Best RV Tankless Water Heaters (2021) – Review & Buyer’s Guide

RV travellers recognize the worth of having continuous and prompt hot water on-demand, but a conventional water heater cannot cater to your needs. 

When many people accompany you on the open road in your camper, you need easy access to warm water for different purposes such as washing dishes, doing laundry, and taking baths. 

If you want swift access to unlimited hot water in your RV, you need to spend money on the best RV tankless water heaters.

Hot water has a direct influence on your capabilities to wash utensils and take a shower. Therefore, you should buy a top-level water heater that can effortlessly fulfill your requirements. 

There are many RV propane tankless water heater obtainable in the market, but not all of them are of good quality. Also, they all are different. 

Before buying a water heating system, you must take into consideration the fuel type, flow rate, and other essential traits. 

We know that finding the perfect appliance is very difficult, especially if you are doing this for the first time. Well, there is no need to feel tense when we are here to assist you.

We have designed this detailed post to guide you towards the premium quality tankless water heater for RV reviews that are currently available. 

Furthermore, we will also inform you about all the things about these models, including fuel types, flow rates, characteristics, and much more. 

Our buying guide will make your best electric tankless water heater for RV search much easier and less intricate process. By keeping this in mind, continue reading and allow us to help make this anxiety-filled experience a little easier for you.

10 Best RV Tankless Water Heaters

1. GIRARD 2GWHAM Tankless Water Heater – Best Overall

It is one of the best heaters for RV released by Girard, a leading RV tankless water heater company globally. You can utilize it for an RV and mobile home because it is easy to use and supplies unlimited warm water. 

It works on water flow, and settings are made on the GMA dial. You only have to regulate the current and set the GMDC dial to enjoy limitless hot water. It comes with a dependable burner regulating ability so that the water flow won’t alter. 

The on-board microprocessor is liable for observing the groundwater temperature, outgoing warm water, and the flow rate. It always provides continuous and stable water flow. 

With other heaters, you have to take the tension of their performance in winters. However, this is not the case with Girard 2GWHAM best electric tankless water heater for RV. 

It will run in freezing temperatures, so it is a reliable choice for cold weather, thanks to its freeze protection system. It demands 42,999 BTUs only to work proficiently. 

On the other hand, its deployment method is straightforward, and it does not have any special plumbing or LP gas lines requirements.

Along with that, it takes lesser space and saves tons of energy. Only 12 voltages of power are needed that function at less than 3 amps. 

It is a highly energy-efficient product that arrives with a brushless motor that is durable and runs silently. While working, it won’t annoy you in the middle of the night.

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2. Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric

Are you questing for the best electric tankless water heater for RV? You will then fall in love with what Stiebel Eltron Tankless Water Heater Tempra 24 has to offer you. 

This energy-smart device is engineered with a groundbreaking temperature controlling mechanism that promises steady water temperature for your comfort. 

It features a small and conspicuous white design that makes it an incredible option for RVs and tiny apartments. Its compact design helps you save a lot of floor space. 

Best of all, it does not need a venting system at the same time. You can acquire constant and on-demand hot water without sacrificing storage space. 

The water temperature ranges from 80 degrees F to 140 degrees F. While working, it does not produce any annoying noise that can disturb you. This best tankless water heater for RV does not deposit water inside it. 

Additionally, it is an environment-friendly unit that can measure the water flow electronically. Its saving monitor showcases how many dollars you have saved on electricity expenses.

It is one of the best RV tankless water heaters that use 15 to 20 percent less energy than traditional machines. However, you can save more power and money according to your water requirements. 

This powerful appliance has a digital temperature display that shows accurate water temperature. Furthermore, preset temperature memory buttons are incorporated into it. 

The compressed design and digital controls empower you to hang it on the wall or under the sink. It depends on you if you want to hide it in the closet or bathroom.

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3. GASLAND BE158 1.58GPM 6L Outdoor Portable Gas Water Heater

It is one of the best RV tankless water heaters that are powered by propane gas. This top-rated appliance can provide you with 6 liters of water that is sufficient for taking a shower or washing utensils in the RV. 

Copper and steel are used for constructing this sturdy heater, so you can rest assured to take advantage of it for a prolonged period. This affordable unit has a compact and lightweight design, which means you can carry it with you anywhere you want. 

The installation method is also hassle-free as it is free of struggles and fuses. The exciting thing is that multiple safety features are also integrated into it to keep you and your family safe. 

You are protected with a flame failure device, an anti-freezing system, and an overheating shutoff device. There is no need to invest money in employing professional deployment services because the manufacturer provides detailed installation instructions. 

This budget-friendly device’s size is only 11.8 x 6.1 x 17.3 inches, and its weight is 14.9 pounds. It relies on propane gas and Lithium-Ion 2 D batteries. So, you can save money on electricity bills. 

It is an outstanding option when you are traveling and don’t have access to electricity. Most importantly, you obtain a 1-year warranty on the mechanical aspects of the machine. Bear in mind, exterior finish and paint are not covered in it.

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4. Suburban Manufacturing SW6DE RV WTR HTR 1 PK

Suburban manufacturing is one of the notorious brands in the world. It is a big name in the propane water heater RV products and cooking items. 

This particular machine is one of their top-rated products currently attainable in the industry. What we like about it are its durability, efficient performance, and simple design. 

This RV propane tankless water heater employs a one-piece, die-formed housing that safeguards its components from abrasions, temperature, and other aspects. 

This defense is further reinforced by anode rods. The rods are deliberated for absorbing the corrosive effects from electrolysis. 

Besides, its housing makes it convenient for you to access the device’s components for repairs and maintenance. The best feature of this model is its compact size. 

It measures only 19.19 x 12.7 x 12.7 inches, which means it won’t take a lot of space in your RV. Furthermore, its heating capacity is 12,000 BTUs, which is adequate to cater to your daily hot water requirements. 

This incredible unit works with propane gas and does not need any electrical power source. So, you can efficiently utilize it, especially when you are in an area where electricity is unavailable. 

However, keep in mind that this appliance is heavy and bulky. Its weight is 32.9 lbs., so you will find it hard to carry it with you.

This 6-gallon direct spark ignition/electric RV machine relies on a molded insulation jacket. The copolymer material is used for making this jacket. The jacket is molded, so it fits the container perfectly and prevents heat loss. 

If you are already using a traditional tank heater, you can install it in the designated space. However, we would recommend you to assess the dimensions to ensure the tank fits flawlessly.  

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5. Eccotemp i12-LP Water Heater

Are you on the outlook for the best RV propane tankless water heater that has an eye-catching design? Then, give a try to Eccotemp i12-LP propane tankless water heater. 

Its revolutionary design enables you to install it in the studio apartment or cabin. Its heating capacity is 4 GPM, and at this rate, its temperature rise is 40 degrees F. 

When the temperature rise is 75 degrees F, it provides you with 1.6 GPM. It requires 2 watts of power when doing nothing. It works only when you activate the tap to get hot water. 

Moreover, it has no pilot light so that you can save a lot of money. The tankless water heater for RV uses only 1.07 A of electric energy. It is highly energy-efficient and packed with many safety and user-friendly traits. 

It integrates fully automatic temperature controls, a child lock, and an energy-saving mode. The best thing is that its ignition is electronic.

As we mentioned above, its design is unusual; the sleek black tempered glass panel looks sophisticated with its LED display screen. You can install it on the wall in your house or the RV. 

The company provides you with a 120 volt UL listed power cord. Additionally, you will receive a stainless steel venting kit. So, it will be easier for you to set it up. 

This tankless water heater for RV reviews is covered by a 10-year heat exchanger and a 5-year warranty for other parts. However, you will have to flush and descale it every three months to prevent lime and sediment accumulation. 

If you fail to maintain it regularly, the unit will stop working due to lime buildup, and the warranty will be void.

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6. Stiebel Eltron 074050 120V, 3.0 kW DHC 3-1 Single Sink Point-of-Use

Stiebel Eltron is a renowned German company of the best RV tankless water heaters for over 90 years now. They produce heaters in numerous sizes, shapes, and applications. 

Stiebel Eltron 074050 DHC 3-1 unit is also manufactured by them. When you remodel the house, the biggest issue you have to deal with is finding the accurate space to install the tankless device. 

However, it eliminates all your worries because it features a compact size. Its dimensions are 14.18 x 4.12 x 7.87 inches, which means you can fix it at your desired locality. 

The weight of this energy-efficient device is just 4.6 pounds, so that the deployment will be easier. The brand has designed it uniquely, allowing you to see how much you have saved on energy costs. 

It utilizes only 3kW at 120 volts. As it has minimal power needs, so you can mount multiple point of use heaters in your house or RV. 

Speaking of its output, you won’t be able to acquire too much from this device. It can supply only 0.5 GPM when the incoming water temperature is around 75 degrees F. 

As it is tiny and has the lowest output, so it is a fantastic option for point of use applications. You can fix it in your RV, garages or use it for individual sinks in the beauty parlors. 

This best electric tankless water heater for RV flaunts a 3-year parts warranty and a 7-year leakage warranty. Furthermore, the biggest reason to invest money in it is that it features a straightforward and effective system to prevent dry fires. 

It guarantees that your residence or RV will stay safe from the worst consequences caused by tankless heaters. The brand has tried to strike a perfect balance between usability and security while designing this product. 

The user-friendly heater can be operated easily. Ultimately, it is equipped with hydraulic control for sound control. 

It is an awesome machine that works silently, both day and night. With this model, you won’t have to deal with humming sounds as countersigned with other units.

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7. Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters

Do you need a highly effective tankless water heater for RV reviews? You can then buy Eccotemp FVI12-LP Liquid Propane Gas that needs an intense flame for warming the water as it travels through the heat exchanger. 

This specific product warms up the cold water in an instant, saving both your time and money. It is intended for indoor installation and operates only when you need hot water. 

The best thing is that sturdy materials have been used in its construction so that it will last for a longer duration. Besides, the dependable machine is bursting with essential features that make it easier to use.

As we mentioned that it is designed for indoor installation, so you can hang it in your RV, cabin, apartment, or small house without overthinking. 

On the other hand, the heater arrives with a stainless steel horizontal vent kit, which means it is ready for usage right out of the packaging. Its ventilation is safe and sturdy. 

Besides, it can be used with a propane tank ranging from 20 to 100 pounds. However, you have to buy the tank and hoses separately.  

We appreciate that it is a manual device, so you can effortlessly make temperature adjustments according to your needs. You just have to operate the knob to set the water flow and gas pressure. Best of all, the correct adjustments make this product valuable. 

The digital temperature display helps you to read the current water temp. Moreover, the manufacturer has not skipped safety in this propane water heater RV as it is armed with a safe electronic ignition system.

This tankless device boasts 30 to 80 PSI water pressure. However, the outcome is between 25,000 to 74,500 BTUs. The temperature can rise high to 77 degrees F at 2.3 gallons of water per minute. 

At this rate, the machine only uses 2 watts and 1.07 amps. Eccotemp FVI12-LP Liquid Propane Gas heater supplies 4 gallons of hot water. 

Specifications:

8. Furrion 2.4GPM Tankless RV Gas Water Heater

Are you hunting for a powerful RV propane tankless water heater? Furrion heater is here to fulfill all your requirements. Its heating power is 60,000 BTU and produces 2.4 gallons of warm water in sixty seconds. 

This model is designed to provide you hot water instantaneously and constantly, even when the temperature is below 32 degrees F. 

Interestingly, Vortex technology is integrated into it that continuously blends water to your preferred temperature. 

The dual-sensors are also present to automatically turn the power off when the temp raises a safe limit. Its door is specifically created for retrofit applications. 

You can take advantage of it as a replacement door for Atwood 4/6 gallon units as it fits the required dimensions of 18.14 x 16.14 Inches. 

Additionally, it is manufactured for resilience and performance on the streets because the brand has incorporated Vibration Smart technology in it. 

The parts can tolerate vibration encountered by a rough and bumpy road. Furrion uses high-quality materials for constructing their best RV tankless water heaters. A 2-year warranty encloses this particular product. 

It lets you set your desired temperature with its wall thermostat. You will be able to see the water temperature, time, and pressure level. When the water pressure is lower, an alarm system will inform you. 

The built-in safety systems ensure you and your family’s safety 24/7. It is engineered with advanced protection systems such as over-temperature safety and blower block safety. Furthermore, an automatic shut off and a pressure relief valve are also inserted in it.

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9. EZ 202 Tankless Water Heater – Propane (LPG) Gas – 4 GPM

Many folks like to spend time outdoors on the beach or camping. However, before going out, they have to think twice because of the pure warm water’s unavailability. 

Water for bathing is available, but they have to warm it up using a pot that is frustrating and time-consuming at the same time.

As the name clarifies, this tankless water heater for RV reviews runs on propane gas. It features winter and summer options and a flame level that makes it convenient to warm up the water efficiently. 

You can change these settings, including water flow, with the help of an easy-turn knob. It is a portable device that relies on 2 D batteries to ignite. There is a digital display screen that demonstrates the current water temperature. 

Moreover, you will receive a hose and shower head that gives you the liberty to take it with you anywhere you are going. Its knobs and slots are tightly put together, which makes it a long-lasting heater.  

When you go on a trip, more than two people accompany you. This EZ 202 tankless water heater offers 4 gallons of heated water constantly with a steady temperature. 

Thus, it can permit you to enjoy a long shower after a tiring day while your companion washes the greasy barbecue grill. Since the temperature is stable, so there are minimal chances of accidental burns. 

Best of all, it does not demand high pressure to function efficiently. You have to use the 2 D batteries to activate it. It works excellently when utilized with a garden hose because it is readily available in outdoor settings. 

This energy-efficient machine features sufficient ventilation as it uses propane. You can install it in cabins, campsites, and houses near the lakes without overthinking.

The best RV tankless water heaters are armed with an automatic shut off that turns off the heater after every 20 minutes. This feature makes it more energy-smart compared to other portable models available out there. 

Additionally, the eye-catching unit allows you to enjoy up to 40 extended warm showers from one tank of propane.

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10. Atwood Mobile Products 96121 Electronic Direct Spark Ignition Water Heater – 6 Gallon

Are you on the lookup for a compressed best electric tankless water heater for an RV that is highly energy-efficient? If so, then Atwood Mobile Products Electronic Direct Spark Ignition Water Heater is an optimal choice. 

Its recovery rate is 7.4 gallons of water per hour. Also, it uses LP gas to heat 6 gallons of water. The tank features an aluminum-clad design, and it is used for storing the heated water inside it. 

The design of this appliance is straightforward and features only one switch control and a white door. It comes with a high-temperature limit switch, temperature controller, and pressure relief valve that safeguard the parts. 

Also, it offers protection around the propane water heater RV. Best of all, a 2-year limited warranty covers it. A patented “through tube” combustion chamber is integrated into it that uses the pilot flame to help preserve water temperature. 

It prevents the heater from losing the heat energy into the environment, which means this model is also environment-friendly.

Besides, the lightweight and good-looking unit has controls that can be accessed from the front side for effortless servicing. An externally sealed combustion chamber is responsible for keeping the device clean from the outside.

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5 Things To Consider While Buying The Best RV Tankless Water Heaters

The Fuel Type

The tankless water heater for RV runs on different types of fuels. Which one is suitable for you is reliant on many factors such as your RV’s construction, your water needs, and power consumption. 

LP (Propane)

The majority of RVs, including the older and new ones, utilize LP (propane) gas to deliver warm water in the entire vehicle. It is one of the traditional and trusted fuel sources available. 

It is dependable, but it is not much energy-efficient and affordable option. Moreover, they pose more impending hazards than other heating units.  

Electricity

It is another prevalent way of fuelling your device as it is safe and more energy-smart. The best electric tankless water heater for RV is versatile, and you can operate it on generator power or park connection. However, they heat the water slowly and are very expensive. 

Motoraid

It is one of the most refined and energy-efficient methods for the best RV tankless water heaters. You can rely on the motoraid appliance because it uses fluid from your engine’s cooling system to warm up the water. 

It does not drain an external power source. An interesting thing about it is that it is an environment-friendly and affordable method of water heating. It enables you to utilize your unit while driving.

Size

It is vital to determine what size of the water heater you need. The tank-style units can store up to six to ten gallons of hot water. The correct size depends on how much space is available and how many people will be traveling in your RV. 

A bigger tank will be required in case of a mighty family. Some machines are equipped with a 16-gallon tank. Brands claim that their heaters can supply a hefty amount of hot water, but in reality, the tank can hold only 10-gallons. 

The water is heated at a higher temperature, and then, the cold water is combined in it. While determining the size, don’t forget to consider the recovery rate. 

It is a measurement of how much hot water a tankless system can produce within sixty minutes. Bigger units have slower recovery rates because they need a lot of time to warm the water volume present inside them.

Heat Output

Your propane water heater RV’s heating output is measured in British Thermal Units. If the device has a higher number of BTUs, it is more efficient in delivering hot water. 

You should look for a heater that vaunts a higher BTU number and is within your budget at the same time. If you need a gas-powered heater, make sure the BTUs are between 30k to 50k per hour.

Water Consumption

It is vital to evaluate your hot water needs before buying the RV propane tankless water heater. The estimation will give you a clear idea of what size of the device you need. 

In most situations, you need up to 1.5 gallons of water in one minute for showering. On the other hand, you can expect to use around 3 to 4 GPM in the bathtub and toilet area. 

Your sink will utilize up to 1 and ½ GPM. While selecting the tankless water heater for RV reviews, determine how many times you will use these facilities and appliances all at the same time. 

The reason is that the majority of heaters are designed to generate only 2 to 6 gallons of water in one minute. By bearing it in mind, you have to closely assess your water consumption based on the above-mentioned appliances. 

Water Flow Rate

Water flow rate is an essential factor you have to keep in mind while looking for your ideal unit. The flow rate refers to the total volume of warm water the heater produces in sixty seconds. 

Many people have an average-sized family, and they need hot water for showering only, so they should find a device that can create around 2 to 2.5 gallons of hot water.

Frequently Asked Questions