best rv tankless water heaters

The 15 Best RV Tankless Water Heaters (Review) in 2020

Chris Coleman

When the weather gets chilly, securing hot water is considered to be one of the top priorities for many RVers. Overall, standard hot water tanks may provide decent quantities of hot water but if you wish to take long showers and happen to be traveling in a large group, you need a tankless water heater.

Instead of heating small batches of water once at a time like the hot water tanks, tankless water heaters actually produce hot water on demand. Thus, if you have a tankless water heater in your RV, you could access a limitless supply of hot water.

Nowadays, enthusiasts of RVing have lots of options once it comes to tankless water heaters. That being said, to pick up the best RV tankless water heater, a good understanding of market models is required. Take a good look at this article if you want to make a worthwhile purchase.

Best RV Tankless Water Heaters Comparison Chart

NoTop-Rated RV Tankless Water HeatersPricesOur Ratings
1Eccotemp L10$$****
2Camplux AY132$*****
3EcoSmart ECO 11$$*****
4Marey GA10LP$$****
5Camplux 10L Outdoor BW264$$****
6Eccotemp FVI12-LP$$$***
7Rinnai V65iP$$$$*****
8Eccotemp i12-LP$$$***
9Suburban 5117A$$$*****
10Atwood 96110$$$*****
11PrecisionTemp RV-550$$$$$*****
12EZtankless EZ101$***
13Excel Pro$$$$***
14Suburban 5121A$$$*****
15Rinnai RU80EN$$$$$*****

Reviews on Best Tankless Water Heaters For RV

Different people tend to have different preferences so particular models could receive highly conflicting opinions. Still, in the case that you look for a good buy, it’s strongly recommended that you check out the water heaters reviewed down below.

1. Eccotemp L10 – Best Of The Best

Eccotemp L10
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  • Output: 2.6 GPM
  • Dimensions: 25.5 x 13.625 x 7 Inches
  • Weight: 27 Pounds

Why This Is The Best:

Engineered to be set up and put away in a matter of moments,  Eccotemp L10 proves to be an excellent water heater for outdoor showers. Packing manual temperature control, the Eccotemp unit allows enthusiasts of RVing to change the water temperature as they see fit. Besides that, the water pressure is adjustable as well so it’s a breeze to get a customized shower experience. Needless to say, to people that like to shower on the go, Eccotemp L10 is undoubtedly the best RV tankless water heater money can buy.

Since the water heater from Eccotemp incorporates battery-powered electric ignition, it works reliably in an assortment of camping conditions. That is going to be a major plus if you travel extensively and want a dependable supply of hot water. About the fuel, Eccotemp L10 runs on gas which means you could hook it up to standard 20-pound propane tanks. Upon purchase, the Eccotemp water heater comes with accessories such as gas regulator, gas hose, garden hose adapter and others.

To maintain safe operation, Eccotemp L10 has an automatic 20-minute shutoff timer that reset once water stops then starts again. Because of that, the model of Eccotemp possesses a sublime safety record compared to typical water heaters on the market.

We’re camping outside (RV) while work is being done on our house – We hooked this hot water heater up outside of the shed and fill a un-insulated steel tub. We’ve been using it several times a week to take a bath all through the Winter here in N California where temps around the mid 30’s are common here. The key for a super hot bath was to add a hose water restrictor to the cold water IN pipe (See pics) You can dial down the flow even more with this ‘ til the water is scolding hot. It does take 15 to 20 mins to run the bath, but oh what a treat!

Shared by James Benidorm


  • Accessories included
  • Economical and long-lasting
  • Responsive customer service


  • Adjusting knobs require strengthening
  • Battery compartment should be redesigned

2. Camplux AY132 – Editor’s Choice

Camplux AY132
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  • Output: 1.32 GPM
  • Dimensions: 11.42 x 4.33 x 14.8 Inches
  • Weight: 14 Pounds

Why It’s An Editor’s Choice:

Featuring a compact body, Camplux AY132 easily fits in a wide range of recreational vehicles. Thanks to the integration of a carrying handle, moving the water heater of Camplux from spot to spot is a walk in the park too. Being a gas model, Camplux AY132 is best used out in the open but if necessary, you could install it inside your rig assuming that the interior is well-ventilated. The Camplux unit would shut down automatically if oxygen in the surrounding drops below a predetermined level so rest assured.

Regarding installation, the setup process of Camplux AY132 is undemanding and only lasts a few minutes in the usual cases. In addition to that, similar to many of its market competitors, the model from Camplux relies on batteries for ignition so its reliability is outstanding. As Camplux AY132 also employs innovative heating technology, the operating expense tends to be reasonable. Unsurprisingly, the unit of Camplux is considered to be the best RV tankless water heater at its price range for cost-conscious enthusiasts of RVing.

About temperature and pressure, Camplux AY132 lets users apply adjustments through the knobs located at the front of the unit. Thus, everyone could have enjoyable showers while using the tankless water heater for travel trailer made by Camplux.

We live off grid in Hawaii. We use this for two sinks and a shower. It’s just my husband and I that use the hot water and we’ve used this for about 7 months now without any problems. Also, it uses very little propane and the water pressure is perfect! I’ll buy another one of these some day. Two thumbs up!!!

Shared by Jennifer Creasey


  • Affordable cost
  • Straightforward installation
  • Top-notch customization


  • Aftermarket support is less than ideal
  • Barely acceptable delivery service

3. EcoSmart ECO 11 – Editor’s Choice

EcoSmart ECO 11
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  • Output: 3.1 GPM
  • Dimensions: 11.5 x 8 x 3.75 Inches
  • Weight: 6.65 Pounds

Why It’s An Editor’s Choice:

You seek a solid electric hot water heater for campers? If that is so, you should check out EcoSmart ECO 11. Boasting the latest self-modulating technology, the model from EcoSmart would precisely regulate the energy output to ensure optimal heating. As a result, EcoSmart ECO 11 is able to help enthusiasts of RVing save energy and cut down the utility bill. Moreover, depending on the climates, the EcoSmart water heater can provide hot water to various applications at the same time.

In terms of control, EcoSmart ECO 11 utilizes an intuitive digital interface that permits users to set the temperature of water in increments of one degree. Therefore, tuning the temperature to individual liking is going to be a piece of cake. Aside from that, EcoSmart ECO 11 has a rather slim and sleek design so it frees up floor space inside recreational vehicles for more essential items. The water heater made by EcoSmart is quite light as well, hence, RVers could install and remove it at will.

So as to reassure customers, EcoSmart backs its water heater with a limited lifetime warranty. That is why if you want to have an insurance policy then EcoSmart ECO 11 would be the best RV tankless water heater you can buy.

I purchased this unit to replace a standard 50 gallon electric water heater. The price of a kilowatt hour of electricity here on the Big Island of Hawaii is .39 cents, and going to go higher. Installation was pretty straight forward with a cardboard template to mark the 3 holes required to mount the unit. I had to use reducers to get from 3/4 inch to 1/2 inch for the connection to the unit. I used the brass adapters supplied with the unit to make the connection to standard 1/2 inch stainless hose. Teflon tape is required to make sure there is no leaking from the brass adapters.

The unit says that a 50 amp breaker should be used with #6 wire. I wired the unit temporarily using the #10 (30 amp) wire that went to the original heater. The current draw with a shower and sink faucet wide open was 38 amps with an inlet water temp of 70 degrees. I ran a new circuit of #8 wire as the water temp here is never going to get lower than 70 degrees. If you live in a cold climate or have a well I am sure the current draw will be higher so the #6 wire should be used.

The temperature regulation with this unit is very stable. I have it set to 115 degrees and have no problem in the shower when a sink or dish washer comes on and demands more hot water flow.

Shared by David A Tate


  • Energy-efficient
  • User-friendly control
  • Durable and portable


  • A couple of users complain about leakage
  • The heat exchanger must be cleaned frequently

4. Marey GA10LP Tankless Water Heater

Marey GA10LP
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  • Output: 3.1 GPM
  • Dimensions: 13.6 x 23.6 x 6.9 Inches
  • Weight: 21 Pounds

Why We Love It:

Capable of delivering endless volumes of water on demand, Marey GA10LP is held in high esteem by countless RVers. Designed to run on gas, the Marey unit is deemed to be well-suited for settings that face power shortages. Even the ignition mechanism of Marey GA10LP is powered by batteries so you would never have to worry about running out of hot water. Besides that, possessing a high-quality corrosion-resistant heat exchanger, the water heater from Marey can work for a lifetime.

As Marey GA10LP happens to have a humble profile, it takes up less space than traditional RV water heaters. Thus, it should be a breeze for you to find a spot for the model from Marey on your rig without having to ditch something. Additionally, Marey GA10LP is built to be rustproof which completely eliminates the issue of water loss caused by leaks. Last but not least, the Marey water heater has combustion and gas pressure protection so it’s safe to use.

With multiple points of use, Marey GA10LP could steadily supply hot water to an assortment of applications at once. Because of that, if you have to simultaneously run many applications that require hot water, you need to add the Marey unit to your shortlist.

This is a great on demand water heater for the price. It was fairly easy to install. The hardest part was finding the right vent pieces for the spot we have it installed. It takes some fine tuning and experimentation to get the temperature settings where they need to be. It all depends on your specific plumbing system and personal preference. It does get very hot in the highest setting so it takes some adjusting to get it just right. I highly recommend this unit. So far so good!

Shared by Melissa


  • Fast shipping
  • Reliable and rugged
  • Simple setup process


  • Inconsistent operation between units
  • The manual is poorly written

5. Camplux  10L Outdoor BW264 Tankless Water Heater

Camplux  10L Outdoor BW264
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  • Output: 2.64 GPM
  • Dimensions: 12.8 x 6.1 x 21.65 Inches
  • Weight: 23.6 Pounds

Why We Love It:

By incorporating modern energy-saving technology, Camplux BW264 reduces the operating expense but still allows enthusiasts of RVing to access hot water as they need. Furthermore, the water heater from Camplux has multilayered protection so its safety level is splendid compared to the average units. Compact and light, Camplux BW264 is often held in high esteem by RVers that like to stay adaptable while traveling. Since it’s accompanied by hardware too, the Camplux model is easy to set up.

Being a gas water heater, Camplux BW264 should be used in the outdoors but with proper venting arrangements, you could put it indoors as well. The unit of Camplux integrates electronic ignition powered by batteries, therefore, its operation is stable. In use, Camplux  BW264 let the users manage the pressure and the temperature of the water through respective turn knobs. Interestingly, the water heater made by Camplux also features a gas knob that you can use to change the consumption rate bases on the climate.

As for the cost, Camplux BW264 is inexpensive so it suits the shopping budget of ordinary enthusiasts of RVing nowadays. All in all, once it comes to cost-values, the Camplux model is definitely the best RV tankless water heater.

Setup was easy. Water turned on and off with shut-off valve on the hand sprayer. Water flow lights burner. Tested and works perfectly. Water flow and temperature easy to adjust. Flow from sprayer was strong with normal hose pressure. I purchased an additional 11.5 foot sprayer hose so I could locate the water heater farther away from the where the water will be used. The unit comes with easy connect hose fittings, but the are unique. I would like to see an attachment kit so these plastic fittings can be reordered. Plastic part inevitably crack or wear out. Having more on had would be good planning. There are brass fittings from standard hose thread connections…it’s only the quick snap-on quick disconnect parts that are made of plastic. Maximum temperature reached on the front display was 140 degrees. That was with the temperature dial turned up to maximum and the water flow to minimum. This is a very efficient water heater. I plan to use this water heater for emergencies and for pool side showers in the summer.

Shared by Oh-Well-Darn


  • Nice price
  • Versatile and flexible
  • Robust construction


  • Some units arrive inoperable
  • Users report occasional leaks around the fittings

6. Eccotemp FVI12-LP Tankless Water Heater

Eccotemp FVI12-LP
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  • Output: 4.0 GPM
  • Dimensions: 24.75 x 15.25 x 6 Inches
  • Weight: 33 Pounds

Why We Love It:

Thanks to its ability to generate intense gas-fueled flame, Eccotemp FVI12-LP could instantly heat up water as it passes through the heat exchanger. Naturally, for RVers that want to get hot water in a timely manner, the model of Eccotemp is certainly the best RV tankless water heater. It’s worth noting that Eccotemp FVI12-LP is an on-demand water heater: it only runs if there is a demand for hot water. Hence, the unit from Eccotemp helps you conserve gas for other appliances in your rig.

Eccotemp FVI12-LP packs a flush digital temperature display so users should be able to tell the current temperature at a glance. To change the temperature of the water, you can use the front-mounted turn knobs to apply whatever adjustments that you see fit. In addition, as Eccotemp FVI12-LP has standard water fittings, adapting it to particular water setups would be a cakewalk. With a low noise output, the water heater made by Eccotemp guarantees a tranquil experience.

Employing a lightweight space-saving design, Eccotemp FVI12-LP could be easily stored and moved. As long as it receives gas and power for its electronic ignition system, the RV instant hot water heater from Eccotemp is going to work like a charm.


  • Fair cost
  • Quiet operation
  • Portability is marvelous


  • A few units come with missing hardware
  • Quality control still leaves things to be desired

7. Rinnai V65iP Tankless Water Heater

Rinnai V65iP
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  • Output: 6.5 GPM
  • Dimensions: 26.9 x 14.04 x 9.27 Inches
  • Weight: 45.6 Pounds

Why We Love It:

Equipped with ThermaCirc360 technology, Rinnai V65iP can recirculate hot water through the pipes and accelerate the delivery of hot water to applications. Because of that, if you keep the Rinnai water heater around, you could access hot water in a blink of an eye. Also, since  Rinnai V65iP only heats water on demand, it uses less energy than classic water heaters for RV. That means the unit of Rinnai cuts down CO2 emission as well as gas consumption.

Packing a compact design that allows installations in non-traditional locations for water heaters, Rinnai V65iP would let RV save space inside recreational vehicles. Additionally, the model from Rinnai has a basic no-nonsense digital display so enthusiasts of RVing could increase and decrease the temperature as they like. If necessary, it’s possible for users to fit a WiFi control module to Rinnai V65iP for remote control. Therefore, you don’t have to stand next to the water heater Rinnai to monitor and manipulate its operation.

One interesting thing about Rinnai V65iP is that all of its components are replaceable so if something breaks down, you can easily grab replacements.


  • Compact body
  • Control layout is convenient
  • Replaceable components


  • Require odd exhaust venting
  • Users complain about getting defective units

8. Eccotemp i12-LP Tankless Water Heater

Eccotemp i12-LP
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  • Output: 4.0 GPM
  • Dimensions: 17.00 x 29.00 x 11.00 Inches
  • Weight: 28.9 Pounds

Why We Love It:

Featuring advanced low flow ignition technology, Eccotemp i12-LP lets enthusiasts of RVing enjoy an interrupted flow of hot water. As the unit made by Eccotemp uses standard water fittings and accompanies horizontal venting, installing it is just a breeze. Instead of pilot light,  Eccotemp i12-LP utilizes electronic ignition so it could readily produce hot water all day long. Also, the model from Eccotemp is highly compact which makes it a good buy for RVers that have small rigs.

As for the user interface, Eccotemp i12-LP has a stylish black tempered glass panel that incorporates LED display controls. Through the controls, you can turn the water heater on/off, change the temperature, measure the output and so on. Eccotemp i12-LP possesses a handy child lock designed to keep the youngsters from unwittingly messing up the operation settings. So if you intend to bring your kids along while traveling then the Eccotemp unit would be the best RV tankless water heater for you.

About post-purchase support, Eccotemp i12-LP is backed with a 2-year limited manufacturer warranty. In the case that your Eccotemp tankless water heater fails due to manufacturing defects, you could claim a free replacement.


  • Sublime output
  • Sturdy and sleek
  • Excellent packaging


  • Temperature spikes occur from time to time
  • Ill-suited for camping settings with low temperatures

9.  Suburban 5117A Tankless Water Heater

Suburban 5117A
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  • Output: 6.0 GPM
  • Dimensions: 17.00 x 29.00 x 11.00 Inches
  • Weight: 28.9 Pounds

Why We Love It:

Constructed using porcelain-lined steel, Suburban 5117A could take everything that people throw at it. Even the controls are protected in a one-piece die-formed metal housing that stops outdoor elements from getting in. As a result, the water heater from Suburban is held in high esteem by full-time RVers that prioritize endurance. Besides that, since Suburban 5117A has a copolymer insulation jacket, it substantially reduces heat loss in use and allows enthusiasts of RVing to save gas.

Compared to the usual water heaters for RV on the market, the unit of Suburban boasts a fast recovery rate so it can deliver lots of hot water to the users in relatively few cycles. In terms of installation, packing a highly accessible gas line connection, Suburban 5117A is deemed very easy to set up. Thus, the Suburban model tends to be well-liked by DIY RVers that seek functional water heaters with uncomplicated installations. Suburban 5117A uses pilot light for gas ignition though, therefore, you might have to relight it every now and then.  

Regarding maintenance, RVers don’t have to pay special attention to the Suburban water heater. All you need to do is to swap the replaceable anode rod periodically to prevent  Suburban 5117A from getting rusty.


  • Long-lasting
  • Outstanding adaptability
  • Installation is undemanding


  • Leaking seems to be a persistent issue
  • A lot of users complain about receiving used units

10. Atwood 96110 Tankless Water Heater

Atwood 96110
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  • Output: 14.3 GPM
  • Dimensions: 16.5 x 12.5 x 18.0 Inches
  • Weight: 28.9 Pounds

Why We Love It:

Basic and practical, Atwood 96110 gives a good account of itself in lots of environments which is why it’s an excellent companion for off-roading. Being a gas water heater with pilot light ignition,  the Atwood unit permits enthusiasts of RVing to secure hot water even if electricity is unavailable. Once you reach the camping site, you simply need to light up the pilot light and you would have hot water after half an hour. As it also has a compact body, the Atwood unit is capable of fitting limited spaces so you could easily add it to your rig.

About installation, the setup process of Atwood 96110 is straightforward so you don’t have to be a professional mechanic in order to get it working. In addition to that, to increase resistance against elements, the access door of the model from Atwood is powder-coated. Unsurprisingly, the reliability of Atwood 96110 receives positive remarks from various RV tankless water heater reviews. The water heater made by Atwood contains a temperature switch, a thermostat and a pressure/temperature relief valve as well.

For cost, Atwood 96110 indeed seems to be expensive for an RV tankless hot water heater but the values it offers nonetheless match its price tag. Atwood backs its units with a decent 2-year warranty too.


  • Resilient
  • Consistent operation
  • Delivery service is superb


  • A bit costly
  • Occasional leakage is reported

11. PrecisionTemp RV-550 Tankless Water Heater

PrecisionTemp RV-550
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  • Output: 6.0 GPM
  • Dimensions: 13.5 x 13.5 x 14.25 Inches
  • Weight: 32.0 Pounds

Why We Love It:

Looking for a quality purpose-design RV tankless water heater? Then PrecisionTemp RV-550 is going to be what you need. Designed specifically for four-season use, the model of PrecisionTemp guarantees a constant flow of hot water around the year. Thanks to the integration of built-in freeze protection,  PrecisionTemp RV-550 would remain operational as the outside temperature drops low. Moreover, as the PrecisionTemp water heater has an electric ignition system, enthusiasts of RVing don’t have to wait too long to get hot water.

Featuring employing automatic gas modulation, PrecisionTemp RV-550 self-adjusts gas usage based on temperature as well as rate of flow. Hence, the unit made by PrecisionTemp could maintain stable temperature control which addresses issues like overheating in the summer and inadequate heating in the winter. Besides that, PrecisionTemp RV-550 happens to be an RV on demand water heater that only activates if people need hot water. So the PrecisionTemp model can help RVers cut down the utility bill and save some bucks.

Since PrecisionTemp RV-550 is rather light in its class, getting it into position should be a walk in the park. The simple setup process means virtually everyone could install the PrecisionTemp unit with common tools.


  • Dependable and reliable
  • Top-notch aftermarket support
  • Impressive temperature control


  • Quite expensive
  • Flow rate fluctuates on occasions

12. EZtankless EZ101 Tankless Water Heater

EZtankless EZ101
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  • Output: 1.6 GPM
  • Dimensions: 25 x 15 x 8 Inches
  • Weight: 14.0 Pounds

Why We Love It

Boasting fully-automatic operation, EZ101 of EZtankless can supply hot water mere moments after you turn on the shower faucet. As the ignition system of the EZtankless water heater draws power from D-cell batteries, it works like a charm in all kinds of conditions. Additionally, by incorporating robust low-pressure start-up, EZtankless EZ101 is able to work at pressure as low as 10 PSI. That is why once it comes to high-altitude camping, the unit of EZtankless is the best RV tankless water heater available for purchase nowadays.

To deliver an optimal experience, EZtankless EZ101 packs three dials that let RVers manage the numbers of burners, intensity of the flame and water flow. Because of that, it’s a breeze for you to tune the operation of the EZtankless model to your liking. As for the installation, the water inlet, the water outlet and the gas inlet all concentrate on the bottom EZtankless EZ101 so setting it up is a piece of cake. With a lightweight construction, the unit of EZtankless proves to be highly portable as well.

In terms of safety, EZtankless EZ101 has a 20-minute timer that reduces the risk of carbon monoxide poisoning in layouts with less than ideal ventilation. If the water supply is interrupted, the water heater made by EZtankless would promptly proceed to close the gas valve.  


  • Affordable
  • Splendid portability
  • User interface is intuitive


  • Weak coils
  • Limited rate of flow

13. Excel Pro Tankless Water Heater

Excel Pro
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  • Output: 6.6 GPM
  • Dimensions: 14.5 x 23 x 5.5 Inches
  • Weight: 36.0 Pounds

Why We Love It:

Being a modulated tankless water heater, Excel Pro automatically changes its heat output in response to the flow rate of water running through it. As a result, the unit of Excel is capable of maintaining temperature while optimizing gas consumption. Furthermore, Excel Pro has a user-friendly digital display that allows enthusiasts of RVing to adjust water temperature at will. So you just have set the temperature as you see fit and you can start enjoying a nice hot shower.

In order to facilitate the setup process, Excel Pro could be exhausted vertically (rooftops) as well as horizontally (wall vents). Thus, adapting the water heater from Excel to particular camping environments would be a cakewalk. Also, since Excel Pro utilizes a standard gas connection, you can quickly hook it up to the usual propane tanks. The ignition system of the Excel model is electric, therefore, its start-up sequence is considered to be pretty smooth. 

As for cost, Excel Pro appears to be costly but if you have money to spend then it’s by all accounts a good buy. It’s noteworthy that the tankless water heater made of Excel is backed with an extended manufacturer warranty as well.


  • Economical operation
  • Adaptable and tough
  • No-nonsense control


  • High-priced
  • A couple of units arrive with missing parts

14. Suburban 5121A Tankless Water Heater

Suburban 5121A
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  • Output: 6.0 GPM
  • Dimensions: 19.2 x 12.7 x 12.7 Inches
  • Weight: 35.0 Pounds

Why We Love It:

Like Suburban 5117A but want a more reliable ignition system? In that case, Suburban 5121A is the unit for you. Packing direct spark ignition, the water heater from Suburban readily provides hot water to applications. Hence, with  Suburban 5121A on your rig, you could take a hot shower whenever you want which is certainly convenient. Similar to its cousin, the model of Suburban features a rather fast recovery rate so you don’t have to worry about rapid water cycles.

Possessing a durable porcelain-lined steel body, Suburban 5121A could handle shocks and vibrations well. Moreover, thanks to the presence of a resilient housing, the controls of the Suburban units are well-guarded against elements. Naturally, regarding endurance, Suburban 5121A is widely known to be the best RV tankless water heater in its price range. Aside from that, since it has a highly accessible exterior gas line connection, the tankless water heater made by Suburban is very simple to install.

In use, Suburban 5121A is able to keep heat loss to a minimum as it comes with an insulated jacket. That is why various enthusiasts of RVing that wish to conserve gas while traveling think highly of the Suburban unit.


  • Noise level is low
  • Marvelous ruggedness
  • Good values for the cost


  • People report getting incorrectly-sized units
  • Some hardware must be bought separately  

15. Rinnai RU80EN Tankless Water Heater

Rinnai RU80EN
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  • Output: 8.0 GPM
  • Dimensions: 26.0 x 18.5 x 10 Inches
  • Weight: 70.0 Pounds

Why We Love It:

Employing a condensing design with two heat exchangers to maximize heating values, Rinnai RU80EN is deemed to be a highly capable tankless water heater. Since it has a built-in recirculation program that cycles the external pump at preset parameters, the unit made by Rinnai could optimize gas consumption and keep the noise down. Because of that, Rinnai RU80EN is economical and it operates in a silent manner. In addition, the Rinnai water heater supports multiple venting arrangements so its adaptability is excellent.

So as to reduce the risk of long-term damage, Rinnai RU80EN incorporates enhanced scale detection which is handy. A temperature lock is included as well to prevent accidental/unauthorized changes to temperature settings. Thus, the tankless water heater from Rinnai could be put to good use in a wide range of camping setups. Though Rinnai RU80EN is more expensive than the average units on the market, it’s a worthwhile purchase nevertheless.

As proof of confidence, Rinnai offers everyone that decides to pick up its water heater a splendid warranty: 5-years for part and 1-year for labor. If you like to have peace of mind, you should consider getting Rinnai RU80EN.


  • Sturdy body
  • Quiet and efficient
  • Hassle-free installation


  • Costly
  • For outdoors only

How To Find The Best RV Tankless Water

Buying on impulse would likely cause you to waste lots of money for little gains. Thus, you should keep the following considerations in mind while assessing models on the market.


In case you don’t know, BTU stands for British Thermal Unit and it’s usually used to measure the heating capacity of water heaters. That means as the BTU rating increases, more heat would be directed to the water. So as to determine the ideal BTU rating for your RV tankless water heater, it’s essential that you take aspects of traveling into account. Overall, if you don’t have special demands then you could settle for a standard water heater but if you need lots of hot water, choose a high-BTU model.


Space for the water heater often varies substantially between vehicles, hence, you must pay attention to size to grab the best RV tankless water heater. The last thing you want to do is to spend big bucks on a huge water heater that your rig is simply incapable of accommodating. As a result, it’s widely advised that you use the specifications of your rig as references and decide accordingly. That would help you narrow down your shortlist as well.


As an RVer, you likely have to take care of many issues which is why you don’t need a water heater with complicated setups. Because of that, prior to picking up a particular model, you should make sure that you could master its installation. Besides assessing water heaters directly, it’s a good idea to read customer reviews too to gain insights into the installation complexity of market models. If you have any questions, get in touch with the manufacturers to acquire reliable information.


Unless you happen to have the money to replace your water heater now and then, it’s strongly recommended that you give durability some thoughts. By taking a look at the designs, materials, finishes and so on, you can tell if the water heater you like is able to last. If you notice signs that indicate an easily compromised integrity, it’s best that you start looking for other models.


Tankless water heaters for recreational vehicles come at various costs so there are fitting models for every shopping budget. Nonetheless, before committing to a purchase, you have to remember the rule of thumb: “You get what you pay for”. While it’s unnecessary to empty your wallet just to buy expensive premium-grade water heaters, you should also stay away from dirt-cheap models. To put together a sound budget, compile a list of desired features, seek out the water heaters that match the list and compare their prices.

Types Of Tankless Water Heaters For RV

Though it seems that new tankless water heaters continue to hit the market, all models could be classified into three types: electric, gas and hybrid.  

Electric Water Heaters

As the name suggests, electric water heaters run on electricity so they could be put to good use in an assortment of recreational vehicles nowadays. Depending on individual liking, RVers can power models of the types using battery banks, generators, solar energy and so on. In addition to that, electric water heaters don’t release exhausts in use which make eco-conscious enthusiasts of RVing seek the best electric tankless water heater for RV. However, water heaters that run on electricity are expensive and they have high power consumption.

Gas Water Heaters

Reliable and dependable, gas water heaters tend to be held in high esteem by RVers that travel around the year. Also, since models of the types use gas that may be bought at low costs, they have manageable operation expenses. That being said, to safely run gas water heaters, it’s necessary to set up venting arrangements to remove the exhaust.  

Hybrid Water Heaters

high-quality your main concern? If that is the case then hybrid water heaters would be exactly what you need. Designed to run on electricity as well as gas, models of the type allow enthusiasts of RVing to casually enjoy hot water at all times. Nevertheless, once it comes to available options, hybrid water heaters fall behind other heater types.

Premier Brands Of RV Tankless Water Heaters

It’s safe to say that the brand of a water heater has rather negligible influences on its actual performance. Nonetheless, it’s strongly recommended that you prioritize models made by the manufacturers down below.


Founded back in 1920, Rinnai is deemed to be one of the leading brands once it comes to tankless water heaters. Models from Rinnai receive a shower of praise from RVers, novices as well as veterans.


Able to build robust appliances that work reliably for many years, Suburban is respected by RV communities around the globe. If you wish to pick up a tankless water heater for camper that holds together, Suburban has excellent options for you.


Being a long-established name in the RV industry, Dometic releases plenty of high-quality appliances including tankless water heaters. Unsurprisingly, Dometic is the all-time favorite of enthusiasts of RVing that seek solid products.


Based in Miami, Florida, Excel focuses on flexible gas piping systems but it also makes outstanding tankless gas water heaters. Looking for a good water heater that runs on gas? If that is so, you should consider buying from Excel.  


Known for incorporating quality materials and modern technologies into its products, Takagi never fails to meet the expectations of consumers. In addition, strict quality control means only the best water heaters could leave the factory.

FAQs About RV Tankless Water Heaters

Do I have to clean my water heater?

To prevent the accumulation and growth of bacteria, you must clean your water heater periodically. Different water heaters have different cleaning requirements so it’s suggested that you follow instructions in the user’s manual. The average water heaters could be cleaned with some white vinegar but a couple of models accept cleaning solutions too.

Is it possible to install a water heater under the RV sink?

Yes, you can install a water heater under your sink if you want to get hot water in an instant. Still, as a precaution, you have to check out the user’s manual to learn what needs to be done.

How come my water heater only lets out lukewarm water?

In that situation, it’s widely advised that you go take a look at the hot and cold faucets outside of the shower/water line. If the faucets happen to be on then hot and cold water could mix together.

Can I change from a tank water heater to a tankless one?

In general, changing from a tank water heater to a tankless one is quite simple assuming that you have a well-thought plan in mind. Usually, you have to gather tools, set up mounts, arrange power cables and so on. In the case that you don’t have confidence, it would be wise to hire professionals to handle the conversion.

What kinds of maintenance do tankless water heaters need?

All in all, tankless water heaters for RV prove to be a breeze to maintain. So as to keep your water heater in top shape, you should inspect the anode rod from time to time. For your information, the anode rod is designed to sacrifice itself to protect a water heater from rust in use. That means if the anode rod is severely damaged, your water heater will be vulnerable to corrosion. Moreover, it’s essential that you drain the water tank of your rig before putting it into storage.

You can also find our guides on how to choose the best RV shower head, best RV water hose, best RV water pressure regulator, and best RV water pump with detailed reviews in RV Freshwater Systems category. In these reviews, we only include and recommend the best products with the highest ratings among highly sold products on the market.

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