Best Whole House Tankless Water Heater (2024 Update)
If you're looking for an efficient and cost-effective way to heat the water throughout your entire house, a whole house tankless water heater is a great option. Unlike traditional tank water heaters that keep a large amount of water hot at all times, tankless water heaters heat the water on demand, which can save you money on energy bills and provide hot water when you need it. But with so many options available, how do you choose the best whole house tankless water heater for your home?
Before making a purchase, there are a few factors to consider. First, you'll need to determine the size of the unit based on the number of people in your household and the number of appliances that use hot water. You'll also need to consider the fuel source and the unit's energy efficiency rating. Additionally, you'll want to think about the installation process and any additional features, such as remote controls or the ability to connect to a mobile app.
If you're in the market for a whole house tankless water heater, you may be wondering which one is the best option for you. Do you prioritize energy efficiency or ease of installation? Are you looking for a unit with additional features or a basic model that does the job? As you begin your search, ask yourself questions like these to help narrow down your options and find the right whole house tankless water heater for your specific needs.
10 Best Whole House Tankless Water Heater
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This product is ideal for providing instant hot water to multiple areas in a home, including showers, sinks, and bathtubs.
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It is ideal for heating water in larger homes or buildings with natural gas as the fuel source.
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Ideal for providing hot water on demand in a home or business with high hot water demand.
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This product is ideal for providing hot water at the point of use with its compact design and digital temperature control.
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Ideal for providing hot water in a whole house without the need for a storage tank.
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This electric tankless water heater is designed to provide hot water for an entire home with digital temperature control.
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The product is ideal for providing instant hot water indoors with a high flow rate and powerful BTU rating.
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Ideal for providing instant hot water on demand for a single point of use, with self-modulation technology for energy efficiency.
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Ideal for providing hot water to a whole house indoors using natural gas with a tankless system.
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Ideal for providing hot water to an entire house using natural gas and a digital display for easy temperature control.
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1. Instant Heat Whole House Electric Water Heater
Introducing BIS09, a premium electric tankless water heater that is specifically designed for maximum comfort during bathing. With its 9KW high-power heating system, BIS09 provides continuous hot water flow, ensuring that you never experience a cold shower.
This hot water heater is equipped with a smart inverter that calculates the minimum required power based on the water flow and temperature, which saves up to 70% on energy costs. The water flow rate and temperature are stable under the chip's control, ensuring that you enjoy a steady and comfortable shower.
BIS09 comes with multiple safety protection functions that protect you from scalding, leakage, and other injuries. The premium tempered glass shell is corrosion resistant, high-grade, and easy to wipe, ensuring that the heater remains durable and long-lasting. It is ideal for use in the kitchen, bathroom, bar, school, hospital, community, and hair salon.
The electric tankless water heater is easy to use, thanks to its digital display and touch control panel. All accessories, including the shower head, water valve, and pipes, are included for quick installation without additional expenses or preparation time.
BIS09 is compact and point-of-use, allowing for installation in any direction, whether mounted horizontally, vertically, or obliquely. It measures 11″L x2″W x18.8″H and weighs 8.8lbs. It has a 1/2″NPT NPT and a voltage range of 220-240 volts.
With a one-year warranty and 24-hour customer service support, you can trust BIS09 for all your hot water needs. Don't settle for cold showers anymore; invest in BIS09 for a comfortable and uninterrupted hot water experience.
2. Gas Excelpro Tankless Water Heater With Free Flue Kit.
The Excel On Demand Hot Water Tankless Natural Gas Water Heater is the perfect solution for those who seek an instant and comfortable shower without having to wait. With its 170,000 BTU, this water heater is designed to heat water instantly, saving you valuable time, energy, and water.
The Excel Tankless Natural Gas Water Heater is CSA certified in both the United States and Canada, ensuring that it meets all safety standards. It features multi safety protections, including Overheat Protection, Flame Failure Protection, Low Water Flow Protection, High Water Pressure Protection, Dry Combustion Production, and Anti-freeze Protection. These features make it a reliable and safe appliance to use in your home.
The compact design of the Excel Tankless Natural Gas Water Heater is only the size of a small suitcase, and its wall-mount design frees up valuable floor space. The burner is manufactured using the latest European technology, which makes it highly efficient and energy-saving. The Heat Exchanger is made of oxygen-free copper, which is highly efficient and durable. It heats water only when you need it, which saves on energy costs.
The Excel Tankless Natural Gas Water Heater is easy to install or replace. It uses standard 3/4" NPT water fittings and 3" Vent Pipe for convenient and quick installation. Plus, it is compatible with standard gas pipes, making it easier to replace a traditional tank. The advanced venting technology enables more location options, such as the kitchen, garage, basement, or attic.
3. Envo Atami 24 Kw 4.5 Gpm Tankless Electric Water Heater
Introducing a powerful and efficient water heater that is perfect for any home. This unit requires 3 x 40 amp double pole breakers and needs 24000 watts of power at 240v to operate. With the ability to supply hot water to the kitchen faucet, bathroom faucet, and shower, this water heater offers convenience and versatility.
One of the key benefits of this water heater is its energy-saving design. It only heats water when you need it, eliminating the need for preheating and standby heat loss. This not only saves energy but also reduces your utility bills. Additionally, its compact design allows it to fit in tight spaces like cabinets and closets, making it ideal for small homes or apartments.
Another advantage of this water heater is its longer lifespan compared to conventional tank units. This is due to the absence of limescale build-up, which can cause damage to traditional tank units. The automatic memory function of this unit is also a great feature. It remembers your preferred settings from the last use, making it faster and more convenient to use.
Furthermore, this water heater is ETL certified and listed, ensuring its quality and safety. It has a power rating of 24KW, operates at 240V and 60Hz, and requires 3x40amp breakers. The over-temperature protection feature of this unit ensures that the water does not get too hot and automatically cools it down to a safe level.
Last but not least, this water heater has a water/electric separation feature. This means that the flowing water and the electrical system are isolated from each other, ensuring maximum safety for you and your family.
4. Efficient Ge Tankless Water Heater For Anywhere-Use
Looking for an efficient and reliable solution for hot water in your home? Look no further than this tankless electric water heater. With its instant, continuous water flow, you'll never run out of hot water again.
This whole home solution provides enough hot water for a house or apartment, making it the perfect choice for families or individuals. With a performance of up to 5.4 gallons per minute, you can run 1 faucet and 3 showers simultaneously in warm climates. (*Results are based on 72˚F inlet water temperature and 105˚F outlet water temperature)
The intuitive interface and space-saving design make it easy to adjust the temperature and settings with the easy-to-use touch screen. Plus, this compact unit takes up significantly less space than a tank-style water heater, making it a great option for those with limited space.
This tankless electric water heater is also energy efficient, conserving energy and water by only using energy when hot water is in use. This helps you save money on your energy bills while also reducing your environmental impact.
Don't settle for less than the best when it comes to hot water in your home. Choose this tankless electric water heater for reliable, efficient, and convenient hot water on demand.
5. Titan Tankless N-210 Whole House Water Heater System
Looking for a reliable and efficient hot water solution? Look no further than this product! This advanced system is designed to provide endless hot water for your entire home, ensuring that you never run out of hot water no matter how many people are showering or using appliances at the same time.
With its cutting-edge technology, this product is also incredibly energy-efficient, helping you save up to 50% on your hot water bill. That means you can enjoy all the hot water you need without worrying about high utility costs.
But that's not all. This product also comes with a range of convenient features and options, including customizable temperature settings, easy-to-use controls, and a compact, space-saving design that fits seamlessly into any home.
So if you want to enjoy endless hot water and save money on your energy bills, this product is the perfect choice. With its advanced features, reliable performance, and energy-efficient design, it's the ultimate hot water solution for any home.
6. Ge 18 Kw Tankless Water Heater – Diamond Gray
Looking for a water heater that can provide you with unlimited hot water on demand? Look no further than this tankless electric water heater! With instant, continuous water flow, you'll never have to worry about running out of hot water again.
This whole home solution is perfect for houses or apartments, easily providing enough hot water for all your needs. With a performance of up to 3.8 gallons per minute (GPM), you can even run one faucet and two showers simultaneously in warm climates (*Results are based on 72˚F inlet water temperature and 105˚F outlet water temperature).
The intuitive interface and space-saving design make this water heater a breeze to use. You can easily adjust the temperature and settings with the easy-to-use touch screen, all while enjoying a compact unit that takes up significantly less space than a tank-style water heater.
Not only is this water heater convenient and space-saving, it's also energy-efficient. It conserves energy and water by only using energy when hot water is in use, saving you money on your energy bills in the long run.
7. Instagas 145: On-Demand Hot Water Heater
For those in need of a reliable and efficient water heating solution, the FOGATTI tankless water heater is highly recommended. It is important to note that installation should be done in accordance with local building and plumbing codes by a licensed professional to ensure proper and safe operation.
One of the benefits of the tankless design is the elimination of the need for preheating, allowing for immediate hot water use. This model boasts a high heating capacity of 145,000 BTU and a maximum flow rate of 6.3 gallons per minute, making it suitable for 2-3 outlet points. With a UEF over 0.81, this model has a high energy conversion rate, reducing energy loss and saving money on utility bills.
This water heater is CSA certified in both the United States and Canada, demonstrating its excellent quality and safety. The FOGATTI tankless water heater utilizes advanced technology for superior performance and durability. The built-in forced exhaust fan at the bottom ensures stable combustion and eliminates the impact of external wind. Its compact design also makes for easy installation.
FOGATTI offers a 30-day free replacement policy and a 5-year warranty on the heat exchanger, as well as a 2-year warranty on all other parts. Please note that any labor costs incurred after 30 days are not covered under the warranty.
8. Sivuatek Smart Tankless Water Heater – 18kw!
The V7B-180 electric tankless water heater is a compact and efficient solution for providing endless hot water. With a powerful 18kW heating system, it can deliver up to 2.8 gallons per minute of hot water at a temperature higher than 120℉ in seconds. This makes it perfect for installing a few feet away from a shower tub or washing machine to ensure a comfortable and uninterrupted hot water supply.
One of the key benefits of the V7B-180 is its smart design. Unlike traditional tank water heaters that waste energy by preheating the water, this instant water heater adjusts its power input based on the real-time flow rate and temperature settings. This results in a consistent and comfortable experience, optimal energy efficiency of 99.8%, and savings of up to 50% on water heating costs.
Safety is a top priority with the V7B-180. It has been newly designed with multiple protection devices, including leakage protection, dry heating protection, high-temperature protection, and auto-stop. Every unit undergoes strict testing to ensure 100% safety, and it is ETL listed, making it suitable for use in residential, restaurant, school, hospital, office, and other public facilities.
The electric tankless water heater V7B-180 has a unique design that includes a specially designed heating chamber with separated water and electricity lines. This eliminates the risk of leakage, inner corrosion, and scale deposit, ensuring outstanding performance for years to come with minimal maintenance.
As a point of use water heater, the V7B-180 is a space-saving and energy-efficient option that avoids water and energy waste. It comes with standard 3/4" NPT pipe fittings and requires a 240V supply via two pieces of “40A Double Pole Circuit Breaker” and two sets of “8AWG/2 wires with Grounding”. It is important to confirm that your circuit breaker panel meets these requirements before installation.
9. Camplux Natural Gas Tankless Water Heater.
The gas water heater being reviewed is an energy and space-efficient appliance that conserves energy by heating only when necessary. It boasts a space-saving design that ensures that it takes up minimal space in your home. The on-demand water heater is designed to provide optimal water pressure, with a high-performance rate of up to 5.28 gallons per minute (GPM) for a powerful, constant stream of hot water throughout your entire home.
Installation of this 120-volt tankless water heater is convenient and easy, making it an excellent choice for those who prefer to DIY. The Camplux customized vent pipe CP-70 is recommended for indoor installation to ensure better ventilation performance. This tankless water heater is perfect for homeowners who want a hassle-free installation process.
The gas hot water heater comes with a CSA-certified balanced combustion design, a v-type stainless steel burner, and high heating efficiency of up to 89.98%. These features ensure that the appliance heats water quickly, efficiently, and safely. With a high thermal efficiency rating, this gas water heater is an excellent choice for homeowners who want to save on energy costs while enjoying hot water on demand.
The electric hot water heater has a 90-degree wind isolation design that ensures high-rise wind resistance. This tankless instant water heater can withstand backflow wind in high floors, making it a great option for those who live in apartments and high-rise buildings.
10. Silver Natural Gas Tankless Water Heater: Whole House Solution
Looking for a reliable and efficient outdoor shower that can deliver a perfect hot water experience? Look no further than this amazing product.
With a maximum output of 4.2 gallons per minute and an output water temperature of 115°F, this outdoor shower is designed to provide you with the perfect shower experience every time. It is rated at a maximum output of 105,800 BTUs, which means you can enjoy endless hot water without any interruptions.
One of the best things about this outdoor shower is that it does not require any electricity to operate. It ignites with just 2 D cell batteries, making it perfect for off-the-grid areas, campsites, cabins, or any other location where electricity is not available.
The unit also comes equipped with a digital display that makes it easy to adjust the water and gas flow to your desired output temperature. This way, you can customize your shower experience to meet your specific needs and preferences.
In addition to its powerful and efficient performance, this outdoor shower is also incredibly portable. It comes with a convenient carrying handle, making it easy to take with you wherever you go. So whether you're camping in the woods or spending a day at the beach, you can enjoy a refreshing and invigorating shower wherever you are.
Best Whole House Tankless Water Heater FAQs
Can a whole house tankless water heater provide enough hot water for multiple showers and appliances simultaneously?
Yes, a whole house tankless water heater can provide enough hot water for multiple showers and appliances simultaneously. Tankless water heaters are designed to heat water on demand, which means they don't store hot water in a tank like traditional water heaters. Instead, they heat water as it flows through the unit, providing a continuous supply of hot water.
The size of the tankless water heater you choose will depend on the size of your home and the number of hot water appliances you have. A larger unit can provide more hot water, allowing you to run multiple showers or appliances at the same time.
It's important to note that while tankless water heaters can provide a continuous supply of hot water, they have a limited flow rate. This means that if you're running too many hot water appliances at once, you may experience a drop in water pressure or temperature.
Overall, a properly sized whole house tankless water heater can provide enough hot water for multiple showers and appliances simultaneously, making it a convenient and energy-efficient option for many homeowners.
How do whole house tankless water heaters compare to traditional tank water heaters?
Whole house tankless water heaters are becoming increasingly popular due to their energy efficiency and convenience. Unlike traditional tank water heaters, tankless water heaters heat the water on demand rather than storing it in a tank. This means that they don't have to constantly heat and reheat the same water, which can result in significant energy savings.
Additionally, tankless water heaters take up less space than traditional tank water heaters, making them ideal for smaller homes. They also have a longer lifespan, typically lasting up to 20 years, compared to the 10-15 year lifespan of traditional tank water heaters.
However, whole house tankless water heaters come with a higher upfront cost than traditional tank water heaters, and may require additional installation costs, such as upgrading electrical or gas lines. Additionally, they may not be able to provide hot water to multiple outlets at the same time, depending on the size of the unit and the water demand in the home.
Overall, while whole house tankless water heaters have their advantages, it's important to carefully consider your home's specific needs and usage before deciding which type of water heater is right for you.
How long do whole house tankless water heaters last?
Whole house tankless water heaters are known to last longer than traditional tank water heaters. On average, a tankless water heater can last anywhere from 15 to 20 years with proper maintenance and usage. However, the lifespan of a tankless water heater can vary depending on factors such as the quality of the unit, the frequency of use, and the quality of installation.
It is important to note that regular maintenance is crucial to ensuring the longevity of a tankless water heater. This includes flushing the system to remove any mineral buildup and checking for any leaks or malfunctions. It is also recommended to have a professional plumber perform routine maintenance and inspections.
While the initial cost of a tankless water heater may be higher than a traditional tank water heater, the longer lifespan and energy efficiency can ultimately result in cost savings over time.
How much does a whole house tankless water heater cost?
The cost of a whole house tankless water heater can vary depending on several factors such as the size, brand, and installation requirements. Generally, the cost range for a whole house tankless water heater can be between $500 to $4,500, with an average cost of around $1,500 to $2,500. The smaller units with lower flow rates and less power will fall towards the lower end of this range, while the higher-end models with more power and features will be towards the higher end.
When considering the cost of a whole house tankless water heater, it is important to keep in mind the long-term savings that can be achieved through improved energy efficiency and lower utility bills. While the upfront cost of a tankless water heater may be higher compared to a traditional tank-style water heater, the energy savings over time can make up for the initial investment.
It is recommended to consult with a professional plumber or HVAC technician to determine the best size and type of tankless water heater for your home and to get an accurate cost estimate for installation.
How much energy can I save with a whole house tankless water heater?
A whole house tankless water heater can save a significant amount of energy compared to a traditional tank water heater. According to the U.S. Department of Energy, tankless water heaters are generally more energy-efficient than tank water heaters, as they only heat water on demand rather than continuously maintaining a tank full of hot water.
The amount of energy you can save with a whole house tankless water heater depends on a variety of factors, such as the size of your home, the number of people living in it, and your hot water usage habits. However, on average, tankless water heaters can save you anywhere from 24% to 34% on your energy bill.
Additionally, tankless water heaters have a longer lifespan than traditional tank water heaters, which means you won't have to replace them as often. This can also save you money in the long run.
Overall, a whole house tankless water heater can provide significant energy savings and is a great investment for homeowners looking to reduce their energy consumption and lower their utility bills.
What are the advantages of using a whole house tankless water heater?
A whole house tankless water heater offers several advantages over traditional tank-style water heaters. Firstly, tankless water heaters are more energy efficient as they only heat water when it is needed, unlike tank-style heaters that constantly heat and reheat water even when it is not being used. This can lead to significant savings on energy bills.
Secondly, tankless water heaters are more compact and take up less space than traditional water heaters. This means they can be installed in smaller spaces, freeing up valuable storage space in homes.
Thirdly, tankless water heaters provide an endless supply of hot water, eliminating the need to wait for a tank to refill and heat up. This is particularly useful for larger households where multiple people need hot water at the same time.
Lastly, tankless water heaters have a longer lifespan than traditional water heaters, which typically last 10-15 years. Tankless water heaters can last up to 20 years with proper maintenance, making them a more cost-effective long-term solution.
What are the installation requirements for a whole house tankless water heater?
Installing a whole house tankless water heater requires a few specific requirements to ensure that it operates efficiently and effectively. Firstly, it is important to ensure that the unit is sized appropriately for the home's hot water demands. This can be determined by calculating the peak hot water demand in gallons per minute (GPM) and selecting a unit that can meet or exceed that demand.
Next, the unit must be installed in a well-ventilated area with adequate clearance for servicing and maintenance. The installation location should also provide easy access to gas and water lines, as well as electrical connections if applicable.
The gas line must be properly sized and have a sufficient supply of gas to meet the unit's requirements. The water line should also be appropriately sized to ensure proper flow and pressure.
Finally, it is recommended to have a licensed plumber and electrician install the unit to ensure that all local codes and regulations are followed. Regular maintenance and servicing of the unit are also important to ensure optimal performance and longevity.
What are the top-rated whole house tankless water heaters on the market?
There are several top-rated whole house tankless water heaters available on the market, but some of the most popular and highly rated models include the Rheem Performance Platinum 9.5 GPM Natural Gas High Efficiency Indoor Tankless Water Heater, the Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, and the Takagi T-H3-DV-N Condensing High-Efficiency Natural Gas Indoor Tankless Water Heater.
Each of these models boasts impressive features such as high efficiency ratings, advanced control systems, and durable construction. The Rheem Performance Platinum model, for example, has a 0.93 UEF rating and can provide up to 9.5 gallons of hot water per minute, making it an ideal choice for larger households with high hot water demands. The Rinnai RUC98iN is another popular choice, with a 0.96 UEF rating and a user-friendly digital controller that allows for precise temperature control. Finally, the Takagi T-H3-DV-N offers an impressive 10 gallons per minute flow rate, making it a great option for large families or homes with multiple bathrooms.
Ultimately, the best whole house tankless water heater for you will depend on your specific needs and preferences, but these top-rated models are a great place to start your search.
What is the best brand of whole house tankless water heater?
When it comes to whole house tankless water heaters, several brands stand out in terms of quality and efficiency. One of the leading brands in this category is Rinnai. This Japanese company has been producing tankless water heaters for over 100 years and has earned a reputation for producing high-quality and reliable products.
Another popular brand for whole house tankless water heaters is Navien. Navien is a South Korean company that has been in the business for over 40 years. Their tankless water heaters are known for their energy efficiency, durability, and ease of use.
A third brand that is worth considering is Rheem. This American company has been producing heating and cooling products for over 90 years and has a wide range of tankless water heaters to choose from. Their products are known for their reliability and energy efficiency.
Ultimately, the best brand of whole house tankless water heater depends on your specific needs and budget. It's important to research each brand and their products thoroughly to determine which one is right for you.
What size whole house tankless water heater do I need for my home?
The size of the whole house tankless water heater you need for your home will depend on several factors such as the number of people in your household, your hot water usage habits, and the climate in your area. As a general rule of thumb, a small tankless water heater with a flow rate of 3-4 gallons per minute (GPM) is ideal for a household with 1-2 people. For a family of 3-4 people, a medium-sized unit with a flow rate of 5-6 GPM should suffice. Larger households with 5 or more people will require a larger tankless water heater with a flow rate of 7-10 GPM.
It's important to note that hot water usage habits can also impact the size of the tankless water heater you need. For example, if you have multiple people taking showers at the same time or if you frequently run the dishwasher and washing machine simultaneously, you may need a larger unit to meet your hot water demands. It's best to consult with a professional plumber to determine the right size tankless water heater for your specific needs.
