Best Tankless Water Heater Brands (2024 Update)
If you’re looking for a more efficient way to heat water at home, a tankless water heater is a great option. These units are more energy-efficient than traditional water heaters, and they also provide an endless supply of hot water. However, with so many brands and models available, it can be difficult to choose the right one. Here are some factors you need to consider before making a decision:
1. Flow rate: determine how much hot water you need at peak usage times to find the appropriate flow rate for your household.
2. Size: make sure the unit fits in the space allocated for it, and consider the hot water needs of your household when deciding on the appropriate size.
3. Energy efficiency: look for an energy-efficient model to save money on your utility bill and reduce your carbon footprint.
To help you make an informed decision, here are some questions to ask when considering various tankless water heater brands:
1. What's the warranty on the unit and how long does it last?
2. Does the brand have a good reputation for durability and longevity?
3. What are the reviews saying about the brand and the specific model you’re interested in?
4. What's the price range for the different models available, and does the price correlate with features?
5. Are there any additional features such as digital displays, Wi-Fi connectivity, and safety features like automatic shutoff or leak detection?
By factoring in these considerations and asking the right questions, you can find the best tankless water heater brand for your needs.
10 Best Tankless Water Heater Brands
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Ideal for indoor use in small households, providing on-demand hot water with high efficiency and digital display.
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This electric tankless water heater is ideal for providing hot water on demand in small spaces.
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Ideal for outdoor use as a portable gas water heater with overheating protection; easy to install.
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Ideal for providing endless on-demand hot water for two showers, while being energy efficient and small enough to install anywhere.
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The product is ideal for providing instant hot water to a sink or other small area in a cost-effective and energy-efficient manner.
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This product is ideal for providing hot water on demand for whole house use with its self-modulation feature.
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This product is ideal for residential indoor use, providing on-demand hot water for small homes and apartments using propane gas.
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It is ideal for providing hot water on demand in homes and commercial buildings, while saving space and energy.
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The product is ideal for providing on-demand hot water to a household or commercial property with electrical outlets.
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Ideal for providing hot water on demand in homes and businesses, with energy efficiency and space-saving benefits.
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1. Camplux Natural Gas Tankless Water Heater.
The Camplux 3.18 GPM tankless water heater natural gas is a reliable and efficient option for those in need of endless hot water. This unit delivers 3.18 gallons per minute of on-demand hot water, making it perfect for 2-3 people in a whole house. What sets this heater apart is its activation method – it is activated by water flow rather than water pressure, which ensures a constant flow of hot water with a minimum activation water capacity rate of 0.65 GPM and a maximum input rating of 82,000 BTUs.
Installation is made easy with the standard 1/2" BSP water fitting and gas inlet. The package includes a 1/2" BSP female to 1/2" NPT male gas connector adapter, allowing for direct connection to a natural gas pipe. The heater also comes with a 2.3" horizontal vent pipe for efficient power ventilation, and for indoor use, the Camplux customized wall thimble-WT236 is recommended.
The Camplux tankless gas water heater boasts a modern and trendy design with a unique white glassy front panel. It also features an LED touchscreen for easy control of water temperature, with Fahrenheit and Celsius switch options. The compact size of the unit saves space in comparison to traditional tanks.
The Camplux heater is equipped with outstanding features such as an oxygen-free copper heat exchanger and v-type stainless steel burner, which provides high heating efficiency up to 89.98%. Its 90° wind isolation design makes it anti-backflow wind in high floors, while the S/S 2.36" vent pipe exhausts harmful gases quickly.
Safety is always a top priority, which is why the Camplux tankless gas water heater has 6-in-1 protection. It includes dry combustion, flame failure device, anti-freezing protection, and over-heating protection to ensure your safety. The fully automatic temperature controls also have an energy-saving mode and child lock technology.
It is important to note that the standby electric power is 2W, and the working electric power is 42W. The natural gas input pressure is 0.25 psi, and a pressure relief valve is located at the water inlet of the heater. It is necessary to manually unscrew the pressure relief valve to drain the water inside the machine after use to avoid freezing and potential damage during temperatures lower than 32°F in winter.
2. Bosch Tronic 3000: Compact Tankless Water Heater.
Introducing the latest innovation in water heating technology, the new low activation flow rate electric tankless water heater. This powerful 4.5 kW under-sink unit is designed to provide an endless supply of instantaneous hot water to one or more sinks, making it ideal for light commercial applications such as shopping malls, airports, stadiums, and offices.
One of the standout features of this tankless water heater is its new low activation flow rate of only 0.4 GPM. This allows for use with newer, low flow faucets, ensuring that you can get hot water whenever you need it, without wasting water or energy.
The unit's ultra-compact and lightweight design, measuring only 6.6" x 12.8" x 2.9", makes it perfect for tight under-counter spaces where traditional water heaters just won't fit. Plus, with its 360-degree orientation, you can position the unit in any way you need to ensure worry-free, flexible installation. Please note that due to the amperage requirement, this item will need to be hard-wired.
This electric tankless water heater is also incredibly efficient, with a 98% efficiency rating and no standby heat loss. This means that you can enjoy hot water on demand without worrying about wasting energy or money. Additionally, it does not require a temperature or pressure relief valve, saving you even more on installation and maintenance costs.
3. Gooble Propane Portable Water Heater – Instant Heat!
Introducing a Super Quality Tankless Water Heater that ensures safety and energy efficiency for your family. This gas water heater features overheating and flameout protection, as well as anti-freezing apparatus which drains the stock water to prevent freezing damage under cold conditions. The gas supply will shut off automatically in case of unexpected flameout or high water temperature over 167 °F, ensuring your family's safety at all times.
Moreover, this outdoor water heater adopts a compact and lightweight structure design with advanced combustion technology that decreases gas consumption and burning noise. With a maximum power output of 41,000BTU/Hr, you can enjoy instant and endless hot water easily, wherever you are, without the need for preheating. This makes it an energy-saving option that will help you save on your gas bills.
Installing this tankless water heater is easy, as it comes equipped with BSP pipe fittings and all necessary accessories. There are three interface ports under the propane water heater, with the intake port on the left, the shower port in the middle, and the water inlet on the right. This convenient design allows for easy installation, but always remember to check for gas leakage before operation to avoid any mishaps.
This gas water heater is mainly used for outdoor showering with hot water, providing a safe and comfortable hot shower at any time and anywhere. Its compact and space-saving design makes it portable for the outdoors, making it perfect for camping, hiking, fishing, beaching, and other outdoor activities. Additionally, you can also use it to wash your pets.
When it comes to safety, this liquid propane tankless water heater is equipped with a detachable drain valve, automatic cut-off function, and automatic ignition. Inside, it also features automatic water cut-off control, dry combustion protection, and over-pressure protection, making it very safe and reliable for use.
4. Evening Tide 18kw Tankless Water Heater: Instant Hot Water
The Airthereal Electric Tankless Water Heater is the perfect solution for individuals seeking a constant supply of hot water without the hassle of traditional hot water heaters with tanks. With this innovative water heater, you can enjoy endless hot water on demand, without preheating or experiencing any temperature fluctuations.
This wall-mounted water heater is designed to save space, taking up only 10% of the space that traditional hot water heaters with tanks typically require. Its compact size makes it an ideal fit for small apartments, condos, and homes with limited space.
Not only does the Airthereal Electric Tankless Water Heater save space, but it also saves energy. Unlike traditional tank water heaters that store heated water, this water heater only heats water when you need it. Its self-modulating temperature technology ensures that energy is only used to heat water while you are using it, resulting in up to a 50% reduction in water heating costs compared to traditional tank water heaters.
Before purchasing and installing this water heater, it is important to note that it requires 240 voltage, 2 x 40 AMP circuit breaker size, and a set of 2 x (8AWG/2) wires. Therefore, it is essential to ensure that your breaker panel meets these specifications to avoid any installation issues.
Safety is a top priority when it comes to the Airthereal Electric Tankless Water Heater. It features high-temperature protection, dry heating protection, and electrical leakage protection to ensure safe usage. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion, providing peace of mind for users.
5. Ecoinstant Electric Water Heater – 240v, 5.5kw
The on-demand electric water heater is a perfect solution for anyone looking for instant and consistent hot water. With a 5.5KW heating system, it supplies endless hot water of 116℉ or higher temperature shortly, without any waiting for preheat or temperature fluctuations. This feature makes it an ideal companion for sinks and helps to get rid of those lukewarm toys that fail to deliver the desired temperature.
The electric hot water heater ECO55 is equipped with a smart self-adjustment system that adjusts power input based on flow rate and temperature setting in real-time. This means that the unit applies less power when the water flow is reduced, ensuring that you still get your ideal temperature without the risk of scalding hot water. This feature also optimizes energy efficiency, with an impressive 98% saving on your electric charge.
The tankless water heater electric comes with a digital display and touch control panel, making it easy to set the temperature. You don't need to go through the hard lesson of understanding the working status of the 240v water heater tankless. All you need to do is turn on the tap and let the smart unit do the rest, so you can enjoy instant hot water.
Safety and durability are essential features of this electric hot water heater. Every unit has newly updated multiple protection devices and goes through strict tests to ensure 100% safety. The inner water and electricity lines are specially designed to run separately, avoiding any potential leakage or harm of scale build-up. It is also approved by ETL and qualifies for UL, assuring you of its outstanding performance for years to come.
The sleek tankless water heater is compact, measuring 11" x 7.5" x 2.35" and can be installed anywhere close to an outlet, avoiding any energy waste. It can be mounted horizontally, vertically, or obliquely, making it ideal for use in the kitchen, bar, school, hospital, community, and hair salon. However, please verify that it is the right size for your needs, with parameters of 5.5kW@240V and pipe fittings of 1/2" NPT.
6. Ecotouch Instant Heater For Whole House
The ECO180B tankless hot water heater electric is a powerful and efficient option that provides instant hot water of 120℉ or higher in seconds. With an 18kW smart heating system, this water heater can supply sufficient hot water for the entire house, including shower, sink faucets, dishwasher, washing machine, and more. This means no more waiting for preheating or worrying about running out of hot water during a shower.
One of the key features of the ECO180B is its self-modulating instant water heater technology. This means the water heater adjusts the power input based on the current flow rate and temperature setting. For example, if you reduce the water flow, the heater will consume less power to ensure you get the ideal temperature without the risk of scalding. This technology ensures a comfortable experience and an excellent energy efficiency rate of 98%, which will save you considerable electric charges.
The digital display and touch control panel make temperature setting an easy job. The useful information displayed on the screen helps you get a full understanding of the working status of the water heater. With the ECO180B, you can turn on the faucet and let the smart instant hot water heater do the rest.
The ECO180B is also designed with safety and durability in mind. It comes with multiple protections, such as leakage protection, over-heating protection, and auto-stop. Every piece of the electric tankless water heater ECO180B goes through strict tests to ensure 100% safety, and it is listed by ETL and qualifies for UL. The inner water and electricity lines are designed to run separately to avoid leakage risk and scale build-up. You can expect outstanding performance for years to come.
The sleek design of the ECO180B makes it possible to install anywhere point of use to avoid waste, ideal for shower, kitchen, bar, school, and hair salon. The compact size of this water heater, which is as small as a shoebox, makes it easy to install. Please verify that it is the right size for your needs: 18kW at 240V(only); dimensions 12.22" (W) x 17.25" (H) x 4.02" (D); plumbing connections: 3/4" NPT. In order to install the 18kW Tankless Water Heater, it would require 240V, 2X40AMP Double Pole Breaker, and 2X8AWG/2 wires with Grounding.
7. Propane Tankless Water Heater For Small Spaces
The Camplux tankless water heater is a modern and trendy solution for those seeking to save space and energy. Its compact size of 12.8"(L)*5.91"(W)*20.28"(H) is significantly smaller than traditional tanks, making it ideal for small homes, cabins or apartments. Plus, its eco and full gas switch allows for energy-saving and ideal hot water temperature.
This on-demand water heater delivers 2.64 gallons per minute of endless hot water, ensuring instant and constant hot water for your needs. It's designed with safety in mind, featuring flame-out protection, anti-freezing protection (manual drainage required), over-heating protection, and air flow pressure switch protection. The electronic ignition system is also safe and plugs into a standard 120V electrical outlet with a UL-listed cord.
Installation of the propane water heater is easy with standard 1/2" NPT water fitting and gas inlet. It comes with a 2" horizontal vent pipe, ensuring efficient power ventilation. The minimum activation rate is 0.65 GPM, and the maximum input rating is 68,000 BTU. The water connection location/size is at the bottom with a 0.5-inch NPT. To connect this water heater to a propane tank, you will need a gas regulator (Camplux model KR-106A) and a 1 pc 5/8" NPT male to 1/2" BSP female gas connector adapter.
At Camplux, customer service is a top priority. Their team offers 24-hour customer service through live chat, phone support, and their online helpdesk. If you have any questions or concerns, their team is always ready to assist you. To reach them, simply call (844) 538-7475.
8. Rheem 18kw 240v Tankless Electric Water Heater
Introducing an external digital thermostatic control with LED display, designed with precision and advanced technology to provide an accurate temperature control system for your water heating needs. With a remarkable (+/-) 1 degree accuracy, this device ensures that you have the perfect temperature for your hot water supply at all times.
This innovative product boasts of the most advanced self-modulation technology which enables it to adjust power to meet hot water demand. It is built to deliver optimal performance while ensuring energy efficiency, which in turn saves you money on your energy bills.
Crafted with durable copper immersion, this product features two heating elements that are field serviceable, ensuring that you enjoy long-lasting service from this device. With an impressive flow rate of up to 4.4 GPM, this product provides an adequate supply of hot water for your home or business needs.
Installation is a breeze with this product as it features bottom 3/4 inch NPT water connections that make it easy to connect to your existing water supply system. The device is also threaded for easy replacement, which ensures that you can replace it with ease whenever the need arises.
One striking feature of this product is its digital temperature display, which makes it easy to monitor the temperature of your hot water supply. This device is designed to provide accurate temperature readings, which gives you peace of mind knowing that you always have the right temperature for your hot water needs.
9. Rheem 8kw 240v Tankless Electric Water Heater
The water heater boasts an easy-to-use ON/OFF dial control, allowing for quick access and adjustment of the device's settings. The adjustable digital temperature display provides an accurate and precise reading of the current water temperature, giving users the ability to customize the device to their specific needs.
With its innovative self-modulating power control, this water heater allows for optimal energy efficiency and cost savings. By adjusting the power output based on the water demand, the device only uses the necessary amount of energy to heat the water, resulting in a more sustainable and eco-friendly heating solution.
The 8kW model has an impressive flow rate of up to 1.95 gallons per minute, making it suitable for small to medium-sized households. The device features side 1/2" NPT water connections, providing a secure and stable connection between the water supply and the heater.
This water heater operates on demand, providing continuous hot water whenever it is needed. No more waiting for the tank to refill or worrying about running out of hot water during a shower. With this device, users can enjoy a seamless and uninterrupted supply of hot water.
Best Tankless Water Heater Brands FAQs
What are the most affordable tankless water heater brands?
When it comes to tankless water heaters, there are a number of brands that offer affordable options. One of the most popular and reliable brands is Rinnai. They offer a range of tankless water heaters that are energy efficient and affordable, making them a great choice for homeowners on a budget. Another brand to consider is Bosch, which offers a variety of tankless water heaters that are efficient and affordable. Other brands to consider include Rheem, Takagi, and Noritz, all of which offer affordable options for homeowners. When selecting a tankless water heater, it’s important to consider factors such as the size of your home, your hot water usage, and your budget. By doing so, you can choose a tankless water heater that meets your needs and fits within your budget.
What are the most energy-efficient tankless water heater brands?
There are several energy-efficient tankless water heater brands available in the market. However, some of the most popular and reliable brands are:
1. Rinnai: Rinnai is a well-known brand that offers a variety of energy-efficient tankless water heaters. Their models are designed to provide maximum energy savings, and they have a high energy factor (EF) rating, making them an excellent choice for homeowners looking to reduce their energy consumption.
2. Navien: Navien is another top-rated brand that offers a wide range of energy-efficient tankless water heaters. Their models are designed to be highly efficient, with a condensing technology that helps to reduce energy waste.
3. Rheem: Rheem is a popular brand that offers several energy-efficient tankless water heaters. Their models are designed to be highly efficient, with a high EF rating and low NOx emissions.
4. Noritz: Noritz is a reliable brand that offers a range of energy-efficient tankless water heaters. Their models are designed to be highly efficient, with a high EF rating and low NOx emissions.
When choosing an energy-efficient tankless water heater, it's essential to consider factors such as the size of your home, your hot water needs, and your budget. It's also important to choose a reputable brand with a track record of reliability and customer satisfaction.
What are the most popular tankless water heater brands among professionals and contractors?
There are several popular tankless water heater brands that are highly regarded among professionals and contractors. Some of the most popular brands include Rinnai, Navien, Takagi, and Noritz. Each of these brands has a reputation for producing high-quality, energy-efficient tankless water heaters that are durable and reliable.
Rinnai is a popular brand that offers a wide range of tankless water heaters that are known for their efficiency, reliability, and ease of use. Navien is another popular brand that produces a variety of tankless water heaters that are designed to be energy-efficient and easy to install. Takagi is a well-respected brand that offers a range of high-quality, compact tankless water heaters that are ideal for smaller homes and apartments. Noritz is another popular brand that produces a variety of tankless water heaters that are known for their durability and reliability.
Overall, choosing a tankless water heater brand will depend on your specific needs and preferences. It's important to do your research and read reviews from other professionals and homeowners to determine which brand is the best fit for your needs.
What are the most reliable tankless water heater brands for residential use?
There are several reliable tankless water heater brands for residential use. Some of the top brands include Rinnai, Navien, and Rheem. Rinnai is known for its high-quality products and advanced technology, including Wi-Fi connectivity and smart home integration. Navien is also a popular choice, with its energy-efficient and eco-friendly designs. Rheem is another trusted brand, with a range of models that offer both gas and electric options.
Other notable brands include Noritz, Takagi, and Bosch. Noritz is known for its durable and long-lasting tankless water heaters, while Takagi offers a variety of models that are both efficient and affordable. Bosch is also a reliable brand, with a range of tankless water heaters that are compact and easy to install.
When choosing a tankless water heater brand, it's important to consider factors such as efficiency, durability, and cost. It's also a good idea to read customer reviews and compare features to find the best option for your home.
What are the top-rated tankless water heater brands on the market?
There are several top-rated tankless water heater brands that are available on the market. Among them, Rinnai, Navien, and Rheem are considered to be the best due to their high-quality products and exceptional customer service.
Rinnai is a Japanese brand that has been in the market for over 100 years. They are known for their energy-efficient and reliable tankless water heaters that come with a long warranty period. Their products are designed to provide hot water on demand, making them an excellent choice for households with high hot water demand.
Navien is another popular brand that offers a range of tankless water heaters suitable for both residential and commercial use. They are known for their high-efficiency condensing technology, which helps reduce energy consumption and provides instant hot water.
Rheem is an American brand that has been in the market for over 90 years. They offer a range of tankless water heaters that are energy-efficient and come with a long warranty period. Their products are designed to provide a constant supply of hot water, making them an ideal choice for large households.
Other notable brands include Bosch, Takagi, and Noritz, which are also known for their high-quality tankless water heaters. Ultimately, the best brand for you will depend on your household's specific hot water needs and budget.
Which tankless water heater brands are best suited for larger households or commercial applications?
When it comes to tankless water heaters, there are several brands that are well-suited for larger households or commercial applications. One of the most popular brands is Rinnai, which offers a variety of models that can provide hot water for multiple bathrooms and appliances simultaneously. Their units have a high flow rate and a wide range of temperature settings, making them a great choice for larger families or businesses.
Another brand that is well-suited for larger households and commercial applications is Navien. Navien offers high-capacity units that can deliver hot water on demand and are energy-efficient, helping to reduce operating costs. They also offer a range of features, such as remote control access and built-in recirculation pumps, that make them a popular choice for commercial and large residential applications.
Other brands that are worth considering for larger households and commercial applications include Noritz, Takagi, and Rheem. Each of these brands offers high-capacity units with advanced features and energy-efficient technology that can help meet the hot water needs of larger households and businesses. Ultimately, the best tankless water heater brand for your needs will depend on factors such as your hot water usage, budget, and specific requirements.
Which tankless water heater brands are compatible with solar and other renewable energy sources?
Several tankless water heater brands are compatible with solar and other renewable energy sources. Some of the well-known brands that offer such products include Rinnai, Navien, Rheem, and Noritz.
Rinnai, for example, offers a range of tankless water heaters that can be powered by solar panels. These models are designed to work seamlessly with solar thermal systems, providing hot water on demand while reducing energy consumption and costs. Navien also offers tankless water heaters that are compatible with solar, geothermal, and other renewable energy sources.
Rheem and Noritz also have tankless water heaters that can be integrated with solar and other renewable energy systems. These brands offer a variety of models with different capacities and features to meet the needs of different households and applications.
When choosing a tankless water heater that is compatible with renewable energy sources, it's important to consider factors such as the available energy source, the size and hot water demand of your household, and the overall efficiency and performance of the unit. Consulting with a professional installer or plumber can help you select the best option for your specific needs.
Which tankless water heater brands are known for their durability and efficiency?
There are several tankless water heater brands that are known for their durability and efficiency. One of the most popular brands is Rinnai. Rinnai tankless water heaters are known for their reliability, efficiency, and long lifespan. They are also highly customizable, with a variety of models and sizes to choose from. Another popular brand is Navien. Navien tankless water heaters are known for their high efficiency and durable construction. They also offer a wide range of models, from small residential units to large commercial units. Other brands that are known for their durability and efficiency include Rheem, Bosch, and Takagi. When choosing a tankless water heater, it is important to consider factors such as your household size, hot water usage, and budget. Consulting with a professional plumber can also help you choose the best tankless water heater brand for your specific needs.
Which tankless water heater brands offer the best warranties and customer support?
When it comes to tankless water heaters, several brands offer impressive warranties and customer support. Here are some of the top brands to consider:
1. Rinnai: Rinnai is a popular brand known for its high-quality products and excellent customer service. They offer a 12-year warranty on their tankless water heaters, which is one of the best in the industry.
2. Navien: Navien is another brand that offers exceptional warranties and customer support. They offer a 15-year warranty on their tankless water heaters, which is one of the longest in the industry.
3. Rheem: Rheem is a well-known brand that offers a wide range of tankless water heaters. They offer a 12-year warranty on their products, and their customer support is known for being responsive and helpful.
4. Noritz: Noritz is a brand that specializes in tankless water heaters and offers a 12-year warranty on their products. They also have a reputation for providing excellent customer support.
5. Takagi: Takagi is a brand that has been around for over 60 years and offers a 15-year warranty on their tankless water heaters. They also have a knowledgeable customer support team that can help with any questions or concerns.
In conclusion, when looking for a tankless water heater, it's essential to consider the warranty and customer support offered by the brand. The above-mentioned brands are known for their exceptional warranties and customer service, making them a great choice for anyone in the market for a new tankless water heater.
Which tankless water heater brands offer the most advanced technology and features?
There are several tankless water heater brands that offer advanced technology and features to provide efficient and convenient hot water supply to households. One of the most popular brands is Rinnai, which offers tankless water heaters with features such as Wi-Fi connectivity, voice activation, and leak detection. Another renowned brand is Navien, which boasts advanced features such as recirculation technology, dual stainless-steel heat exchangers, and an intuitive control panel. Other notable brands that offer advanced technology and features include Rheem, Bosch, and Takagi. Rheem, for instance, has a wide range of tankless water heaters with features such as high energy efficiency, low NOx emissions, and self-diagnostic systems, while Bosch offers models with digital temperature control and modulating gas valves. Takagi, on the other hand, provides tankless water heaters with features such as flow rate sensors and air-fuel ratio (AFR) sensors for optimal combustion efficiency. Overall, these tankless water heater brands offer state-of-the-art technology and features to ensure efficient and convenient hot water supply to households.
