Do you own an RV? If so, chances are you know that keeping your water tank full can be a real pain. Not to worry though, because today we’re going to talk about the top RV tankless water heaters on the market!

These heaters are perfect for people who like to camp or travel, because they don’t require a water tank. Instead, they use gas or propane to heat up your water as you need it.

When it comes to choosing an RV tankless water heater, there are a lot of factors to consider. Size, price, and features are just a few of the things you need to think about when making your decision. In this review post, we discuss our top picks on the market today.

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Best Tankless Water Heaters for RVs

	GIRARD Tankless RV Water Heater	CAMPLUX Mini Tank Electric Water Heater ME40	EZ 202 LPG Portable Tankless Water Heater
Power:	LP gas	Electric, 120 volts	LP Gas
Heating:	42,000 BTUs	1440 watts	84,000 BTU
Flow:	6 GPM	4.0 GPM	4.0 GPM
Other:	Temperature setting range from 95°F to 124°F	Temperature setting from 50°F to 149°F	Ignition source two "D" cell batteries
	Check Price on Amazon	Check Price on Amazon	Check Price on Amazon

Quick Answer: The 7 Best Rated RV Tankless Water Heaters For 2025

1. GIRARD Tankless RV Water Heater
2. CAMPLUX Mini Tank Electric Water Heater ME40
3. EZ 202 LPG Portable Tankless Water Heater
4. CAMPLUX Propane Tankless Water Heater
5. RecPro RV Tankless Water Heater
6. Rheem Tankless Electric Water Heater
7. EZ 101 Outdoor Tankless Water Heater – Propane

RV Tankless Water Heater Reviews

1. GIRARD Tankless RV Water Heater

Girard is a reliable brand you should be be looking at. The Girard Tankless Water Heater, more specifically, the Girard 2GWHAM, is our selection for the best from this reliable brand.

One of the most impressive features about this is how quietly it operates. Now, even though it does come across as bulkier than other similar models, it’s very effective with regards to giving you the hot water you need in your RV.

This unit will perform during the cold winter months with its freeze protection so you’ll be able to enjoy hot water all winter winter. Being a LP gas heater it uses a burner that you can adjust to set the temperature between 95°F to 124°F.  It also features a microprocessor control, which monitors the temperature.

Bottom Line

The Girard Tankless is perfect for those who want a quiet, effective water heater. You can easily install it in your RV or small cabin to enjoy hot water for your shower. Keep in mind you need high water pressure to achieve that 6 GPM flow rate.

2. CAMPLUX Mini Tank Electric Water Heater ME40

Now onto the best 120V model, the Camplux ME40. When you are outdoors, you need a good source of hot water for a nice shower or washing dishes and Camplux is a very reliable brand.

With this 120V tankless water heater, you can enjoy up to 4 gallons of hot water whenever you want, no waiting! You can easily use it for an RV, a cabin, or a small holiday house. The unit well insulated and durable with a fast recovery rate that means you won’t have to wait long for hot water.

It has an external dial that you can use to control the temperature of the hot water you want. The adjustable thermostat featured in this device means that once you set the temperature, this heater will automatically control the water temperature. It has a red indicator lamp that will remain illuminated while this unit is heating the water.

You also don’t have to worry about heater-related accidents either, as this model has the CSA listed temperature-and-pressure relief valve to ensure your protection.

Bottom Line

The Camplux ME40 is a mini water heater that packs a lot of power in a small design. By giving you 4 gallons of hot water, you can use it to make life comfortable while you are enjoying your RV adventures.

3. EZ 202 LPG Portable Tankless Water Heater

Th EZ is one of our top overall picks. If you are looking for a reliable tankless heater, this one is it. The EZ 202 gets its heating power from propane gas and with ignition from batteries you don’t need any AC power source.

It uses a simple knob that you use to set the water temperature. There are the winter and summer options. You can adjust the flame level, as well as the water flow and it has a digital display to let you know the water temperature.

This heater comes as a kit with a shower head and a hose, both of which are portable too. If you are handy you can install this by yourself without needing a professional. With good water pressure it will give you 4.0 gallons per minute of hot water.

With a consistent temperature you don’t need to worry about getting burned. The EZ Tankless Water Heater is our top picks because of how powerful and easy to install and use for your RV.

4. CAMPLUX Propane Tankless Water Heater

Next we have the Camplux 10L Gas Tankless Water Heater. If you are someone who wants to buy a dependable and long lasting tankless water heater that’s perfect for your RV, this heater should be high on your list!

This model makes use of LP gas for power so no electricity is needed. Connect up the propane tank and you are ready for some hot water!

To ignite the LP gas, you use 2 DD batteries, or you can use an electric hookup. Adjusting the temperature is a simple matter of adjusting a dial as well as the water flow. This portable heater gives you 2.6 gallons per minute of hot water.

You can use the included hose to connect it to a water source. The compact design doesn’t take up much room and has anti-freezing, as well as overheating protection.

Bottom Line

The Camplux 10L tankless water heater is a great option with its ease of installation. It couldn’t be easier to use, adjust the dials to get the water flow and temperature you want.

5. RecPro RV Tankless Water Heater

Next up is the RecPro Tankless Water Heater. RecPro is a well-known brand, so selecting this heater means you can relax knowing it will be a reliable tankless heater. As well as it being a reliable brand, this model from RecPro is a good value for the money.

This heater gives you a low-pressure startu and only needs 2 PSI to begin working. It gives you a hot water flow rate of 3.0 gallons per minute, which is quite impressive. Its vent-free technology allows you to install this heater indoors.

With a simple installation process it can be DIY project .You should note that this also has a magnetic water flow sensor. Thanks to this innovative technology, this heater can function effectively even when there’s low water pressure. So, if you are in an area without a lot of water pressure you can still use this heater.

Bottom Line

This RV tankless water heater from RecPro is the beat option for RV parks or campgrounds without a lot of water pressure. The innovative technology makes it convenient to use indoor and outdoors.

6.  Rheem 11kW 240V Tankless Electric Water Heater

Maybe the best the electric water heater, we have the Rheem Electric Tankless Water Heater, specifically the Rheem RTE 9. Rheem has a great reputation for making quality products and this unit won’t disappoint you.

This heater does a great job providing you with continuous hot or warm water anytime you need it. The instant on electric heating provides hot water in seconds!

It truly is instant on hot water! With a hassle free installation process and a compact design takes up little space. The controls are easy to understand and temperature settings are easy to change.

The system has a thermometer that lets you know the water temperature and has a flow rate of 2.6 GPM. This unit also has a standby mode, and the LEDs on the display will tell you when the unit is active or is on standby.

Bottom Line

This impressive electric tankless water heater from Rheem is easy to use and install. It is portable and perfect for those who don’t want to or don’t have access to a gas power source to operate a water heater. Please note that this heater uses 240V as it’s heating source.

7. EZ 101 Outdoor Tankless Water Heater – Propane

If you’re looking for a propane-fueled tankless water heater for your RV, we have the EZ 101. This unit is not only perfect for your RV, but is also a perfect for a tiny house, cabin or a camper.

The EZ 101 was designed and manufactured in the USA so you can be assured it’s built to last! This heater won’t turn on unless you turn the hot water tap. And it’s really economical too, using only half of the propane of similar models. This heater will give you, on average, approximately 940-gallons of hot water with a standard 20 pound propane tank.

Also, weighing only 32 pounds, it’s considerably lighter than other similar mode. The temperature remains consistent with the automatic gas modulation. This model self-regulates to give the flow of hot water you need.

It also has freeze protection, which means it can continue to operate effectively throughout the winter. As long as you have water flow, this unit will provide you with hot water.

Bottom Line

The EZ 101 is the best propane tankless water heater for the money. You can easily install it in your RV for the hot water you need and enjoy a nice hot shower anytime.

Buyer’s Guide For RV Tankless Water Heaters

Now we look at all things you need to know before shopping for a tankless water heater, including how to work out the size you need and how to choose the best one for your set up.

We also compare standard tank heaters and tankless water heaters so you’ll be able to make a better choice before you go shopping. We’ve included a step-by-step guide on how to install a tankless water heater in your RV, and an FAQ section so you’ll be fully prepared by the end of the article.

What Size of Tankless Water Heater Do I Need?

Before you go ahead and buy a tankless water heater for your RV, you need to figure out what size you need. To determine the size, you have to determine the temperature rise you will need, as well as the flow rate.

Always begin by counting the number of devices you would prefer to run. You’ll need to add up the flow rates or the gallons per minute (GPM) of each device. As well as this, determine the temperature of the water source and how hot you would like the heater to make it.

Once you have made these calculations, you should look at the specifications and see the GMP they are able to provide, as well as how high they can take the water temperature.

How Does a Tankless Water Heater Work?

A tankless water heater works by directly heating the water without there being a need for a storage tank. This means that when you turn on a hot water tap, the cold water will move through the pipe and into the heater. Depending on the type of the heater (electric or gas powered), the device will begin to raise the water’s temperature, and you’ll be able to enjoy a continuous supply of hot water.

There’s no need for a tank to be filled and then heated when you’re using a tankless water heater. You can also go ahead and install several tankless water heaters depending on the demands you have.

How to Choose a Tankless Water Heater

Choosing the right tankless water heater for your RV can be a chore if you don’t know what to look for. You don’t want to waste your money on buying a water heater that can’t meet your requirements for hot water, right?

To make things easier for you, we’ve shared certain specifications you should keep an eye on when shopping for one.

Gallons Per Minute (GPM)

The model you purchase should be able to deliver the gallons per minute or the GPM you require. A higher GPM means you’ll be able to use more devices simultaneously, especially those that need a higher GPM such as high-powered showerheads.

Source of Power

You’ll need to see whether you prefer an electric tankless water heater or a gas water heater. Both can heat water, but it all comes down to what you are comfortable with.

Ease of Use

The water heater you buy should be easy to use. No one wants to waste time trying to figure out how to properly use the dials and the knobs to select the temperature you prefer.

Safe to Use

You should opt for tankless water heaters from reliable brands. By doing so, you will be buying a unit which is safe to use and will prevent any heating accidents down the line.

Can Any Tankless Water Heater Be Used in an RV?

Tankless water heaters are designed for the same purposes, whether they are used in homes or vehicles. All the models aim to provide the same goal, which is heating up water for multiple purposes. However, when you want to purchase one for your RV, then many factors must be considered, like size, supply, etc. Otherwise, you may use any unit.

RV Water Heater Tank vs. Tankless – Comparison Overview

Both of these models will get the job done and prove to be efficient. However, they have their own set of features. Here’s how the two variants compare:

Cost

Tank-based models work efficiently and are cheaper than tankless models. However, the latter is worth the huge amount of money as it takes away the hassle of dealing with a tank yet gives you a constant flow of hot water.

Operation

Tank-based models either use a pilot light or have direct ignition of spark. They regulate water, and the built-in safety systems keep water from getting too hot and avoid pressure build-up.

Since these models come with tanks, they occupy more space and don’t offer any advanced technologies. The water inside tank-based models experiences heat loss, meaning they constantly work on reheating the water. 

On the other hand, tankless models consist of advanced technological systems and ensure simple operation. They are compact and portable and only occupy very little space. They instantly warm up your water when required, and are perfect for camping trips, in our opinion..

Installation

Installing tank-based models is simple, especially compared with a tankless water heater. That said, tank-based heaters require a tank with a holding capacity of six to ten gallons, depending on the unit’s size.

Tankless RV Water Heater Pros and Cons

Pros

Investing in a high-quality tankless water heater for your RV is going to change your life for the better in more than one way.

Hot Showers

The biggest perk of investing in a tankless water heater for your RV is you’ll get to enjoy hot showers whenever you want.

No More Waiting

A good option will do away with the need for you to wait a long time for the water to heat up to the temperature you want.

Saving Space

A high-quality unit won’t take up too much space, making such heaters perfect for RVs or other small living areas.

Convenience

Having hot water on demand increases overall comfort in your life, especially during the cold winter months. You’ll be able to wash your face with warm water. You will be able to wash dishes with hot water without having to tolerate cold water running through the pipes in winter.

Cons

There is no doubt that tankless water heaters have contributed a lot to RV owners’ comfort level, but they still come with a few disadvantages.

Inconsistent Temperatures

Tankless models have inconsistent temperatures, which is what most people complain about, too. This comes from the heater not being able to flow hot water to different outlets simultaneously. They also do not switch on if the faucet is a little open, like while shaving or brushing teeth.

Limited Supply

These models are designed to supply a steady flow of hot water, but the supply could be limited. If an individual is taking a shower while someone is using the washing machine, this device will not be able to keep up with the hot water supply. A standard water heater can store more gallons of water and supply hot water to multiple sources at the same time.

Types of RV Tankless Water Heaters

The available types depend on the kind of power such heaters use. When searching for the best model, the different types you will come across are:

Propane Water Heaters

These are the most common type of RV tankless water heaters. As the name suggests, they use propane as a power source for heating water. They’re considered to be faster than electric heaters, and they’re easier to maintain.

Electric Water Heaters

The electric water heater is the cheaper selection out there and they are also easier to use than gas models. They don’t make a lot of noise and can be quickly installed.

Combination Type Water Heaters

It’s always good to have options when it comes to these units. A combination type means you can choose whether you wish to use gas or electricity to operate a heater for the hot water you want.

How to Install a Tankless Water Heater in an RV

When installing a tankless water heater in an RV, it is crucial that you refer to the manual. Depending on the model, as well as the source of power (gas or electric), the installation process is going to be different.

However, there are specific vital steps you should follow before installation.

1. Always make sure the water supply is off.
2. Also, make sure the gas supply is off.
3. Ensure the DC electrical connection is turned off in the RV from the main power supply.
4. Carefully detach any model previously installed in the RV.
5. Clean the space.
6. Install the new unit.
7. Make sure it fits perfectly.

Certain models can be installed outside while some can be installed inside the RV. It all depends on the type of model you are comfortable using. Again, always make sure to refer to the manual for safety reasons. Also, remember to test it after installation to see if you did it correctly.

FAQs About RV Tankless Water Heaters

In this section, we have answered some common questions people tend to have about tankless water heaters.

Can You Put a Tankless Water Heater In an RV?

Yes, you can. In fact, RV users want to put a tankless water heater in their RVs. It occupies very little space, but you want to place it somewhere it can be well connected to the power supply. However, these devices can be installed outside your RVs as well.

How to Winterize an RV Tankless Water Heater

Your tankless water heater will likely need to be winterized when not in use for a while. It is important to protect your device and plumbing system, so it does not fail to work when needed. You will have to take some steps to complete the process.

First, switch off the power and gas. Drain out your unit completely as there might be some water left in it. Reach out to the main valve and shut off the water supply. To release pressure and to allow the system to drain out from the plumbing system, open the taps. Then, detach the water pipes from your device and remove the inlet water filter.  Lastly, collect the remaining water and ensure it completely drains out.

How to Keep a Tankless Water Heater From Freezing

There’s more than one way for you to keep a tankless water heater from freezing.

• Installing your heater in a warm place is generally advisable.

• Draining your water heater can prevent standing water from freezing.

• Having the heater connected to electricity can ensure the unit’s freeze protection feature continues to work.

• Having insulated piping can also help ward off frozen pipes.

• Running a trickle of hot water throughout the night can also prevent freezing.

How Many Amps Does a Tankless Water Heater Use?

The number of amps a model will use to heat the water to the temperature you want depends on the model you are using. On average, an electric unit will need 120 amps to operate. While electric water tanks can help you save money on energy consumption in the long run, you need to make sure your RV’s total electrical capacity is able to provide the heater you are interested in with the amps it needs.

How to Vent a Tankless Water Heater

Tankless water heaters are commonly vented in two ways. There is the direct vent and the power vent. The direct-vent heaters will pull the air in from the outside. They have two vents. One is for intake, and the other serves as the exhaust.

Power vent units only need an exhaust vent. That is also why it must be installed in a larger area which has enough air for combustion.

Outside units are built to resist below-freezing temperatures and don’t require additional venting.

You can have a tankless water heater vent through a side wall or the roof. The more traditional gas units will need to be vented through the roof.

Final Thoughts About RV Tankless Water Heaters

Tankless water heaters are very convenient and perfect for life in an RV. They take up less space and offer hot water when you need it.

They’re perfect for people who camp or travel frequently, because they don’t require a water tank. Instead, they use gas, propane, or electricity to heat up your water as you need it. So what are you waiting for? Go get the best RV tankless water heater for you today!

We hope this article proved to be a valuable resource for you, and if you chose any from our review, please feel free to drop us a line letting us know how it has improved your road trips.

Alyssia

Hello, fellow wanderers! I’m Alyssia. Since 2008, my husband and I have called an RV our home, journeying through life one mile at a time. Our nomadic lifestyle has led us to over 70 countries, each with their unique tales that have shaped our own.

I share our stories and insights right here, hoping to inspire and guide you in your own adventures. Expect tips on RV living, our favorite camping spots, breathtaking hiking trails, and the joys and challenges of an ever-changing view from our window. Alongside, you’ll also find practical advice on outdoorsy stuff, designed to equip you for any journey. Join us as we continue to explore the vast, beautiful world on wheels!