5 Best RV Tankless Water Heaters: Top Models for Endless Hot Water on the Road

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Water heaters are a fundamental component of any recreational vehicle (RV) for those who love the open road but don’t want to leave the comforts of home behind. Warm, accessible water on the go is not just a luxury; it’s a necessity for cooking, cleaning, and personal hygiene. Among the various types of RV water heaters, the tankless variety has surged in popularity. These devices provide hot water on demand, eliminating the need for a storage tank and the energy losses associated with keeping a large volume of water heated at all times.

Jump to our top pick for Best RV Tankless Water Heater

After thorough research and analysis, we have narrowed down a selection of tankless water heaters that stand out in terms of performance, ease of use, and customer satisfaction, ensuring that your adventure doesn’t mean sacrificing the comfort of endless hot water.

Best RV Tankless Water Heater Picks

RecPro RV Tankless Heater

RecPro RV Tankless Hot Water Heater

We think the RecPro RV Tankless Water Heater is a worthwhile upgrade for continuous hot water during your travels.


  • Instant, endless hot water supply
  • Air safety features for peace of mind
  • Operates well even with low water pressure


  • May require professional installation
  • Larger upfront cost compared to traditional units
  • Not a drop-in replacement, some modification may be necessary

We’ve recently updated our RV with the RecPro Tankless Water Heater and the comfort of having continuous hot water cannot be overstated. Showers are now a rejuvenating experience, no longer overshadowed by the dread of cold water.

Installation was straightforward, albeit it took a couple of hours. We recommend hiring a specialist if you’re not confident with gas and electrical work. Once fitted and fired up, the water heater operated flawlessly. It’s incredible not to have to wait for the water to warm up anymore.

We must mention the air safety features, which are a significant plus. They ensure that the heater operates cleanly, a reassuring thought when you’re living in close quarters with your water heating system. Additionally, the low water pressure startup ensures the heater is versatile enough to perform in various conditions.

On the downside, you should be prepared to invest not just in the unit but potentially in its installation. Moreover, if you’re switching from a traditional water tank to this tankless model, some fitting tweaks might be necessary—it’s not always a simple swap. Despite these minor hurdles, the benefits significantly outweigh the cons.

Girard On-Demand RV Water Heater

rv tankless water heater

We found the Girard tankless water heater to be an excellent addition to our RV, offering endless hot water with simple, user-friendly controls.


  • Impressive consistent heat output
  • User-friendly digital controls
  • Straightforward installation process


  • May struggle with extremely cold inlet water
  • Potential for brief delay in hot water delivery
  • Freezing weather may require added precautions

Recently, we had the opportunity to switch to a Girard tankless water heater in our RV, and the experience has been a game-changer. The consistent and on-demand hot water made morning showers and washing dishes a much more pleasant task, and it seemed to do so with impressive efficiency.

The installation was less daunting than we expected. The unit fit perfectly into the existing water heater cutout, and there was no need for complicated plumbing adjustments. Its digital control panel was intuitive, allowing us to easily set and monitor the water temperature according to our preference, which was especially helpful for making quick adjustments.

One thing we noticed was that during the colder months, when the inlet water temperature dropped significantly, the heater took a bit longer to reach the desired heat. This wasn’t a dealbreaker, but it’s something to keep in mind for those chilly mornings. Additionally, there was a slight delay before the hot water flowed, but once it started, the pressure was satisfactory.

We also appreciated that even in freezing conditions, the Girard water heater’s freeze protection kicked in to prevent any damage. However, it’s essential to remember to take extra precautions when the mercury plummets to ensure the unit continues to operate smoothly.

All in all, for those of us living or vacationing in our RVs, the Girard tankless RV water heater can be a reliable and efficient source of hot water, making it a worthy investment for our on-the-road home comforts.

FOGATTI InstaShower 8 Plus

FOGATTI RV Tankless Water Heater

After our most recent road trip, we’re convinced anyone looking for reliable and continuous hot water in their RV should consider the FOGATTI InstaShower 8 Plus due to its high performance even at high altitudes.


  • Replaces traditional tank heaters easily, fitting into existing cutouts.
  • Supplies a steady stream of hot water, minimizing wait time.
  • Comes with a built-in pressure relief valve, saving additional costs.


  • Requires adapting for larger tank replacement with an 18×18 inches door.
  • Installation might be challenging for those new to RV modifications.
  • Limited to propane use, which could be a constraint for some.

Our old 6-gallon tank heater stood no chance against the FOGATTI InstaShower 8 Plus. The upgrade was a breeze, fitting perfectly in the existing space, and the included door finished the look. We saw a significant improvement in hot water supply, with showers turning from a rushed affair into a relaxing experience, even when we made stops high in the mountains.

Surprisingly, our propane consumption didn’t skyrocket, thanks to the FOGATTI’s efficient use of fuel. The remote control feature added a touch of modern convenience, letting us adjust the water temperature from anywhere inside the RV.

Nevertheless, we did our homework before purchasing to ensure compatibility with our RV setup. The install might be daunting for some, considering the need for a larger door if you’re switching from a 10-gallon tank, so measure your space carefully. Even though it’s propane-powered, we found this to be a minor limitation, as the benefits of on-demand hot water heavily outweighed it.

To sum it up, the FOGATTI InstaShower 8 Plus has quickly become an indispensable part of our RV life. It ensures we have hot water whenever we need it, without the long waits and without the fear of sudden cold spurts – a true game-changer for any RVer.

KINGRVER Tankless Water Heater

KINGRVER Tankless Water Heater

Our showers have been revolutionized by the immediate and endless hot water supply this KINGRVER model offers, making it a game-changer for our RV travels.


  • Non-stop hot water supply
  • Energy-efficient, only heats water on demand
  • User-friendly with intelligent temperature control


  • Initial installation might require some effort
  • May have customer service issues based on some reviews
  • Not the highest rated option available

We couldn’t be happier with the convenience of on-demand hot water during our road adventures. This heater kicks in swiftly, providing a seamless flow of hot water just seconds after the tap is turned on—a striking difference compared to the long waits we used to endure with traditional tank heaters.

The intelligence behind its system is commendable. The heater self-monitors to ensure we’re graced with a consistent and comfortable temperature—no more cold surprises mid-shower. It’s a smart addition to our RV that hasn’t gone unnoticed, particularly during consecutive showers when its value truly shines.

Adapting the KINGRVER heater to our RV was a breeze due to its wide compatibility. It’s designed to fit in place of several standard sizes, which spared us from making modifications. Every shower since has felt like an upgrade to our lifestyle on the road. While the installation took a bit of elbow grease, the subsequent ease and efficiency were well worth the effort.

Switching to this tankless system not only provided us with comfort but also peace of mind, knowing we’re conserving energy by heating water only when needed. This intelligent water heating solution has indeed become an indispensable part of our RV living.

RUINOPAR Portable Water Heater

RUINOPAR Tankless Water Heater

We find this RUINOPAR unit to be a reliable and convenient solution for hot water needs, whether you’re outdoors or lacking space.


  • Instant and endless hot water with low water pressure activation
  • Comprehensive safety features including flame-out and anti-freeze protections
  • Energy-efficient with automatic ignition and flameout emissions saving


  • Sensitive temperature controls require careful adjustment
  • Requires proper installation to prevent gas leakage
  • Limited to outdoor or well-ventilated installations due to propane use

When we hooked up the RUINOPAR Portable Water Heater, the first thing we noticed was the convenience of having hot water on demand. The installation process was straightforward, and activating the unit under low water pressure was impressively smooth. As we turned on the tap, the heater sprang to life almost instantly, providing a steady stream of warm water just as promised.

Safety is a primary concern with any gas-powered appliance, and this heater didn’t disappoint. Its numerous protection methods gave us peace of mind. The anti-freeze protection is particularly noteworthy, ensuring the unit remains safe during colder months. We also appreciated the energy savings from the automatic ignition feature, which ignited and extinguished the burner in tune with the water flow from our shower nozzle.

Though the heater operates well, we did have to finesse the temperature settings quite a bit to achieve the perfect shower temperature, as the controls were extremely sensitive. Moreover, being vigilant about checking for gas leaks before use is crucial for safe operation. But once we had it dialed in, the performance was smooth and consistent. Remember, this durability and portability make it ideal for outdoor activities like camping or rinsing off at the beach.

Buying Guide

Understanding Capacity

When choosing a tankless water heater for your RV, capacity is crucial. We consider the number of people using hot water and our consumption habits. Look for gallons-per-minute (GPM) ratings that match our needs.

Energy Efficiency

We are mindful of energy efficiency. The energy factor (EF) rating indicates how well the unit converts energy into heat. Higher EF means better efficiency and cost savings in the long run.

Installation Space

We assess our RV space to ensure the unit fits. Tankless heaters save space, but dimensions and venting requirements must be checked.

Climate Adaptability

Our choice depends on our travel destinations and the climates we’ll encounter. A heater that’s effective in various weather conditions ensures consistent performance.

Features to Consider:

Digital DisplaysFor easier monitoring
Temperature ControlsTo adjust hot water precisely
Antifreeze TechnologyFor cold climates
Water Flow RateSufficient for our usage

Reliability and Maintenance

We look for models known for durability and ease of maintenance. Routine upkeep should be straightforward to prevent inconvenience down the road.

By carefully considering these factors, we ensure we choose the best tankless water heater for our RVing needs.

Frequently Asked Questions

When selecting the best tankless water heater for your RV, it’s essential to consider a variety of factors for optimal performance and reliability. We’ve compiled a list of the most common questions RV owners have about tankless water heaters.

What factors should be considered when selecting a tankless water heater for an RV?

To ensure the right selection, we focus on the heating capacity, energy efficiency, size and weight considerations, fuel type (propane, electric, or diesel), and the ease of installation and use. It’s important to match the unit to the specific needs of your RV for water usage.

How do tankless water heaters perform in an RV compared to traditional water heaters?

Tankless water heaters in an RV provide hot water on demand without the need for a storage tank, offering a continuous supply of hot water. This contrasts with traditional water heaters, which can run out of hot water once the storage tank is depleted.

What are the most reliable brands of tankless water heaters suitable for RV use?

Brands like Girard, Atwood, and Eccotemp are known for producing reliable tankless water heaters for RVs. These manufacturers have a strong track record for durability and performance in a variety of RV settings.

Are there any advantages to using an electric tankless water heater in an RV?

Electric tankless water heaters are generally more compact and easier to install than their gas counterparts, making them a practical choice for RVs with limited space. They also eliminate the need for venting and combustion air supply, simplifying the installation process

Can you provide insights on the longevity and maintenance requirements of RV tankless water heaters?

Tankless water heaters for RVs usually last longer than traditional units, often up to 20 years with proper maintenance. Regular descaling and cleaning of the water filter are critical to uphold performance and prolong the lifespan of the unit.

What are the latest technological advancements in tankless water heater models for RVs?

Recent models of RV tankless water heaters have integrated features such as digital temperature controls, energy-efficient designs that reduce fuel consumption, and advanced venting systems for improved safety. Energy Star certification is also available for some models, indicating superior energy efficiency.

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Tyler Schnelli
Tyler grew up camping with his family every summer. From tent camping in the woods, to van camping across America, Tyler and his family loved spending time together in the outdoors. When he got older, Tyler spent time camping on his own and backpacking with friends around California. He is now entering a phase in life of introducing his kids to camping and loving every minute of it.