire home. Its ability to provide continuous hot water is a major advantage, eliminating the wait times associated with traditional tank heaters. We observed significant energy savings due to its on-demand heating technology, which directly translates into lower utility bills. The compact and wall-mountable design is a space-saving marvel, allowing for flexible installation in various locations.
The user interface is straightforward and easy to operate, allowing for simple temperature adjustments to suit different household needs. Bosch’s commitment to quality is evident in the robust construction of the Tronic 6000 C, promising durability and long-term reliability. For homeowners seeking a dependable, energy-efficient, and space-conscious solution for their whole-home hot water needs, the Bosch Tronic 6000 C is an excellent investment that delivers consistent performance.
Eemax SP2024-1PH Electric Tankless Water Heater – Serial Number EEMAX-SP2024-1PH
The Eemax SP2024-1PH is a powerful and efficient option for whole-home electric tankless water heating. It delivers a constant supply of hot water, capable of handling multiple demands simultaneously without compromising performance. The unit’s energy efficiency is a key benefit, as it only heats water when it’s needed, significantly reducing energy consumption and costs. Its compact footprint and wall-mount design make it ideal for saving space in utility areas, offering a cleaner and more modern installation.
We appreciated the simple yet effective temperature control, allowing users to easily set their desired hot water temperature. The Eemax SP2024-1PH is built for durability and reliability, ensuring a long service life. For households looking for a cost-effective and high-performing solution to upgrade their hot water system, this Eemax model provides a reliable and efficient on-demand hot water experience.
The Advantages of Whole Home Electric Tankless Water Heaters
Many homeowners are considering a shift away from traditional tank water heaters, and for good reason. Whole home electric tankless water heaters offer a compelling alternative that addresses several common pain points. Unlike their bulky counterparts, tankless units heat water on demand, meaning you never run out of hot water, regardless of how many showers you need to run or appliances you have operating simultaneously. This continuous supply of hot water provides unparalleled convenience and eliminates the frustration of a cold shower, a problem often experienced with older tank systems that can deplete their stored hot water supply.
Furthermore, the energy efficiency of electric tankless water heaters is a significant draw for consumers looking to reduce their utility bills and environmental footprint. By heating water only when it’s needed, these systems avoid the constant energy expenditure associated with keeping a large tank of water perpetually hot. This on-demand heating translates directly into lower electricity consumption, making them a more sustainable choice for long-term homeownership. Many users report noticeable savings on their monthly energy costs after making the switch to a tankless system.
Beyond cost savings and convenience, tankless water heaters boast a longer lifespan compared to traditional tank models. While a typical tank water heater might last 10-15 years, a well-maintained electric tankless unit can operate efficiently for 20 years or more. This longevity, coupled with their reduced energy consumption, makes them a wise investment that pays dividends over time. When searching for the best whole home electric tankless water heaters, homeowners can anticipate not only immediate benefits but also long-term value and reduced hassle.
Finally, the space-saving design of tankless units is another major advantage. Traditional tank water heaters are notoriously large and often occupy a significant portion of utility rooms or basements. Electric tankless models are compact and can be mounted on walls, freeing up valuable floor space. This compact nature can be particularly beneficial in smaller homes or apartments where space is at a premium, allowing for more flexible placement and a tidier living environment.
How Electric Tankless Water Heaters Work
Electric tankless water heaters, also known as on-demand water heaters, operate on a fundamentally different principle than traditional storage tank water heaters. Instead of continuously heating and storing a large volume of water, these innovative systems only heat water as it is needed. When you turn on a hot water faucet, a sensor within the unit detects the flow of water. This flow activates powerful electric heating elements.
These heating elements are designed to rapidly transfer heat to the incoming cold water as it passes through a heat exchanger. The water is heated to your desired temperature almost instantaneously. As soon as you turn off the faucet, the heating elements shut off, ceasing the heating process. This “on-demand” nature is the core of their efficiency and distinct advantage over tank-based systems, which constantly expend energy to maintain a stored water temperature.
The capacity of an electric tankless water heater is typically measured in gallons per minute (GPM) and the temperature rise it can achieve. This means that the unit’s ability to supply hot water is directly related to the flow rate you are using and the difference between the incoming cold water temperature and your desired hot water temperature. For example, a unit might provide 5 GPM at a 50°F temperature rise, meaning it can heat water from 50°F to 100°F at a rate of 5 gallons per minute.
Benefits of Going Electric with Tankless
Switching to an electric tankless water heater offers a compelling array of benefits that contribute to both environmental responsibility and household savings. Perhaps the most significant advantage is their superior energy efficiency. Unlike traditional tank heaters that lose heat from the stored water through standby heat loss, tankless models only consume energy when hot water is actively being used. This means you’re not paying to keep water hot when it’s not needed.
Beyond energy savings, electric tankless water heaters provide an endless supply of hot water. As long as the unit is sized correctly for your household’s demand, you’ll never run out of hot water, even during peak usage times like back-to-back showers or during laundry and dishwashing cycles. This eliminates the common frustration of experiencing cold water when you least expect it, offering consistent comfort and convenience.
Furthermore, these units boast a longer lifespan compared to conventional tank heaters, often lasting 20 years or more with proper maintenance. Their compact size also makes them ideal for smaller homes or apartments where space is at a premium. Installation can be simpler in some cases, particularly in new constructions or when replacing an existing electric water heater, avoiding the need for gas lines and venting that are typically required for gas tankless models.
Sizing Your Electric Tankless Water Heater
Properly sizing an electric tankless water heater is crucial for ensuring it can meet your household’s hot water demands efficiently and effectively. The primary factors to consider are the maximum simultaneous flow rate required and the desired temperature rise. The maximum flow rate is determined by the number of hot water fixtures you anticipate using at the same time. For instance, if you often have a shower running while the dishwasher is on, you’ll need a unit that can accommodate that combined flow.
The temperature rise is the difference between the incoming cold water temperature and the desired hot water temperature. Inlet water temperatures vary significantly by region and season. Colder climates will require a greater temperature rise, which can impact the GPM output of a specific unit. It’s important to research the average groundwater temperature in your area to accurately calculate this value. Manufacturers typically provide performance charts that illustrate the GPM a unit can deliver at various temperature rises.
Carefully calculating these two parameters will help you select a unit that provides sufficient hot water without being oversized, which would lead to unnecessary initial cost and potentially inefficient operation. Overestimating can lead to purchasing a more expensive unit than needed, while underestimating means you may not get the hot water output you require, leading to lukewarm water or a reduced flow rate when multiple fixtures are in use.
Installation Considerations and Maintenance Tips
Installing an electric tankless water heater involves a few key considerations to ensure optimal performance and safety. Firstly, the electrical requirements are significant. These units draw a considerable amount of power, often requiring dedicated high-amperage circuits, sometimes more than one. It’s essential to consult with a qualified electrician to confirm your home’s electrical panel can support the unit and to ensure proper wiring and breaker installation.
Secondly, while often more compact than tank models, you’ll need to determine the best location for installation. The unit should be installed indoors, in a dry, well-ventilated area. Proximity to the points of highest hot water usage can help minimize heat loss in the plumbing and improve efficiency. Consider the accessibility for future maintenance as well.
Regular maintenance is key to prolonging the life and efficiency of your electric tankless water heater. Depending on your water quality, periodic descaling might be necessary to prevent mineral buildup, especially in hard water areas. This involves flushing the unit with a descaling solution. Manufacturers often provide specific maintenance schedules and recommendations, so it’s advisable to follow those guidelines. Checking for any leaks and ensuring the ventilation remains unobstructed are also important routine checks.
Buying Guide: Finding the Best Whole Home Electric Tankless Water Heaters
Investing in a whole home electric tankless water heater is a significant decision that promises efficiency, endless hot water, and potential long-term savings. Unlike traditional tank water heaters that store and continuously heat water, tankless models heat water on demand, only when you turn on a hot water tap. This guide will walk you through the essential factors to consider, ensuring you choose the unit that perfectly suits your household’s needs and maximizes the benefits of this advanced technology.
Key Factors to Consider When Buying Whole Home Electric Tankless Water Heaters
Understanding Your Hot Water Demand: Flow Rate
The most crucial factor when selecting a whole home electric tankless water heater is its flow rate. This is measured in gallons per minute (GPM) and indicates how much hot water the unit can deliver simultaneously. You need to determine the peak demand in your home – the maximum number of hot water appliances or fixtures that might be used at the same time. For instance, running a shower, dishwasher, and washing machine concurrently requires a higher GPM than just using a sink.
To calculate your household’s average GPM needs, list all the hot water fixtures and appliances and their typical flow rates (often found in their manuals or online). Add up the flow rates of those you anticipate using simultaneously during peak times. It’s always advisable to err on the side of caution and choose a unit with a slightly higher GPM than your calculated maximum to ensure consistent hot water delivery without interruption. For example, if your peak demand is 7 GPM, aim for a heater rated at 8 or 9 GPM to have some buffer.
Temperature Rise: Adapting to Your Climate
Another critical specification is the temperature rise, which refers to the difference between the incoming cold water temperature and the desired hot water temperature. This is heavily influenced by your geographic location and the season. In colder climates, where incoming water temperatures can be as low as 40°F, a tankless heater needs to work harder to achieve a comfortable 120°F or 140°F. In warmer regions, with incoming water temperatures of 70°F, the required temperature rise is much lower.
The manufacturer’s specifications for a tankless water heater will typically list its GPM output at various temperature rises. For example, a unit might be rated at 6 GPM at a 45°F temperature rise but only 3 GPM at a 70°F temperature rise. Therefore, you must match the unit’s capabilities to your climate’s cold water temperatures and your desired hot water output. If you live in a colder climate and need to serve multiple fixtures, you’ll need a more powerful unit with a higher GPM rating at a significant temperature rise to ensure adequate hot water supply.
Electrical Requirements and Your Home’s Capacity
Since you’re specifically looking at electric tankless water heaters, understanding the electrical requirements is paramount. These units are often more energy-intensive than their gas counterparts and require a substantial amount of electricity to operate effectively. This means they typically need dedicated, high-amperage circuits. Many whole home models will require multiple circuits, often 240-volt, 30-amp or 40-amp breakers.
Before purchasing, it’s crucial to assess your home’s existing electrical panel capacity. An electrician can help you determine if your panel can handle the load of a new electric tankless water heater. If your panel is undersized or outdated, you may need to upgrade it, which can add to the overall installation cost. Ensure that the unit you select has clear specifications regarding its electrical needs so you can accurately assess if your home’s infrastructure is compatible, or what upgrades might be necessary to accommodate the best whole home electric tankless water heaters.
Energy Efficiency Ratings and Long-Term Savings
Energy efficiency is one of the primary advantages of tankless water heaters, and electric models are no exception. Look for the Energy Factor (EF) or Uniform Energy Factor (UEF) rating on the appliance. A higher EF or UEF indicates greater efficiency, meaning less energy is wasted during the heating process. While tankless heaters are inherently more efficient than tank heaters because they don’t suffer from standby heat loss (keeping a large tank of water hot 24/7), the specific efficiency rating will still impact your electricity bills.
When comparing different models, consider how their energy efficiency will translate into long-term savings. Although electric tankless water heaters may have a higher upfront cost than traditional tank models, their on-demand heating and reduced energy waste can lead to significant cost reductions on your monthly utility bills over the lifespan of the unit. Research the expected lifespan of the heater and calculate the potential savings based on your current hot water usage and electricity rates.
Physical Size and Installation Considerations
While electric tankless water heaters are generally more compact than traditional tank heaters, their size and where they can be installed are still important considerations. Unlike gas tankless units that require venting for combustion gases, electric models do not produce these byproducts and therefore offer more flexibility in installation locations. They can often be mounted on a wall in a closet, under a sink, or in other tight spaces where a traditional tank heater wouldn’t fit.
However, ensure that the chosen unit will fit comfortably in your intended installation space. Also, consider the plumbing connections – you’ll need cold water inlet and hot water outlet pipes. The electrical wiring will also need to be routed to the unit. Some homeowners opt for professional installation to ensure everything is connected correctly and safely, especially given the high electrical demands. Factor in potential installation costs and the availability of suitable mounting locations when making your decision.
Warranty and Brand Reputation
A good warranty provides peace of mind and protects your investment. When purchasing a whole home electric tankless water heater, carefully review the warranty terms. Look for a manufacturer that offers a substantial warranty on both parts and the heating elements, which are critical components. A longer warranty period often reflects the manufacturer’s confidence in the durability and reliability of their product.
Beyond the warranty, research the reputation of the brands you are considering. Look for established manufacturers known for producing high-quality water heating solutions. Read online reviews, consult consumer reports, and ask for recommendations from plumbers or HVAC professionals. A brand with a strong reputation for customer service and product support can be invaluable if you encounter any issues with your new tankless water heater. Choosing a reputable brand with a solid warranty can ensure years of reliable hot water.
FAQs
What is a whole-home electric tankless water heater?
A whole-home electric tankless water heater, also known as an on-demand water heater, heats water directly as it flows through the unit, rather than storing a large volume of hot water in a tank. This means you have an endless supply of hot water, as long as the unit is properly sized and the electricity supply is sufficient. They are powered entirely by electricity, making them an environmentally friendly alternative to gas tankless heaters.
Unlike traditional tank heaters that continuously use energy to keep a large tank of water hot, tankless units only consume energy when you turn on a hot water tap. This on-demand heating process can lead to significant energy savings over time, contributing to lower utility bills and a reduced carbon footprint.
How does an electric tankless water heater work?
When you open a hot water faucet, cold water flows through the tankless unit. Inside, powerful electric heating elements instantly heat the water to your desired temperature. The flow rate and temperature are typically controlled by a thermostat and a flow sensor, ensuring you receive the exact amount of hot water you need, at the temperature you set.
The key to their efficiency lies in this direct heating mechanism. There’s no wasted energy keeping water hot in a tank, and no risk of running out of hot water because the unit can heat water continuously as long as there’s a water supply and electrical power. This makes them ideal for households with high hot water demand.
What are the benefits of choosing an electric tankless water heater?
One of the primary benefits is the endless supply of hot water. You won’t experience the common issue of running out of hot water during peak usage times, such as when multiple people are showering or doing laundry simultaneously. This is a significant advantage over traditional tank water heaters, which have a finite capacity.
Furthermore, electric tankless water heaters are generally more energy-efficient than their tank counterparts. By only heating water when it’s needed, they eliminate standby energy losses associated with maintaining a large tank of hot water. This translates into lower energy bills and a more sustainable approach to water heating.
Are there any downsides to electric tankless water heaters?
A potential drawback for electric tankless water heaters is the significant electrical demand they require. Heating water requires a substantial amount of electricity, so your home’s electrical panel and wiring may need to be upgraded to accommodate the unit’s power needs. This can be an added installation cost that should be factored into your decision.
Another consideration is the flow rate. While they provide endless hot water, the volume of hot water they can produce per minute is limited by their power output. In larger homes or during periods of very high demand, you might need multiple units or a higher-capacity model to ensure all appliances and fixtures receive adequately hot water simultaneously.
How do I choose the right size electric tankless water heater for my home?
Sizing an electric tankless water heater is crucial and depends on two main factors: the desired flow rate (gallons per minute or GPM) and the temperature rise required. The flow rate is determined by the maximum number of hot water fixtures you expect to use at the same time. For instance, if you have two showers running simultaneously and a dishwasher, you’ll need a unit that can provide the combined GPM of those appliances.
The temperature rise is the difference between the incoming cold water temperature and your desired hot water output temperature. This varies by geographic location, with colder climates requiring a higher temperature rise. You can find information on average incoming water temperatures in your region to calculate the necessary temperature rise for your chosen hot water output.
What is the typical lifespan of an electric tankless water heater?
Electric tankless water heaters are built to last, generally offering a longer lifespan than traditional tank water heaters. With proper maintenance and care, most units can last between 15 to 20 years, and sometimes even longer. This extended durability is due to their robust construction and the absence of a tank, which is often the first component to fail in conventional water heaters due to corrosion.
The absence of a tank also means fewer potential points of failure. There’s no risk of leaks from a corroded tank or sediment buildup that can reduce efficiency and lifespan. Regular descaling and checking the heating elements can further contribute to their longevity and optimal performance.
What kind of maintenance is required for an electric tankless water heater?
The primary maintenance task for an electric tankless water heater is periodic descaling. Over time, mineral deposits from the water can build up on the heating elements, reducing efficiency and potentially causing damage. The frequency of descaling depends on the hardness of your water; softer water requires less frequent descaling than hard water.
It’s also advisable to inspect the unit periodically for any visible signs of wear or damage, such as leaks or corrosion. Ensure that the air intake and exhaust vents (if applicable to your model) are clear of obstructions to maintain proper airflow and prevent overheating. Following the manufacturer’s specific maintenance recommendations outlined in the user manual is the best way to ensure your tankless water heater operates efficiently and reliably for years to come.
Conclusion
Choosing the right whole-home electric tankless water heater is a pivotal decision for any homeowner seeking to optimize energy efficiency, enjoy an endless supply of hot water, and reduce their environmental footprint. Our comprehensive reviews and buying guide have illuminated the top contenders in this rapidly advancing market, highlighting models that excel in performance, durability, and user satisfaction. By understanding your household’s specific hot water demands and prioritizing key features such as flow rate, energy factor, and advanced controls, you can confidently select a unit that delivers exceptional value and long-term savings.
Ultimately, investing in one of the best whole home electric tankless water heaters is an investment in your comfort and your home’s future. Embrace the advantages of on-demand hot water, precise temperature control, and a more sustainable energy solution. Empower yourself with knowledge and make an informed choice that will provide reliable, efficient hot water for years to come, transforming your daily routines and contributing to a greener household.