Best RV Tankless Water Heater Reviews

Even when you are living in an RV, you still would want to pursue things that can help bring more comfort to your on-the-go lifestyle. With that said, having a water heating device in your mobile home can be a good addition. But instead of those traditional water heaters that make use of a tank, consider the benefits of a tankless water heater. It can make a world of difference as to your comfort and how water is delivered to your RV.

There are a lot of tankless water heaters out there but for RV needs, make sure you are choosing the right one suitable for a smaller space. We checked out what the market has to offer and found those that offer energy efficiency, space-saving benefits, ease-of-installation, good water heating capacity and durability. Read on to discover the best RV tankless water heaters you can rely on today.

What Should You Choose a Tankless Water Heater for your RV?

There are standard tank water heaters for RV use but why should you choose for the tankless ones? The problem with most standard RV water heater is that they have a limited capacity of 6 to 10 gallons. Sure, that should be enough for a small family who will just be using this camper van for a day or two but if you are going on a week-long vacation outdoors or road tripping for weeks, that isn’t sufficient for your needs. The last thing you would want is for your hot water supply to be cut off in the middle of rinsing off shampoo from your hair.

The good thing about the tankless water heater is that it heats up water on demand. As long as you have fresh supply of water, you can have fresh supply of hot water as well. It is also more efficient to run as it only heats up water when you need it, so the machine isn’t working all the time to keep stock water hot. Because of this, it is less costly to run, and it is better for the environment. There are also fewer risks of fires as there is a lesser chance of overheating.

Another reasons to get a tankless water heater for your RV is its space-saving benefit. It doesn’t take up a lot of space unlike traditional RV water heaters that still make use of a tank.

Best RV Tankless Water Heater Reviews

Here are the products we recommend that you get:

    • Girard Prod 2GWHAM On-Demand Tankless Water Heater
    • EcoSmart ECO 11 Electric Tankless Water Heater
    • Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater
    • Sio Green IR260 POU Electric Tankless Water Heater

Check out what these products have to offer:

Girard Prod 2GWHAM On-Demand Tankless Water Heater

Girard Prod 2GWHAM On-Demand Tankless Water Heater

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This easy-to-install tankless water heater does not need special kinds of gas lines and plumbing systems to be installed, making this a winning choice for RVs and other mobile homes. It operates using 12V of power and has a heating capacity of 42,000 BTUs.

Although a more expensive option, this one can last you for a long time, thanks to its durable construction and efficient features. It has the ability to regulate the burner so that the temperature you have set remains constant. In the winter season, it’s also resistant to freezing with its freeze-protection feature.


This hot water heater is easy to use. You can regulate the temperature without problems. That is due to its microprocessor feature that effectively monitors the temperature of the water that is being delivered as well as its flow rate. As a result, you get consistent water temperature all the time. You don’t have to worry about the water getting too hot or too cold as you use it.

Many users commend its reliability and durability. Even during the winter season when temperatures drop down so low, it is still a workhorse. They said it also uses less propane that the others they have tried.

People can take long showers with the help of this water heater. It even works without a problem even if you are on a higher altitude.

Users also said it operates quietly. It also doesn’t need special installation. You can already install it with the fittings you have in your RV.


It is more expensive than others. You will also need to find a good flow rate for it to work without issues, otherwise, you might encounter problems like others.

EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11 Electric Tankless Water HeaterClick for Price

This water heater doesn’t just save you money on its upfront costs, it can also save you money with its 60% reduced heating costs. With its tankless design, you can free up 12 cubic feet of space in your RV. Use that space to store other essentials.

This product is also user-friendly. The digital control panel allows you to increase or decrease temperature in one-degree increments, so you can easily determine the right temperature setting that suits your needs. The self-modulating technology inherent in this product effectively heats up 2 gallons of water per minute so you can have a steady supply of hot water all the time. It can even supply hot water to 2 different sinks and one shower even when they are used at the same time.


This is a sleek-looking hot water heater that won’t be an eyesore in your RV. It doesn’t take up a lot of space and is easy to install.

It’s an affordable choice and it runs using electricity so there is no need to fit it to a gas line or vent it. It’s a great option not just for RVs but also for smaller spaces. Many users have installed it by themselves without requiring extra help.

This product boasts of a Smart Technology that can allow you to configure the machine for different climate setting. You can also run different plumbing fixtures in one go as this is capable of supply hot water to more than one plumbing fixture at a time.

It only heats up water on demand, giving you great savings. Its sensors can also detect water flow so even if you have a dripping faucet, it will not operate to heat up the water of the dripping faucet.


If you need to get water to heat up to a higher degree such as 160-180 degrees, you will need to figure out how to set that on your own as the diagrams might not tell you.

Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater

Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater Click for Price

Whether you need a tankless water heater for a small RV or a larger home, this one can provide the benefits you are looking for. It uses liquid propane to work and works only on demand with no need to have a pilot light turned on all the time. It also has safety features such as an electronic ignition system. Got kids? You will like its child lock technology as well.

You will also like its design. The black look with a tempered glass front panel will look modern and sleek in an RV bathroom. It’s not as difficult to install as other water heaters. It requires half-inch NPT fittings and a venting is already included.


This water heater is nice to look at with its black tempered glass panel and its simple tablet-like design.

The features are great for families using their RV. It has a child locking technology that prevents children from operating it without supervision. It is also energy-efficient. When idle, it only uses 2 watts of energy and a modern 1.07 amps when it is working.

It is a kit, so you are getting everything you need for proper installation. There is an elbow for backflow prevention, wall thimble, termination pipe, power cord and a manual to help you install it.


Some said it can be difficult to set up if you are replacing a tanked water heater with this. You might need to get additional fittings. But otherwise or if you are replacing another tankless heater with this one, installation should have no problems.

Sio Green IR260 POU Electric Tankless Water Heater

Sio Green IR260 POU Electric Tankless Water Heater Click for Price

No coil parts, no metallic elements, just an infrared heating design that is simple to use and can quickly heat up water for your RV needs. Because it doesn’t have external metal parts such as coils, this is not prone to corrosion and is easier to maintain.

You will love its compact features. It is 20 inches shorter than standard water heaters, ideal for usage in smaller spaces like RV bathrooms. It is completely adjustable as well with different water heater power levels, so you can maximize its use no matter what the season is.


It makes use of infrared technology, which is an energy-efficient technology that doesn’t require the use of heating coils. As mentioned earlier, this feature makes this easier to maintain since there are no parts that will corrode. There is no need to deal with calcium deposits anymore unlike other water heaters.

It is also a flexible tankless water heater. It comes with a water flow regulator, which is needed to ensure that your water heater is producing consistent heat. You can also go from 10 Amps to 30 Amps heating settings depending on your needs.

Installation is also fairly simple for this product. It can fit in narrow and small spaces and doesn’t require venting.


You might only be able to supply water one at a time to a fixture. If you run other appliances that use water, you might have difficulty getting the water supply you need. For RV purposes, this shouldn’t be a problem.

Which One Should You Get?

If you are looking for something that makes use of propane and has efficient heating features that won’t fail you wherever you take your RV, the Girard Prod 2GWHAM On-Demand Tankless Water Heater is a good choice. It is more expensive so it’s not for those who are on a tight budget. However, if you are looking for something long-lasting and one that you won’t have to replace for a few more years, this should be a good choice.

Get the EcoSmart ECO 11 Electric Tankless Water Heater if you are looking for a more affordable choice that uses electricity to run. You can use it to provide hot water not just to your shower, but RV sinks as well.

The Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater is great for small to moderate heating needs. It is not as expensive as the first one that also uses gas. It also comes complete with everything you need for installation. Get this if you are looking for a gas heater that is not as expensive as the first one.

The Sio Green IR260 POU Electric Tankless Water Heater is an affordable option that is great for those who don’t like to do a lot of maintenance. It is coil-less and makes use of infrared technology, so no parts will be prone to corrosions or limescale buildup.

What Should You Look For?

To help you find a good tankless water heater, here are a few things you need to keep in mind:

Your water usage.

Think about your water consumption while in an RV. If you also use a washing machine or do a lot of dishwashing, you will need a more capable tankless water heater that can produce enough heat to supply hot water to multiple fixtures at once.

Temperature and climate of the places you go to.

Some tankless water heaters might freeze up in lower temperature so if you are going to a higher location with more freezing weather, go for those that are more durable and have more power.

Safety features

Make sure you ensure that the water heater will not cause harmful gas to accumulate indoors. If it is electric, go for those that also include safety features such as child lock.

What to Do Next?

Make sure you click the links of the hot water heaters that provide the benefits you are looking for. You can also check out our homepage for additional information, product recommendations and buying guides on different things you can add to your RV.