Best RV Tankless Water Heater 2018 – Buyer’s Guide and Reviews

Tankless Water Heater For RV

Having a hot water tank in the RV is advantageous, especially when you go for biking, hiking or other escapes with your friends or family. However, the average hot water tank designed for the RVs is capable of only holding between six to ten gallons of water.

Hence, making it hard for a family or a group of five to enjoy the nice warm showers just after a great day outdoors. Thanks to the creation of the tankless water heaters which makes us not to care about any hot water tanks anymore.

There are different reasons as to why the tankless water heater is far much better than a typical hot water tank. However, the most critical feature is that it makes sure there is a limitless amount of the hot water in the RV.

Also, the tankless water heaters work only when the hot water is flowing which helps in saving up to around fifty percent of your propane consumption.

**Below, you'll find our more detailed reviews, but you can also click the links above to see current prices or read customer reviews on Amazon.

List Of The Best Tankless Water Heaters For Your RV


The RV Atwood 6 Gallon Gas water heater features a patented through a tube combustion chamber that makes it stand out from the crowd. 

Other features that you will love the heat include thermostat, high-temperature limit switch and pressure relief valve which makes it possible to prevent an upcoming problem before it hits you. Inside your coach, there is a simple flip of the switch which allows you to switch the water heater on and off using either electric or gas mode.

The electronic ignition gives you safety and convenience. It is a lightweight, water heater which makes it easily portable and that is why most campers make it their most preferred. It can fit in a single 12 – 5/8 inch x 16-1/4 cut out. When in an RV, it can easily be flush mounted into the RV sidewall. For a more attractive, integrated appearance, there is an exterior access door which is included.

It is economical and its design is an advanced one that utilizes 90 percent of the heat produced by the pilot light to conserve energy, maintain water temperature, and deliver hot water temperature, and deliver hot water faster. 

  • Has a large capacity of up to 6 gallons
  • It is lightweight, thus easy to move around
  • Comes with a 2-year manufacturer warranty
  • Directions on how to use are hard to understand
  • When in use, the tank makes a loud humming noise

2. PrecisionTemp RV 550


The PrecisionTemp Tankless Water Heater is specifically designed for the RVs, mobile washing services, cabins, small homes, trailers, and much more. This tankless water heater is small in size since it only takes half the space a ten-gallon tank can occupy.

It is as well lighter than a standard water heater. This product is known to utilize less propane as well as it is efficient in use.

It has no pilot light. The PrecisionTemp Tankless Water Heater is reliable, and it is a proven VariFlame technology control system.

Most clients find this product useful since it is designed, tested as well as assembled in the USA.

  • It uses less propane than a standard water heater
  • It is efficient in use
  • It occupies half the space of a standard water heater
  • It is not super powerful
  • It is expensive

3. Takagi T-KJr2-IN-NG


The Takagi Tankless Water Heater is the best as well as an original portable water heater in today’s market. With this product in your RV, you achieve instant as well as endless hot water at any time.

The Takagi Tankless Water Heater cannot only be used in the RV, but also in the campsites, around the house or in the cabins. This product is just the best tankless water heater you can own since you can use it to wash your car, take a hot shower, wash your boat, clean the horses or the dogs.

For an even better cleaning, you can use this tankless water heater to a pressure washer. This product operates on a “D” cell batteries; hence, it works properly for off grid and other areas where the electricity is not readily available or in places with electricity power supply problems.

  • It is portable
  • It is a multi-purpose tankless water heater
  • It is easy to use
  • It is affordable
  • It has no specified warranty period
  • It is not super powerful

4. Eccotemp L10 Portable Shower Set


The Ecotemp L10 Portable Tankless Water Heater has a 2.6 GPM water flow capacity. It uses 2 D batteries which make it suitable in the area with limited electrical power supply.

It is designed to be used in the RVs, camping and much more. Its water pressure ranges from 20 to 80 PSI. It has 20 minutes automatic safety shutoff timer. This product comes with a one-year warranty.

  • It has a one-year warranty
  • It is affordable
  • It is easy to use
  • It is portable
  • It uses less energy than a standard water heater
  • It is not super powerful
  • It requires careful maintenance



This tankless water heater can generate 18 liters per min. It uses 4.75gpm liquid propane fuel. This tankless water heater is made of stainless steel which prevents it from corroding. Also, it is designed with an LCD screen to observe your instant temperature.

It uses less propane than a standard water heater, and it is efficient in use. It has a unique automatic electrical pulse ignition as well as it lacks a standing pilot.

It operates on 2 D batteries; hence, it can be used in areas with limited electricity supply. It can be used in the RVs, small homes and much more. It has an instant boiler, and more than 75 degrees will automatically turn off.

It is approved by the ISO, and it is CE certificated. It is rated to have an input power of 32 KW and eighty-five percent thermal efficiency.

  • It is affordable
  • It is a multi-purpose tankless water heater
  • It is easy and efficient in use
  • It uses 2 D batteries
  • It has no warranty
  • Hard to contact the supplier for replacement

6. Rinnai RUC98iN Tankless Concentric

If you are looking for a residential or commercial indoor tankless water heater, then your choice should be on Rinnai RUC98i. There are several reasons as to why most people are making it one of their most preferred items for heating their water, which include the fact that, it uses natural or propane gas and it uses multiple venting options.

It is heavy though people like it due to its sleek and compact design. It comes loaded with a power, gas, and water temperature control buttons on the lower lip of the front panel. If you want to prevent unauthorized access, the temperature button doubles as a lock key thus making it awesome. The locking will enable you to make sure that, you keep the temperature of the water constantly to avoid from being too hot for the elderly and the children.

  • It is quiet and thus no unnecessary noise while it is on
  • Being compact, it means that it won’t occupy a lot of space in your home.
  • There is an unlimited supply of hot water, and you don’t have to wait for it to be availed to you as compared to conventional water heaters.
  • Its energy efficiency ratings help to save the environment
  • It is tough to install and even after installation; you will need specialized repair personnel for maintenance and who has to come from the Rinnai Company. You might need to use a lot of money for installation due to the fact of the certified personnel being used.
  • It is one of the most expensive tankless water heaters on the market

What To Look For Before Buying A Tankless Water Heater For RV

You might be stuck on what criterion to use when purchasing the best tankless water for RV. To begin with, there are three common types of water heaters which include, battery cell powered, electricity powered and propane powered water heaters.

The following are important factors as well as features to consider when buying a tankless water heater.

1. The Flow Rate of The Water

The flow rate is the quantity of hot water released per every single minute. Since most individuals utilize the RV water heaters for showering, a water heater that can release 2 to 2.5 gallons in a minute is more than enough for the average family.

2. High Temperature

A good shower demands an average of 104 to 1060 F temperatures. On the other hand, the kitchen activities may need less than 1040. The best water heater is the one that can bring along a temperature increase of between 60 to 40 degrees F.

The propane powered tankless water heaters are good in providing temperature increase than their specific electrical powered counterparts.

The overall, as well as the cost of the heater, are important factors that one should also consider while planning to buy a tankless water heater. Also, it is advisable to search for a product with specified warranty to make sure you are protected in the case when some of its parts stop to function correctly.

Things You Have To Know Before Purchasing A Tankless Water Heater

Those who travel a lot in RV enjoy engaging in activities such as biking, hiking and much more. After spending the whole day in these activities, they have to shower. A great water heater could make them enjoy the shower.

Then, what is the correct solution? Consider tankless. It assures you enough hot water for yourself as well as everyone in case you install the tankless RV water heater.

Here are the things you require to know before buying both new and used RV water heater.

1. Cost Comparison To A standard

The standard water heaters can deliver 10 gallons or 6 gallons. Normally, most of the RVs consist of water heaters that can deliver six gallons. A ten-gallon tank is not considered to be standard since it is an upgrade of the six-gallon tank. A group or a family of four, showering act will utilize up to six-gallon tank faster.

A standard ten-gallon hot water tank can take an hour for water to heat up. The tankless water heaters never run out of the hot water.

The cost of an RV tankless water heater can be around $1000 while that of a ten-gallon standard hot water tank can cost $800.

The RV tankless water heater will offer you all the amount of water you would need. There is no need for waiting for the hot water. It runs only when the hot water is flowing. It utilizes fifty percent less propane with just low working costs, and it takes up almost half the space than the standard water heater.

The RV 500 tankless hot water is also lighter than the standard water heaters. If you need to save water as well as utilize less propane, consider using the tankless water heater in the RV.

2. You Do Not Run Out Of The Propane Faster

The tankless water heaters get to utilize less propane since it does not keep water at the set temperature.

3. The Water Flows Constantly

Whether you buy a portable or permanent tankless water heater, the hot water will be in demand just by turning on the faucet. As the water starts to flow, the sensor alerts the burner to produce hot water.

4. No Storage Tank

Because there is no need for the water to be held, there is no need for a storage tank. The tankless water heater is on demand since it has an endless supply of hot water. Hence, there is no storage tank which needs to be winterized.

5. Systems Are Not Of The Same Size

It is recommended you first check the size of the opening you own before purchasing your new water heater. You have to check all the measurements. Your opening in the sidewall may require being larger so as you may require an adjustment or two.

6. Savings

The tankless water heater is not only energy efficient but also it consumes less fuel. Most importantly, it is environmentally friendly for the individuals who love being green. The standard heaters constantly hold the water hot water utilizing energy in which gets to cost you more cash. The tankless water heaters do not require to heat up the whole tank; hence, it allows you to save some money.

With this helpful information, you are now in a position to understand the basics of a tankless water heater in case you planning to buy a tankless water heater for your RV.


The period for buying hot water storage tanks for the RVs is gone, and individuals are shifting their aim towards the high quality best tankless heater for RV on the market.

After taking a look on the tankless water heaters that I have reviewed above, you might have realized that they have better efficiency and more features than the standard tank in your RV.

You get to save on energy as well as the tankless water heaters help you enjoy more showers because they aren’t limited by the tank.

The tankless water heaters assist you in regulating the temperature at which you use in showering. Some of these tankless water heaters are small to assist save on space in your RV.

Their modern and meaningful features such as the water resistance capabilities, timers, and automatic operation are just among the many features that should push you to own one.

Are you also looking for other products to prepare for your RV camping? Click here to find out about more products available on the market right now like: Mattress, Generator...etc

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