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Best RV Tankless Water Heaters 2024

    Updated January 2, 2024

    Best Tankless Water Heater for RV

    Camplux Portable Outdoor Tankless Propane Water Heater

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    The Camplux BW264 is one of the Best RV Tankless Water Heaters in 2023 and was designed for camping and RV vacation. It is easy to install and can be mounted outside or indoors as long as there is some kind of vent flue pipe to handle the gases emitted from the propane flame. The ignition system is paired with a D-cell alkaline battery, so you can really run this cool tankless water heater off the grid. It is designed to produce a comfortable 2.64 gallon of hot water per minute heated by a 68,000 BTU propane burner. This RV instantaneous water heater does not come with a water pump but will work with most standard 12 volt water pumps. Camplax offers its own 12-volt 1.6 GPM flow pump, specifically designed to work with this model. The Camplux BW 2644 also has an eco / full switch function that helps you use less propane during the summer months! It works great with the Camplux 12V 1.6 GPM water pump. It is designed with “dry burning protection” as well as a special flame failure device and anti-freeze protection.

    The Camplux Propane Water Heater is a small, compact and lightweight option that will provide you uninterrupted hot water flow rate of 1.26 gallons per minute. It is designed to be 11.5% more energy efficient than standard tank heaters and delivers a maximum of 28,000 BTU. This water heater works best with the Camplux 12 volt water pump but is compatible with other modified versions of the 12 volt, 1.2 gallon per minute water pump. The Camplux heater is designed with various safety features including protection from overheating, freezing, flame failure, low water flow, high water pressure and dry burning. In the event that it detects any of the above complications, an automatic shut-off switch will immediately turn off the heater. If it is attached to a propane tank it is recommended to use it in a ventilated place.

    This lightweight and versatile option is perfect for enough hot water supply for rv campers. The compact design is highly efficient, saving 11.5% more energy than a conventional tank heater. Its maximum output is 68,000 btu per hour (or 2.64 GPM), giving you more than enough supply hot water for hot showers, dishes and even baths. . Everything you need to install your new radiator includes a CSA approved gas controller and the necessary adapters. It is also easy to use once installed. Simple dials allow you to easily control the temperature and pressure. Finally, the device has been tested at altitudes up to 2000 feet, so you can use it in a variety of places.

    Best Portable Tankless Water Heater for RV

    Eccotemp L10 High Capacity Outdoor Tankless Water Heater

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    Eccotemp is an American family business that specializes in energy efficient equipment. They follow it with a strong focus on customer service. Your EcocTemp L10 2.6 GPM Portable Propane Tankless Water Heater is designed for campers to allow you to carry hot water on demand with you while away from most traditional thermal heating sources. It produces hot water at the rate of 2.6 gallons per minute. It comes with a controller and hose designed to connect to the standard 20 pound liquid propane tank. It has an electric ignition system powered by two common de-alkaline batteries. It is compatible with most 12-volt water pumps although they provide their own ecoflow pump and strainer. With gas controller and hose, this L10 set includes shower head and garden hose adapter, plus water outlet, quick connection.

    In addition to the easy installation of the RV tankless water heater, you should look for a product that offers you a portable and light weight construction so that it can be used for a variety of outdoor uses. This product is effective for pets, off-grid use, camping and outdoor showers. By choosing the EccoTemp L10, you will enjoy your day at the campsite as you can be sure that there will be a gradual supply of hot water for the beautiful fountains away from your home.

    This rv water heaters is useful not only for motorhome, but also for other applications because it is portable. This will help you to enjoy your day in the lake or pool. With it you can simply attach a 20lb propane tank and a garden hose. Then you and your loved ones can enjoy a hot shower or hot water wherever you are. The model is effective not only for camping but also for the home. It can also be used for small houses, cottages and condominiums. It can handle between 50 and 140 degrees F. Another amazing feature of this model is that it can be used in locations outside the grid where power is not available. Its electronic ignition can be operated with two batteries D batteries you will also appreciate that it is suitable for 12V pump. Also, this model can work with an ecoflow strainer and pump.

    Atwood RV Water Heater G6A-8E

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    This 8,800 BTU, six-gallon water heater allows you to take hot showers whenever you want as long as you have gas, electricity, or both. This efficiency allows for quick recovery and gives more hot water cycles while using less cold water. Furthermore, this heater includes a door that allows you to access around 95 percent of its serviceable and replacement internal parts. The door also enables you to operate the heater both inside and outside.

    The heater is made of aluminum-clad tanks for corrosion resistance, and it features a temperature control and pressure relief switch for safety. In terms of performance, the machine can deliver 6.2 gallons per hour on electricity, 11.6 gallons per hour on LPG, and 17.8 gallons per hour when both are used together. The unit should recover in around 10 minutes for the next shower session.

    It’s also made of a highly robust substance that has been shown to withstand the dreadful effects of rusting and corrosion. In reality, this product includes an aluminum rod that functions similarly to an anode rod and will protect your water heater for at least 10-15 years.

    This tank-based model will also suffice in those 10 to 15 years. It includes twin power sources, so you’ll always have access to hot water. It also includes a direct spark ignition, which makes it considerably easier to use than other tank-based systems with pilot light activation.

    One disadvantage is that it costs more than other tankless water heaters. In addition, the heater may arrive with some missing parts, such as the door, hinge, or other interior components. When you acquire your heater, you must properly inspect it. Furthermore, when it is turned on, it emits a small buzzing sound.

    PrecisionTemp RV-550 Tankless Water Heater

    Precision Temperature The RV-550 was designed to save water and energy, while also serving as a tankless RV tank heater. It weighs only 32 pounds, which is a fraction of a traditional water heater tank. It only heats the water when a hot water tap is turned on, which can effectively cut the total propane consumption for hot water by almost half compared to a traditional water heater. This is also due to the fact that the RV-550 also features true automatic gas modulation, carefully adjusting the use of active propane according to changes in temperature and water flow.

    One of the most versatile products on this list, the Precision Temp RV 550 Tankless Water Heater, has proven effective in many situations. It has proven that it can deliver top performance in RVs, cabins, trailers, booths, and even mobile wash services. It thrives in all of these situations for a fairly simple reason: its design. You see, PrecisionTemp created this device to make sure it was as light and compact as possible, making it easily manageable / portable.

    It also helps that this particular water heater is among the easiest to install on the market. In fact, the installation process has been regularly praised in customer reviews, which is rare for products like an RV water heater. And once installed, it will heat up your water blazingly fast with its 55,000 BTU power. The nominal flow of 1.5 GPM (gallons per minute) is not a bad idea either and should be able to give you a high quality shower whenever you need it. This unit is also highly energy efficient and works smart as it can self-adjust according to incoming weather conditions. And the last feature to put in the column pro is its low noise performance level.

    Best Natural Gas Tankless Water Heater for RV

    Rinnai RUC98iN Ultra Series Indoor Natural Gas Tankless Water Heater

    The Rinai Ultra Series is gas water heater and a premium option for any RV owner looking to enjoy an unlimited supply of hot water. It runs on natural gas or propane and can supply a maximum of 199,000 BTU. It is designed with innovative technology aimed at reducing emissions of harmful nitrogen compounds. This is why it is safe for indoor use and can be installed anywhere as it has a space saving design. The unit uses condensing technology and can provide up to 90% energy efficiency when the water is constantly flowing. This makes it a great alternative for commercial use because it doesn’t use a lot of fuel. Its most notable features are the double ventilation option: solid PVC ventilation and double pipe.

    The water heater Rinnai RU80EN 8.0 RV tankless water heater is designed to operate on natural gas. It should be noted that propane in natural gas contains about one-third of the energy concentration and therefore it is not available at the consumer level in traditional disposable storage tanks. This means you will need a reliable source of natural gas, such as hooking up a natural gas line to an RV park. It uses a special “condensation technology” that makes up most of the already energy-efficient nature of natural gas. The net result is that it has 97 percent thermal efficiency which surpasses propane for higher energy savings. It also meets emissions standards issued by the states of California and Texas. It produces a solid 8 gallons per minute which means it has a flow to allow one to bathe while the other washes dishes or runs the dishwasher of the RV. This is a condensing tankless water heater, which makes the most of the possibility of heat.

    If you are looking for something more powerful for stable houses then Rini is here for you. Their outdoor tankless water heaters run on natural gas and use condensing technology for greater efficiency – resulting in more savings! In fact, the radiator can achieve a thermal efficiency of 97%, which allows you to save a considerable amount of gas. The Renaissance device also meets NOx emissions standards in California and Texas, so you can safely shower knowing that your activities are impacting the environment as much as possible. Users also report saving up to প্রতি 50 per month in fuel, which means the device pays for itself for a while!

    GIRARD 2GWHAM Tankless Water Heater

    GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation - 2022107534
    • POWERFUL PERFORMANCE — At 42,000 BTUs, this continuous hot water heater provides optimal performance for RV plumbing. The quiet, brushless motor runs on 12V power that operates at less than three amps for a nearly noiseless operation

    The Girard 2GWHAM On-Demand Tankless Water Heater provides the homeowner with an efficient and easy-to-use model that gets the job done smoothly. And it also has some pretty cool features that should put this at the top of your list. One of these features is its construction with a built-in microprocessor, which can track incoming low temperatures. In fact, you don’t just look at it; it also adjusts the necessary heat requirements for the winter season. It also has protection against frost, which makes it specially prepared to survive the winter months. If you’re a full-time or winter camper, there aren’t many better options than this Girard RV Tankless Water Heater, given features like these.

    This Girard electric tankless water heater offers an impressive 42,000 BTUs, delivering hot water even in large RVs. I love that it offers an infinite amount of hot water whenever I need it, and I never have to worry about running out of water in the middle of the shower. The heater also maintains an even water flow through a built-in microprocessor designed to automatically detect and adjust the temperature. With no reservoir, the radiator setup is small and straightforward. It is not necessary to connect LPG lines, anodes or bypass valves to the system. You can also use gas or electricity, benefiting from a 12-volt DC power supply that operates safely at less than three amps.

    While many water heaters require winterizing if you plan to use them in sub-zero conditions, the Girard electric water heater is designed to withstand the cold without a problem with freeze protection. With heavy use, this heater can wear out quickly. Many users have found that it can also be difficult to contact customer service for help. It is better to follow proper maintenance to avoid radiator failure along the line.

    Takagi T-H3M-DV-N Condensing Direct Vent Tankless Water Heater

    Takagi water heaters use condensing and powerful PVC direct vent technology to heat water in storage tanks directly or indirectly. It is not only useful for heating shower water, but it may also be used to heat a room or a swimming pool in radiant floor systems, hydronic heating systems, and other home heating applications.

    The machine is powered by natural gas and includes both a primary and secondary heat exchanger for improved heat transfer. The primary heat exchanger is constructed of commercial-grade copper alloy, which has a 25-fold higher thermal efficiency than stainless steel. The secondary one is made of stainless steel for better corrosion resistance. It also includes a slew of safety measures, such as an overheat cut-off switch, an air-fuel ratio sensor, and a freeze protection system.

    The biggest disadvantage of this heater is that it can be fairly loud when the vent fan is turned on. Also, you may need to have the tap running full blast to receive warm water, which may result in a lot of water waste. Furthermore, installing the unit may be difficult for anyone who lacks technical knowledge.

    Bosch Electric Mini-Tank Water Heater Tronic 3000

    Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
    • CONVENIENT HOT WATER HEATER: 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 13.5 D Inches

    The Bosch ES4 Tronic 3000 T Electric water heater has a surprising 4-gallon capacity for such a compact RV tankless water heater. You can put this 13.75 x 13.5 x 13.75-inch item beneath your RV’s kitchen or bathroom sink if necessary! It is intended to be charged by a conventional 120-volt AC outlet and comes with a 3-foot power wire.

    If you like, you can connect it to another larger hot tank to provide more reserves on demand.The Bosch ES4 Tronic 3000 includes an external control dial for precisely adjusting the temperature range, as well as a temperature-and-pressure relief valve.

    The tank’s interior is glass-lined, providing greater insulation and corrosion resistance.The Bosch ES4 is one of the best tiny tankless water heaters on the market if you need a simple RV instant hot water heater that runs on 120 AC and can be put beneath an RV sink.

    Things to consider before buying the best RV Tankless Water Heater

    Tank or Tankless

    The most important question looming over this entire process is whether you should go tank or tankless. As previously stated, there are advantages and disadvantages to falling on either side of this debate. Tank-based models, for example, will get the job done while costing substantially less than a tankless model upfront. However, these types are larger and take up more room, and they do not provide the technological upgrades that a tankless unit would.

    If you go the tankless route, you won’t have to worry with the tank, but you’ll also have a constant supply of hot water. These devices heat your water instantly and only when you need it. Tank-based devices, on the other hand, allow the water inside the tank to lose heat, which means they are constantly working to reheat the water. It is also important to remember that tankless units will wind up costing less in energy bills because they only heat the water when it is needed.

    Given this knowledge, it’s simple to understand why RV owners are opting for tankless units. However, the initial cost is much higher, and installation is a little more involved than with a normal tank-based water heater. Overall, both tank and tankless models will do the job, but knowing which one best fits your needs will make your selection much easier. So, please take the time to consider all of the advantages of both and pick which side you prefer.

    Water Capacity

    Is there a large number of persons aboard your RV? Will you be taking several showers every day? If this is the case, you’ll need a water heater that can produce adequate hot water. With this in mind, it’s critical to evaluate the water capacity of the models you’re evaluating.

    Most water heaters have a 6-gallon capacity, however for families traveling together, these typical units will not suffice. If you’re traveling with your family, search for a water heater with a 10-gallon or even a 16-gallon capacity.If you can’t find a large enough unit to meet your family’s hot water needs, you may always reduce your hot water use by taking shorter showers, turning off the faucet after each dish, and using other water-saving practices.

    Heating Capacity

    The heat output of your water heater is measured in BTUs, which stand for British Thermal Units. The higher the BTU rating, the more efficient the water heater will be in providing hot water.

    In other words, looking for the water heater with the largest BTU figure that fits within your budget isn’t the worst way to take in your quest. However, if you do utilize this strategy, make sure that this high BTU model also meets all of your other requirements.

    Power Source

    Another key factor to consider is the power supply provided by your chosen unit. In this situation, you have three options: battery-powered, electric-powered, and propane-powered.

    Determine which of the three can provide you with the most benefits. However, because of its portability, many RV owners prefer battery-powered and propane units. Electric ones, on the other hand, must be fully integrated every time.


    Understanding the size you require will make selecting the proper water heater much easier. If you don’t, you might become one of the hundreds of individuals who go online and complain about buying a water heater that doesn’t fit into the spot where their old heater was.

    With this in mind, it is critical that you determine the dimensions of your old heater before purchasing a new one. This ensures you never acquire a device that won’t fit into your RV’s setup; so, it’s vital to be careful and know the measurements you’re searching for in your new heater. If you want to acquire the finest tankless water heater for RV, you should know that some models can manage many appliances at once, while others can only handle one faucet at a time. As a result, you must determine how much hot water you will use and if a larger or smaller unit is required.

    Ease of Installation

    The installation process for these products will have a considerable impact on whether or not you have a positive experience with the product you purchase. I mean, what’s the purpose of getting it if you can’t get it to work in the first place?

    Read the customer reviews to avoid purchasing a water heater that you cannot install yourself. These reviews will give you the lowdown on how tough the installation was and whether or not the product is worth purchasing.

    You should also be aware that most manufacturers will provide an expert installation add-on, allowing a professional to conduct the installation for you. However, this add-on is extremely pricey, therefore owners on a tight budget should look for a model that they can simply install themselves.

    Frequently Asked Questions

    What is a RV tankless water heater?

    Tankless water heaters heat water without the need for a tank. Inside the radiator, the cooling water passes through the heat exchanger, heated by itself by a burner at the bottom. When the water comes out, it gets hot. To control the temperature, cooling water can be added to the flow after leaving the unit. RV tankless water heater is a useful RV device or equipment because it provides hot water according to our needs but without the need for a storage tank. This is one of the things we need for our recreational vehicle, because it allows us to have a comfortable and luxurious shower despite being away from home. And in the winter season when we need a hot shower during RV camping it is a reliable RV tool that can help us get a hot shower at any time because we usually have a high recovery rate.

    How does a RV tankless water heater work?

    This appliance always provides a luxurious shower to your family without having to wait for hot water, using electrical components or gas burners to heat the water. That said, tankless water heaters can supply your RVT with uninterrupted hot water. Unlike traditional water heaters with storage tanks, there is no need to wait for the hot water tank to fill up before using this type of water heater.

    The latest models also work with low water pressure. They can also handle with high throughput. Some can deliver more than 2 gallons per minute, while others can deliver up to five gallons per minute depending on the model. In most cases, gas models can produce higher flow rates than electric models. The good news is that the best tankless water heaters can use this combination for higher recovery rates.

    But the idea behind tankless systems is that they can heat water on demand more than conventional tank water heaters. It also saves energy because it heats the water endlessly but it does not have to be stored in a tank. The energy can be wasted with a tank used in the system where it is needed as the water has to be reheated until it reaches the desired temperature. Using a tankless system, you can save money on energy bills for electric heaters. And in most cases, these units can last anywhere from 5-10 years longer than traditional tidal tank heaters.

    Do tankless hot water heaters run on electric or propane?

    A tankless water heater requires both propane and electricity to operate. RV water heaters run on 12 volt direct current.

    Can I Replace My RV Water Heater With A Tankless?

    A tankless water heater can completely replace your RV’s water heater. They can be less expensive, and if you don’t need a lot of hot water, they can be a fantastic option. You don’t want to take a chilly shower, so make sure you choose a hot water heater that will meet your demands.

    Can I install a tankless water heater under an RV sink?

    Yes, it is possible to install a tankless water heater beneath an RV sink. Installing this item under your sink might provide you with a number of advantages. This is critical if you want to save water and avoid spending too much time waiting for the water to heat up.

    You can have hot water in an instant by connecting the heater under your RV sink. Its advantage is that it may be installed without the use of any wire or special tools.

    Do Tankless Water Heaters Need Cleaning?

    Most tankless water heaters need to be cleaned on a regular basis. The guidelines of various manufacturers varies. You should be able to locate the necessary information in your owner’s manual.