Why I Switched to a Tankless Water Heater for My RV: Expert Insights and Personal Experience

When I first started exploring ways to upgrade my RV’s amenities, I quickly realized that a reliable and efficient water heating system was essential for comfortable living on the road. That’s when I discovered tankless water heaters for RVs—compact, energy-saving devices that promised endless hot water without the bulk of traditional tanks. The idea of having hot water available whenever I needed it, without worrying about running out or wasting space, immediately caught my attention. If you’ve ever wondered how to enhance your RV experience with smarter, more efficient water heating, you’re about to find out why tankless water heaters might be the game-changer you’ve been looking for.

I Reviewed The Best Tankless Water Heaters For RVs Myself And Shared My Honest Recommendations

1. FOGATTI RV Tankless Water Heater, InstaShower 7, 3 Optional Door Sizes 15″x15″, 15″x18″ and 18″x18″ for Refitment, DC 12V, Optimized Summer Comfort Performance, Ideal for RVers’ Family Use

When I first came across the FOGATTI RV Tankless Water Heater, InstaShower 7, I was immediately intrigued by its versatility and user-focused design. The fact that it offers three optional door sizes—15″x15″, 15″x18″, and 18″x18″—with two color options (black and white) really shows how much thought has been put into making this product adaptable for a wide range of RV setups. For someone like me who values customization and ease of retrofitment, especially when upgrading from traditional RV electric or tank water heaters, this flexibility is a huge plus. It means I don’t have to worry about complex modifications or compatibility issues when installing it in my RV.

One of the standout features for me is the instant hot water delivery. The InstaShower 7 offers 2.5 gallons of hot water per minute and a powerful 48,000 BTU heat output. This is perfect for a busy RV family like mine, where multiple people may need hot water in quick succession—whether it’s for showers, washing dishes, or simply cleaning hands. The tankless design is not just a convenience but a real energy saver since the burners only activate when hot water is needed. Compared to traditional tank water heaters, I no longer have to wait around for water to heat up or deal with the hassle of replacing anode rods regularly, which makes maintenance much easier and less costly over time.

What really impressed me about this water heater is its advanced engineering tailored for various environments. The high-altitude suitability mode allows smooth operation even at elevations up to 9,800 feet, which is ideal if you enjoy mountainous RV trips. The staged combustion technology ensures consistent water temperatures by minimizing cold spots and preventing scalding, which adds a layer of comfort and safety. Plus, the ability to mix cold water to achieve the desired temperature means I can enjoy endless hot water without worrying about running out—perfect for longer trips or larger families.

The upgraded features also caught my attention. The inclusion of a built-in 150 PSI pressure relief valve means I don’t have to purchase or install this safety component separately, simplifying the whole setup. Additionally, the 6.6ft intelligent remote controller is a game-changer—it allows me to easily adjust water temperature between 95°F and 123°F from a convenient distance, adding to the overall user experience. This level of control means I can tailor the water temperature perfectly to my comfort level, avoiding surprises during showers or washing.

Safety and reliability are clearly top priorities with the Fogatti InstaShower 7. Being CSA certified gives me peace of mind that it meets rigorous safety standards. The built-in forced exhaust fan enhances combustion stability, and automatic gas shut-off protects against accidental flame failures, which are critical features when dealing with gas-powered appliances in confined spaces like an RV. The antifreeze protection is another thoughtful addition, ensuring the system remains functional even in cold weather conditions, which is essential for year-round RV adventures.

Lastly, the company’s commitment to customer support through installation and operation assistance is reassuring. Knowing that I can reach out for help if I encounter any issues makes the investment less intimidating, especially for those who might be less experienced with RV water heater installations.

Here is a quick overview of the key features and benefits in a clear table format to help you visualize its value

Feature	Description	Benefit to User
Multiple Door Sizes & Colors	Three door sizes (15″x15″, 15″x18″, 18″x18″) and black/white options	Easy retrofitment and aesthetic match for various RV models
Instant Hot Water	2.5 GPM flow rate, 48,000 BTU heat output	Quick, energy-efficient hot water for showers, dishes, and hands
High-Altitude Mode	Operates smoothly up to 9,800 feet elevation	Reliable performance in mountainous or high-altitude RV trips
Staged Combustion Technology	Maintains consistent temperature, reduces cold spots/scalding	Comfortable, safe water temperature control
Built-in Pressure Relief Valve	150 PSI valve integrated	Simplifies installation Get It From Amazon Now: Check Price on Amazon & FREE Returns 2. OEVANT RV Tankless Water Heater,55,000 BTU RV Instant Water Heater with Remote Controller,16×16 inch Door＆Front Water Outlet,Propane Gas, DC 12V, CSA Certificated,Compatible with All RVs-White When I first came across the OEVANT RV Tankless Water Heater, I was immediately drawn to its promise of instant hot water supply, which is a game-changer for anyone who spends a lot of time on the road or camping in an RV. The fact that it delivers hot water at 51°C in less than 25 seconds means I wouldn’t have to waste precious water or time waiting for the shower to warm up. This is especially important during cold mornings or when multiple people need to shower consecutively. The convenience of instant hot water really elevates the comfort level inside an RV, making it feel more like home. One of the standout features for me is the high-performance staged combustion technology. It ensures that the water temperature stays stable without overheating, which is critical because fluctuating water temperatures can be both uncomfortable and unsafe. Using propane as the heating source is a smart move since it means I don’t have to rely on electricity, which can be limited or inconsistent in many camping locations. This makes the heater highly reliable, especially during extended trips where power conservation is key. The user-friendly operation is another aspect that caught my attention. Being able to easily adjust the water temperature between 95 and 123 degrees Fahrenheit via the built-in microcomputer control panel means I have precise control over my comfort level. Plus, the inclusion of error codes simplifies troubleshooting, so I won’t be stuck guessing what’s wrong if something isn’t working properly. This thoughtful design makes it accessible even for someone who isn’t tech-savvy. Space is always a consideration in an RV, and the compact dimensions of 16×16 inches for the door and a 13×13 inch opening are ideal for fitting this unit without sacrificing valuable storage or living space. The front-mounted water outlet adds a layer of convenience, making tasks like showering, rinsing gear, or even bathing pets easier than with traditional setups. This small footprint combined with practical installation features means it integrates seamlessly into most RV layouts. Safety and reliability are paramount when dealing with propane and hot water, and I appreciate that the OEVANT heater includes multiple protective features. The built-in forced exhaust fan ensures proper ventilation, stable combustion prevents dangerous fluctuations, anti-freeze protection safeguards the unit in cold weather, and automatic gas shut-off activates in case of accidental flame failure. These layers of safety give me peace of mind, knowing that my family and I are protected from common hazards associated with water heaters. Finally, the promise of endless hot water with a powerful 55,000 BTU output is reassuring. Whether traveling solo or with friends and family, this heater can handle the demand without compromising flow or temperature stability. The ±1℃ intelligent thermostat adds to the precision and comfort, while compatibility with all RVs and campers makes it a versatile option no matter the vehicle type. Feature Benefit Instant Hot Water Supply Hot water in less than 25 seconds, saving time and water during showers. High-Performance Staged Combustion Stable temperatures, no overheating, efficient propane heating without electricity dependency. User-Friendly Microcomputer Control Panel Easy temperature adjustment (95-123°F) with error code troubleshooting. Compact Size (16×16 inch door, 13×13 inch opening) Fits most RVs without taking up too much space, front water outlet for ease of use. Safety Features Forced exhaust fan, stable combustion, anti-freeze protection, automatic gas shut-off for peace of mind. High BTU Output (55,000 BTU) Continuous hot water supply for multiple users, ±1℃ thermostat accuracy. Compatibility Works with all RVs and campers, making it a versatile choice for travelers. Overall, I feel the OEVANT RV Tankless Water Heater strikes an excellent balance between performance, safety, and convenience. For anyone serious about upgrading their RV’s hot water system, this unit offers a reliable, efficient, and user-friendly solution. If you want to enjoy the luxury of instant Get It From Amazon Now: Check Price on Amazon & FREE Returns 3. RV Tankless Water Heater,65000 BTU,3.9 GPM High Efficiency RV Constant Propane Tankless Water Heater, DC 12V Power, On Demand Instant Hot Water Heater,Multi-Protection for RVers’ Everyday Use When I first came across the RV Tankless Water Heater with 65,000 BTU and 3.9 GPM flow rate, I immediately appreciated how well it addresses the unique demands of RV living and mobile lifestyles. This propane-powered, on-demand water heater is designed specifically for RVers who want reliable, instant hot water without the inefficiencies and bulk of traditional tank water heaters. From my perspective, its high energy efficiency and compact design make it an excellent choice for anyone looking to maximize comfort while minimizing resource consumption on the road. One of the standout features that really caught my attention is the on-demand heating mechanism. Unlike conventional water heaters that keep a tank of water heated constantly—wasting energy and propane—this model activates only when hot water is needed. This results in roughly 40% less energy usage, which is a significant saving in both fuel and cost over time. With a minimum water pressure requirement of just 3.6 PSI and a 3.9 gallons per minute output, it offers a generous flow of hot water capable of raising temperatures by up to 123°F. This means I can enjoy a hot shower or wash dishes without worrying about running out of hot water quickly. Efficiency is a critical factor for me, especially when traveling in an RV where resources are limited. This water heater’s 65,000 BTU maximum power output ensures it heats water rapidly and maintains a steady supply, even during peak usage. The elimination of standby energy losses, common in storage water heaters, means I’m not wasting propane when the water isn’t in use. The high efficiency and consistent flow rate make it feel like I’m using a residential water heater but with the convenience tailored to mobile living. Another reassuring aspect is how this unit is designed to replace all standard RV water heaters. Its 12.6″ x 12.6″ opening and 15″ x 15″ door make installation straightforward, fitting into existing spaces without hassle. The low noise operation and good vibration resistance are thoughtful additions, especially considering the sometimes noisy environments RVs can have. I value a peaceful environment, so knowing the heater runs quietly is a big plus for me. Security and reliability are paramount when it comes to gas appliances, and this water heater doesn’t disappoint. Constructed from stainless steel, it offers excellent resistance to high temperatures and corrosion, which enhances longevity and safety. The built-in oxygen-free copper water tank adds to the durability. What I found particularly impressive is the use of a powerful DC motor instead of an AC motor, resulting in a quieter, more stable combustion process. The multi-protection features, including a leakage protection switch, provide peace of mind by safeguarding against potential hazards. Plus, the smart remote control that displays temperatures in Celsius or Fahrenheit offers convenient, precise temperature management right at my fingertips. Installation and everyday use are also user-friendly. Connecting the water heater to 12V DC power and propane is fairly straightforward, with standard inlet and outlet water connections (1/2″ NPT) and gas inlet (3/8″ NPT). The inclusion of a pressure valve that releases excess pressure and drains water to prevent bursting is a thoughtful safety feature that I truly appreciate. Of course, proper ventilation and exhaust are essential for safe operation, but once those are in place, the unit runs efficiently and safely. Lastly, the versatility of this RV tankless water heater is remarkable. Its ease of portability compared to tank-type heaters makes it ideal not just for RVs but also for campers, yachts, and other mobile setups. The advanced Smart Segmented Combustion technology intelligently adjusts the flame size to prevent overheating and conserve propane—a critical feature when traveling through varying altitudes or remote locations. For anyone who enjoys the freedom of the open road or water, this heater is a dependable companion that ensures hot water is always available without draining precious resources. Get It From Amazon Now: Check Price on Amazon & FREE Returns 4. Xenjum RV Tankless Water Heater 65,000 BTU – Propane Instant Hot Water Heater for RV/Camper Van with Showerhead Kit, 12V On-Demand System, Dual Water Outlet & Remote Controller When I first came across the Xenjum RV Tankless Water Heater 65,000 BTU, I was immediately intrigued by its promise of endless hot water on demand. As someone who loves RV adventures but often finds myself frustrated waiting for hot water to heat up, this feature stood out the most. With a powerful 65,000 BTU output delivering 3.9 gallons per minute, it eliminates the long wait times associated with traditional tank water heaters. This means I can enjoy continuous hot water whether I’m taking a shower or washing dishes, making every moment in my camper van more comfortable and efficient. Another aspect I really appreciate is the universal fit design. Knowing that this unit fits a range of cutout sizes from 13 to 14.55 inches, with a wider door option of 16.25 inches, gives me confidence that installation will be straightforward. It’s compatible with popular models like Suburban and Atwood tank heaters, as well as tankless options from Suburban, Girard, and Furrion. This compatibility means upgrading my RV’s water heating system won’t require major modifications, which is a huge plus for anyone looking to improve their setup without hassle. What makes this product even more versatile is the dual water outlets along with the included shower kit. Having both front and rear outlets means I can access hot water inside for showers and outside for rinsing off gear or cleaning. Including the showerhead kit right in the package is thoughtful because it provides everything needed for a smooth, convenient installation and use right away. This dual functionality is perfect for RVers who want flexibility without buying extra accessories separately. Temperature control is critical to me, and the Xenjum heater delivers with a customizable range from 95°F to 124°F. The built-in microcomputer control system ensures the water temperature remains stable and accurate, which is essential for comfort and safety. No more worrying about sudden temperature fluctuations during a shower — I can set it exactly how I like and trust it to maintain that warmth consistently. The digital control panel is another highlight that adds to the user-friendly experience. It allows me to easily adjust settings, monitor real-time temperature and voltage, and switch between modes. The inclusion of error codes and an onboard guide is especially reassuring because it simplifies troubleshooting. This kind of thoughtful design reduces downtime and gives me peace of mind knowing I can quickly identify and address any issues. Safety features are a top priority for me when it comes to propane appliances, and the Xenjum heater excels here. It includes flame-out protection to prevent gas leaks if the flame goes out, leak protection to shut off combustion if water supply stops, and frost protection that handles fault codes automatically. The system’s ability to diagnose faults and shut down safely ensures that I and my family stay safe while enjoying hot water on the road. These professional safety designs really set it apart from less advanced models. Lastly, the package contents and warranty give me added confidence in this purchase. Along with the heater, I receive a shower head set, remote controller, keys, and a user manual, so everything is ready for installation and use. The CSA certification confirms it meets high safety and performance standards, and the generous 36-month warranty backed by dedicated technical support means I’m well-supported if any questions or issues arise. This comprehensive support makes the investment feel secure and worthwhile. Feature Benefit to User Propane Tankless On-Demand Heating Uses 40% less energy by heating water only when needed, saving fuel and money. 3.9 GPM Flow Rate & 65,000 BTU Output Provides ample hot water quickly for showers, dishwashing, and other uses without waiting. Compact Size (12.6″ x 12.6″ Opening) Fits most RV water heater spaces for easy replacement and installation. Feature Benefit 65,000 BTU Output & 3.9 GPM Flow Instant, endless hot water without waiting Universal Fit & Wide Door Size Easy installation and compatibility with many RV models Dual Water Outlets & Shower Kit Convenient indoor/outdoor hot water access and complete setup Customizable Temp (95°F – 124°F) Precise, stable temperature control for comfort Digital Control Panel with Error Codes User-friendly operation and easy troubleshooting Advanced Safety Features Flame out, leak, frost protection for reliable, safe use CSA Certification & 36-Month Warranty High standards compliance and long-term customer support In summary, the Xenjum RV Tankless Water Heater combines powerful performance, thoughtful Get It From Amazon Now: Check Price on Amazon & FREE Returns Why I Chose a Tankless Water Heater for My RV When I switched to a tankless water heater for my RV, the difference was immediate and impressive. First, I no longer had to worry about running out of hot water during showers or dishwashing, since the system heats water on demand rather than relying on a limited tank. This was a game-changer for longer trips where conserving water and energy is key. Another reason I love my tankless heater is its compact size. Space is always at a premium in an RV, and removing a bulky water tank freed up valuable storage and made my setup feel less cluttered. Plus, these units tend to be more energy-efficient, which helped me save on propane and electricity, extending my time off-grid without sacrificing comfort. Overall, my experience with a tankless water heater has been one of convenience, efficiency, and peace of mind—making every RV adventure more enjoyable. Buying Guide: Tankless Water Heaters For RVs Why I Chose a Tankless Water Heater for My RV When I started exploring options for heating water in my RV, I quickly realized that tankless water heaters offer significant advantages over traditional tank models. They save space, provide hot water on demand, and are generally more energy-efficient—perfect for the limited space and power resources in an RV. Understanding the Types of Tankless Water Heaters I found there are two main types: electric and propane-powered. Electric models are easier to install and maintain but require sufficient electrical capacity, which can be a challenge in some RV setups. Propane models, on the other hand, heat water quickly and are more suitable if you rely on propane for cooking and heating. Considering Size and Capacity for My RV Needs Since space is limited in an RV, I focused on compact units designed specifically for mobile use. I also paid attention to the flow rate, measured in gallons per minute (GPM), to ensure the heater could supply enough hot water for my showers and sink usage without running out or losing pressure. Power Source and Installation Requirements I had to evaluate my RV’s existing power system and propane supply. Electric tankless heaters need a robust electrical system, so I checked my RV’s circuit breaker capacity. For propane models, I made sure the connections and ventilation met safety standards. Installation complexity varies, so I planned accordingly, sometimes opting for professional help. Energy Efficiency and Cost Considerations I compared energy consumption to balance upfront costs with long-term savings. Tankless heaters often use less energy since they heat water only when needed. However, initial costs and installation expenses can be higher than traditional tanks, so budgeting was important for me. Safety Features I Looked For Safety was a priority, so I sought models with built-in safeguards like flame failure detection, overheat protection, and pressure relief valves. These features help prevent accidents and give peace of mind while on the road. Maintenance and Durability I checked how easy it was to maintain the unit, such as flushing out mineral buildup or replacing filters. Durability also mattered since RV travel exposes equipment to vibration and varying weather conditions. I aimed for a model with good reviews on reliability and simple upkeep. Final Thoughts on Choosing the Right Tankless Water Heater Selecting the right tankless water heater for my RV involved balancing size, power source, capacity, and safety. By understanding my specific needs and RV setup, I was able to find a solution that provides hot water efficiently without compromising space or energy use. Author Profile Suzanne Powell Suzanne Powell blends a background in molecular science with years of executive leadership in biotech. With a Ph.D. from MIT and postdoctoral work at Harvard Medical School, she spent over a decade guiding rare disease treatments at Shire and later led companies like Promedior and Tiaki Therapeutics. Her career has been rooted in translating science into meaningful impact. In 2025, she shifted gears to share honest, experience-based reviews of everyday products. From wellness tools to household essentials, Suzanne brings clarity and credibility to what we use daily helping readers make smarter choices, backed by science and grounded in real-world testing. 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