Best Small Tankless Water Heater (2024 Update)
If you’re looking for a space-saving and efficient way to heat water in your home, a small tankless water heater might be just what you need. These compact units are designed to provide hot water on demand without the need for a bulky storage tank. But with so many options on the market, how do you know which one is the best choice for your needs?
Before you buy a small tankless water heater, there are a few factors to consider. First and foremost is the size of your household and your hot water needs. A small unit may be sufficient if you live alone or with one other person, but larger households may require a larger and more powerful model. Additionally, you'll want to consider factors like your climate, your home’s existing plumbing, and your budget when choosing a model.
So, what are some of the best small tankless water heaters on the market today? How do you know which one is right for you? Consider questions like: What is the unit's flow rate, and will it be adequate for your household's needs? Does the unit meet your energy efficiency goals? What is the warranty, and what kind of maintenance will be required? With careful research and consideration, you can feel confident in your decision to invest in a small tankless water heater for your home.
10 Best Small Tankless Water Heater
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This product is ideal for providing instant hot water in small spaces, whether mounted on a shelf, wall or floor.
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Ideal for providing hot water for outdoor camping activities with its portable and propane fuel-powered design.
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It is ideal for providing hot water outdoors in remote locations where no electricity or traditional water heating system is available.
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Ideal for providing instant hot water in homes with high demand for hot water, efficient and cost-effective.
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This product is ideal for providing hot water in specific locations such as bathrooms or kitchens.
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It is ideal for outdoor use in cabins, RVs, camping, barns, and boats to provide hot water on demand.
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7
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Heating water in a small residential or commercial property without the need for a tank.
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8
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Ideal for indoor installation, providing instant hot water with a flow rate of 3.6 GPM and 80,000 BTUs.
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9
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Ideal for providing hot water on the go or in remote locations that lack access to a traditional water source.
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10
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This product is ideal for providing instant hot water without any delay, and can be mounted on the floor, shelf or wall.
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1. Bosch Tronic Mini-Tank Water Heater – Always Hot!
Introducing the Convenient Hot Water Heater, a 2.5 gallon point-of-use mini-tank that fits snugly under your sink to provide you with hot water right when and where you need it. With a thermal efficiency of 98%, this electric water heater is designed to provide you with the highest quality of hot water, while also being easy to maintain and having a long service life.
The Convenient Hot Water Heater has a premium glass-lined material that ensures its long-lasting quality. With a low Amps rating of 12A and a Volts (VAC) rating of 120, this water heater is easy to install and operates at a high level of efficiency.
One of the best things about this mini-tank water heater is its independent installation feature. With a 36-37" cord that plugs into a 120-volt outlet, you can install it independently or in-line with a large hot water source. This feature makes it easy to use in small homes, garages, offices, in-law suites, and anywhere else you need hot water produced at the point-of-use.
The Convenient Hot Water Heater also boasts a fast recovery rate, which eliminates long waits for hot water at your sink. With its ability to supply up to two sinks at a time, you can now get on-demand hot water at your every need.
Installation of this mini-tank water heater is a breeze, and it can be mounted on a shelf, wall, or floor. The bracket needed for installation is included, and all you need to do is tap into the cold water line and install the water heater directly at the sink to provide hot water.
2. Portable Propane Heater For Outdoor Camping – Camplux
The Camplux AY132 tankless water heater is an excellent choice for those who love to spend time outdoors. Its lightweight, compact, and portable design makes it easy to carry around, and its folding handle keeps it out of the way when not in use. Setting up this propane water heater is a breeze and takes only 10 minutes.
With a flow rate of 1.32 gallons per minute (at 1.32 GPM), the Camplux AY132 produces 114.8℉ (46℃) at its highest point and 46.4℉ (8℃) at its lowest point. It is ideal for use in off-grid and rural areas where hot water is not easily accessible. The lowest water pressure required for the water heater to function properly is 3.0 PSI.
The Camplux AY132 tankless water heater is CSA safety approved and features 6-in-1 protection, including anti-freezing, over-heating, low water flow, dry combustion, high water pressure, and flame failure protection. The package includes a 5 feet premium on/off shower head, a 5 feet gas regulator, a set of US-standard garden hose, and an installation hardware pack. This water heater also comes with a 1-year guarantee.
It is important to note that to avoid gas leakage caused by improper sealing of the water heater, it is recommended not to twine Teflon tape between the gas regulator and gas inlet pipe. Users should read the installation directions carefully and check for gas leaks at all times before operating.
When not in use, it is recommended that users fully disconnect gas, incoming and outgoing waterlines and store the Camplux AY132 in a warm, dry place. To prevent damage caused by freezing, the device must be properly drained if stored in cold climates. The drain stern located at the bottom right of the water heater should be opened in a counter-clockwise direction to drain the water heater properly. Users should also remember to disconnect all incoming and outgoing water lines to ensure proper drainage from the water heater.
3. Camplux 16l Outdoor 4.22 Gpm Digital Display Propane Gas Tankless Water Heater
This portable water heater from Camplux offers a convenient and efficient solution for instant hot water, wherever you may be. With an easy installation process that takes only 5 minutes, you can have hot water on demand in no time. The package comes complete with all necessary accessories, so you don't need to worry about any additional purchases.
With a flow rate of 4.22 gallons per minute, this tankless water heater can provide you with a generous supply of hot water in just a few minutes. It is designed to light up automatically when the water pressure is between 4.0-110 PSI, making it perfect for use in low water pressure situations such as camping or remote cabins.
Safety is a top priority with this water heater, as it comes equipped with a 6-in-1 protection system to ensure your family's safety. The flame failure device, anti-freezing protection, and over heating protection work together to prevent any mishaps. Additionally, the anti-freezing drain plug discharges any residual water to avoid freezing in cold areas during long-term maintenance. The gas supply is automatically shut off when high water temperature protection is triggered, preventing overheating and potential damage.
This water heater is also energy efficient, with maximum power output of 11,000 BTU/hour. The advanced combustion technology used in the propane water heater exchanger and main burner reduces gas consumption and burning noise by 11.5%. This means you can enjoy endless hot water without worrying about high energy bills.
It is important to note that to avoid gas leakage caused by improper sealing of the water heater, twining Teflon tape between gas regulator and gas inlet pipe is not recommended. Improper operation may cause the tankless water heater to catch fire, so always check for gas leakage before operation.
4. Rheem Rtex-24 24kw 240v Electric Tankless Water Heater, Gray
This water heater provides hot water on demand, making it a reliable and efficient option for any household. The ON/OFF Dial Control ensures easy operation, while the adjustable digital temperature display allows for precise temperature settings. The self-modulating power control further optimizes energy usage, providing consistent and reliable performance.
The 24kW Model Flow Rate of up to 5.9 GPM for RTEX-24 ensures a steady flow of hot water for all your household needs. The bottom 3/4" NPT water connections enable easy installation and compatibility with standard plumbing systems.
With this water heater, you can enjoy on-demand, consistent, and continuous hot water, eliminating the need for a storage tank. It is a great option for those looking to save space and money without sacrificing performance.
5. Ecosmart Pou 6 Point Of Use Electric Tankless Water Heater, 6 Kw,white,1/20, 1/40, 1/95
The hot water needs of a single sink can easily be met in warmer climates with the help of this efficient product. It is capable of providing hot water at a rate of 0.5 gallons per minute. The installation requires a 30 amp breaker and 10 AWG wire for optimal performance. However, in colder climates, it is recommended to use the POU 6 for one sink at 0.5 GPM.
It is important to note that this product is designed to be used with a single sink only and should not be used with a shower or multiple fixtures. The unit operates at 220 volts and requires hard wiring during installation. Therefore, a plug should not be used when installing the unit.
This product is not only efficient but also reliable, making it a great investment for anyone in need of hot water for their sink. With its recommended specifications and parameters, users can be confident in its performance and enjoy a steady supply of hot water.
6. Greatbear Portable Propane Water Heater For Outdoors
Looking for a portable and reliable water heater for your outdoor adventures? Look no further than the GREATBEAR propane tankless water heater. This compact and lightweight unit weighs in at just 14 lbs, making it the perfect companion for camping, RV living, cabins, farms, and more. With the MT158 portable propane water heater, you can enjoy a comfortable hot water shower just like at home, no matter where you go.
With a heat output of 37000BTU/h, this tankless water heater delivers a decent flow of hot water on demand. Best of all, there's no need for preheating – you can get instant and endless fresh hot water at any time. It's the perfect way to relax and unwind after a long day of outdoor activities.
The gas and water knobs on the MT158 are designed to be simple and user-friendly. Turning the knobs clockwise increases the water temperature, while turning them counterclockwise decreases it. This innovative and intuitive design is just one of the ways that GREATBEAR is committed to continuous improvement and user satisfaction.
When it comes to safety, the MT158 propane gas water heater has you covered. Every unit undergoes multiple strict tests during manufacturing to ensure that it meets the highest standards of quality and safety. The heater is equipped with numerous protections, including flame failure protection, overheating protection, anti-freeze protection, dry combustion protection, low water flow protection, and high water pressure protection. You can rest easy knowing that you and your loved ones are protected while using this water heater.
The MT158 tankless propane water heater is designed for outdoor installation or other well-ventilated conditions. The package includes everything you need to set up the water heater system, and installation takes just a few minutes. With a flow rate of 1.45 gallons per minute, you can have instant hot water whenever and wherever you need it. And if you ever have any issues, the GREATBEAR team is always here to help.
7. Ecosmart Eco 8 Tankless Water Heater, Electric, 8-Kw – Quantity 1, 12 X 8 X 4
This high-quality product is designed to last for a long time, providing you with reliable use for years to come. It features a durable build that ensures it can withstand regular use and resist wear and tear. The product is also incredibly user-friendly, making it easy for anyone to use without any hassle or complicated instructions.
Manufactured in China, this product is made to meet high-quality standards and undergoes rigorous testing to ensure it meets all necessary safety requirements. You can trust that this product is made with care and attention to detail, ensuring top-notch performance.
The heating elements of this product are built to last, and they are threaded for easy replacement if needed. This ensures that you can easily maintain and repair the product as needed, without having to replace the entire unit. The activation flow of this product is 0.3 GPM, making it an efficient and effective choice for your needs.
8. Mizudo Tankless Water Heater: Instant Hot!
Introducing the Instant Hot Water Heater – a reliable solution to your hot water needs. This tankless water heater has the ability to provide endless hot water on demand for 2-3 water points, ensuring that you never run out of hot water during your morning routine.
With a 3.6 GPM hot water flow and precise temperature control, you can enjoy a comfortable bathing experience without the annoyance of water temperature fluctuations or sandwiches. The heater's premium design and durable build ensures that it can withstand years of use without any compromise in its efficiency.
The Instant Hot Water Heater's compact design allows you to save over 50% of the available space compared to traditional tank water heaters. This makes it an ideal choice for those who are limited on space or looking for a more efficient hot water solution.
In the event that you encounter any product quality problems, the manufacturer offers a quality service policy. You can easily contact them by phone, email, or message and they will promptly assist you according to the warranty policy.
9. Marey Ga5port Portable Propane Gas Tankless Water Heater, Small, White
The Marey Portable Tankless Water Heater is a versatile and convenient option for those in need of hot water on-the-go. With its natural venting system, there is no need for extra venting, making it an ideal choice for outdoor use. It is perfect for a variety of applications, from washing cars and windows, to cleaning horses and dogs, and even taking a hot shower.
This portable water heater is designed to provide endless hot water on demand, only when needed. It has a BTU/h rating of 35000 BTU/h and runs on liquid propane gas (LPG). The pipe fittings are 1/2 inch NPT for incoming and outgoing water and gas, ensuring compatibility with most standard plumbing systems.
Additionally, this water heater does not require an electrical connection, making it even more convenient for use in remote areas or campsites. It comes with a gas hose and CSA-approved regulator for easy attachment to a standard liquid propane tank.
The Marey Portable Tankless Water Heater has a compact and lightweight design, making it easy to carry and store. It is perfect for use around the house or on-the-go, such as in cabins or remote areas. This water heater is a reliable and efficient choice for those seeking hot water without the hassle of a traditional water heater.
10. Instant Hot Water Heater – Bosch Tronic 3000
Looking for an efficient and convenient way to provide hot water right where you need it? Look no further than this 7-gallon point-of-use mini-tank hot water heater. With thermal efficiency of 98%, it delivers reliable hot water on demand, without wasting energy.
This larger model can be installed either vertically (with 5.1 gallons of water supply) or horizontally (with 7 gallons of water supply). The vertical orientation is installed with the cold and hot lines on top of the unit, while the horizontal orientation is installed with the cold and hot lines on the sides of the unit. This means you can choose the orientation that works best for your space.
The 7-gallon model is designed to be hard-wired, ensuring a reliable source of hot water for your home or office. With a heating capacity of 1440 watts and a temperature range of 65-145°F max, it can provide hot water whenever you need it.
Operating pressure is up to 150 psi, making this water heater a reliable and powerful choice. Water fittings are 3/4 inch Male NPT, ensuring easy installation and compatibility with standard fixtures.
This hot water heater is easy to mount, with options for shelf, floor, or wall mounting (in vertical orientation only, with water connections on top). A bracket is included for wall mounting. Simply tap into the cold water line and install the water heater directly at the sink to provide hot water whenever you need it.
With dimensions of 17.5 W x 17.5 H x 14.5 D inches, this hot water heater is compact and easy to install in a variety of locations. Whether you're looking for a reliable source of hot water for your home, office, or workshop, this 7-gallon point-of-use mini-tank hot water heater has you covered.
Best Small Tankless Water Heater FAQs
Are there any drawbacks to using a small tankless water heater?
While small tankless water heaters offer many benefits, there are also some potential drawbacks to consider. One of the main concerns is their limited capacity, which may not be sufficient for larger households with high hot water demands. This means that you may have to install multiple units or choose a larger model, which can be more expensive.
Another potential drawback is their high upfront cost, which can be a barrier for some homeowners. While you may save money on energy bills in the long run, the initial investment can be significant.
Additionally, some users may experience a delay in getting hot water due to the time it takes for the heater to heat up the water. This can be frustrating, especially if you have to wait a while for the water to get hot.
Finally, small tankless water heaters require regular maintenance to prevent mineral buildup and ensure proper functioning. This can add to the overall cost and hassle of owning one.
Overall, small tankless water heaters can be a great option for certain households, but it's important to weigh the benefits and drawbacks before making a decision.
Can a small tankless water heater be installed in a small space or closet?
Yes, a small tankless water heater can be installed in a small space or closet as long as there is enough ventilation and clearance for the unit. These water heaters are designed to be compact and space-saving, making them ideal for small homes and apartments.
However, it's important to check the manufacturer's specifications and installation guidelines to ensure that the unit can be safely installed in the desired location. In addition, local building codes and regulations may also need to be taken into consideration.
It's recommended to consult with a licensed plumber or HVAC technician to determine the best location for the tankless water heater and to ensure that it is installed safely and correctly. They can also help determine the appropriate size and capacity of the unit based on your specific needs and usage.
Can a small tankless water heater provide enough hot water for a family of three or four?
Yes, a small tankless water heater can provide enough hot water for a family of three or four. The capacity of a tankless water heater is measured in gallons per minute (GPM), and the size needed depends on the hot water demand of the household. For a family of three or four, a tankless water heater with a GPM of 7-8 should be sufficient.
It's important to note that the hot water demand will vary depending on the family's usage habits. For example, if all family members take showers at the same time, a larger tankless water heater may be necessary. Additionally, the groundwater temperature in the area can affect the size needed.
Consulting with a professional plumber can help determine the appropriate size and type of tankless water heater for a specific household's needs. In any case, a small tankless water heater can be a cost-effective and energy-efficient option for providing hot water to families of three or four.
How energy-efficient are small tankless water heaters compared to traditional tank water heaters?
Small tankless water heaters are generally considered to be more energy-efficient than traditional tank water heaters. This is because tankless water heaters heat the water on demand, rather than storing and constantly reheating a large volume of water like traditional tank water heaters.
Tankless water heaters are also more compact and can be installed closer to the point of use, which reduces the amount of energy required to transport hot water to the desired location. Additionally, tankless water heaters have a longer lifespan than traditional tank water heaters, which means they require less frequent replacements and save on resources.
However, it's important to note that the energy efficiency of a small tankless water heater can vary depending on factors such as usage, climate, and the size of the unit. It's always best to consult with a professional to determine the most energy-efficient option for your specific needs.
How much does a small tankless water heater cost?
The cost of a small tankless water heater can vary depending on several factors such as the brand, size, and features. On average, a small tankless water heater can cost between $200 to $500. However, some high-end models can cost up to $1,000 or more. It's important to note that the cost of installation is not included in the price of the unit, and can range from a few hundred to a few thousand dollars depending on the complexity of the installation and location. Additionally, purchasing a tankless water heater may result in long-term cost savings due to their energy efficiency and longer lifespan compared to traditional tank water heaters. It's always recommended to do some research and compare prices and features before making a purchase, and to consult with a professional plumber or contractor to ensure proper installation and functionality.
What are the benefits of a small tankless water heater over a traditional tank water heater?
Small tankless water heaters offer several benefits over traditional tank water heaters. First, they are much more energy-efficient, as they only heat water when it is needed, rather than constantly heating a large tank of water. This can result in significant cost savings on energy bills over time.
In addition, small tankless water heaters are much more compact and can easily fit in smaller spaces, making them ideal for apartments, condos, and other small living spaces. They also have a longer lifespan than traditional tank water heaters, as they do not have to contend with the corrosion and other wear and tear that can occur with a large tank of water.
Another benefit of small tankless water heaters is that they provide an endless supply of hot water, as long as there is a steady supply of cold water. This can be particularly beneficial for larger households or families who need to use hot water for multiple tasks at once.
Overall, small tankless water heaters offer a more efficient, compact, and convenient solution for providing hot water in homes and other living spaces.
What are the best small tankless water heater brands on the market?
When it comes to small tankless water heaters, there are several top brands that come to mind. One of the most popular is Rheem, which offers a range of reliable and high-quality tankless water heaters in compact sizes. Another great brand is Ecosmart, which offers a variety of energy-efficient tankless water heaters that are both affordable and reliable.
Other top brands in this category include Bosch, which is known for its durable and efficient water heaters, and Stiebel Eltron, which offers a range of tankless water heaters that are compact yet powerful. Additionally, Navien, Rinnai, and Takagi are all well-respected brands in the tankless water heater market, known for their quality and innovative designs.
Ultimately, the best small tankless water heater brand for you will depend on your individual needs and preferences, as well as your budget. It's important to do your research and compare different brands and models to find the one that best fits your specific requirements.
What factors should be considered when choosing the best small tankless water heater for a particular household or apartment?
When choosing the best small tankless water heater for your household or apartment, there are several factors to consider. Firstly, consider the size of the unit and ensure it fits the available space. Secondly, look at the unit's flow rate, which refers to the amount of hot water it can produce per minute. This is important to ensure that it can meet the hot water needs of your household.
Additionally, consider the energy efficiency of the unit. Look for models with high energy efficiency ratings to save on energy costs. Another factor to consider is the type of fuel the unit uses. Tankless water heaters can use electricity, propane, or natural gas. Choose the type that is most readily available and cost-effective in your area.
Finally, consider the brand and model of the unit. Look for reputable brands with a good track record of quality and reliability. Read reviews from other customers to ensure that the model you are considering has a good performance and reliability record. By taking these factors into account, you can choose the best small tankless water heater for your household or apartment.
What is the average lifespan of a small tankless water heater?
The average lifespan of a small tankless water heater can vary depending on several factors such as the quality of the unit, the frequency of use, and the level of maintenance. Generally, a well-maintained tankless water heater can last up to 20 years or more. However, if the unit is not properly maintained or if it is subjected to excessive wear and tear, it may fail sooner. It is important to note that the lifespan of a tankless water heater can also depend on the water quality in your area. Hard water with high mineral content can cause scaling and buildup in the unit, which can reduce its efficiency and lifespan. To ensure that your small tankless water heater lasts as long as possible, it is recommended to have it serviced regularly by a professional and to use a water softening system if necessary.
What is the ideal size of a small tankless water heater for a single bathroom or apartment?
The ideal size of a small tankless water heater for a single bathroom or apartment depends on a few factors. Firstly, the flow rate of the unit needs to be considered. A flow rate of around 2-2.5 gallons per minute (GPM) is generally sufficient for a single bathroom or apartment. Secondly, the temperature rise required needs to be taken into account. This is the difference between the incoming cold water temperature and the desired hot water temperature. For a single bathroom or apartment, a temperature rise of around 30-40 degrees Fahrenheit should be adequate. Finally, the electrical or gas requirements of the unit need to be considered. For a small tankless water heater, a 120V electric unit or a gas unit with a BTU output of around 10,000-20,000 should be sufficient. Ultimately, it is recommended to consult with a professional plumber or HVAC technician to determine the ideal size and specifications for a small tankless water heater for your specific needs and requirements.
