10 Best Tankless Hot Water Heaters for RVs: Expert Recommendations
Upgrading to a tankless hot water heater for your RV is a game-changer. It means endless hot showers, less space taken up, and more efficient energy use. But with so many options out there, finding the right one can be tricky. That’s why we’ve done the hard work for you. We’ve tested and researched to bring you this list of the top 7 best tankless hot water heaters for RVs. Whether you need a powerful unit for high altitudes or a budget-friendly pick, our guide will help you make the perfect choice for your home on wheels.
Quick Product Comparison
Our Top 10 Top 7 Best Tankless Hot Water Heaters For Rvs Reviews – Expert Tested & Recommended
1. FOGATTI InstaShower 7 RV Tankless Water Heater with DC 12V and Multiple Door Sizes
The FOGATTI InstaShower 7 is a top-tier RV tankless water heater that balances power and versatility. It delivers instant hot water on demand, freeing you from the limits of a traditional tank. With its high-altitude mode and multiple door color options, it’s designed to fit almost any RV setup seamlessly.
Key Features That Stand Out
- ✓ Replaces All RV Water Heaters: Comes with multiple door options (black and white) to easily refit existing electric or tank RV water heaters.
- ✓ Instant 2.5 GPM Hot Water: Delivers 48,000 BTU for reliable, on-demand hot water, perfect for showering in your RV.
- ✓ High-Altitude Performance: Staged combustion technology allows it to run smoothly up to 9,800 feet.
- ✓ Safety First: Includes anti-scald protection to prevent burns and ensure safe operation.
Why We Recommend It
We picked this as our Best Choice because it just works. It solves the classic RV problem of running out of hot water. The installation is straightforward for most DIYers, and its ability to perform at high elevations makes it perfect for mountain camping trips.
Best For
RV owners looking for a reliable, direct replacement for their old water heater who frequently camp in high-altitude areas.
Pros and Cons
Pros:
- Easy, direct replacement for most existing RV water heaters.
- Excellent performance at high altitudes.
- Provides instant, endless hot water.
- Well-reviewed for simple installation.
Cons:
- May require minor adjustments for a perfect fit in some RVs.
- Relies on propane, so you need to monitor your tank level.
Customer Reviews
“I’ll never own another RV without one of these. Camping with my wife and two daughters meant no warm showers for me. Problem solved. This tankless heater was extremely easy to install, It fit in the existing hole from the old unit. Included directions were easy to follow with no issues. After connecting everything, it worked perfectly.”
“Fogatti, where have you been all my RV life? This thing is awesome, easy install and works great! No more fast showers, now I can relax in the shower. Great product !!!!”
2. Rheem High Efficiency Indoor Tankless Liquid Propane Water Heater with 7.0 GPM and 160,000 BTUs
For larger RVs or those seeking serious, whole-coach hot water power, the Rheem indoor propane model is a powerhouse. This isn’t just an RV unit; it’s residential-grade technology scaled for demanding mobile use. It delivers a massive 7.0 gallons per minute, ensuring you’ll never run out of hot water.
Key Features That Stand Out
- ✓ High 7.0 GPM Flow Rate: Exceptional output perfect for larger RVs or running multiple fixtures.
- ✓ Powerful 160,000 BTU: Heats water quickly and reliably, even with a cold groundwater supply.
- ✓ Designed for Indoor Installation: Compact metal cabinet fits in utility spaces, protected from the elements.
- ✓ High Efficiency: Saves on propane consumption compared to less efficient tank heaters.
Why We Recommend It
It’s our Editor’s Choice for pure, unbridled performance. If you have a big Class A motorhome or frequently travel with a group, this Rheem heater provides a “home-like” hot water experience. The build quality from a trusted brand like Rheem also offers great peace of mind.
Best For
Owners of large Class A or Class C motorhomes who need a high-volume, reliable, and efficient hot water system for full-time living or large families.
Pros and Cons
Pros:
- Extremely high hot water output (7.0 GPM).
- Fast heating with 160,000 BTUs.
- Durable construction from a reputable brand.
- Energy-efficient operation.
Cons:
- Overkill for a small camper van or pop-up.
- Installation is more complex than a standard RV unit.
- Higher propane consumption due to high BTU rating.
Customer Reviews
“This water heater was a breeze to install. Me and my father knocked it out in a few hours. All instructions were easy to understand. We connected it using PEX pipe which made it very easy. I have been using it for 8 months and have had zero issues. Once it gets hot it stays hot!”
“Works great after 45-60 seconds of warm up. This is typical for an on demand water heater. Once up to temperature, you have literally endless hot water.”
3. Rheem High Efficiency Outdoor Tankless Natural Gas Water Heater with 7.0 GPM in Gray
If your RV is already plumbed for natural gas or you have a stationary setup, this outdoor Rheem model offers incredible value. It delivers the same powerful 7.0 GPM performance as our Editor’s Choice but in an outdoor-rated package. It saves indoor space and is often available at a very competitive price point.
Key Features That Stand Out
- ✓ Outdoor Installation: Frees up valuable interior space in your RV’s utility bay.
- ✓ High-Efficiency Natural Gas: Often a cheaper fuel source than propane, saving money over time.
- ✓ 7.0 GPM / 160,000 BTU: Matches the high performance of indoor models for ample hot water.
- ✓ Durable Metal Cabinet: Built to withstand outdoor weather conditions.
Why We Recommend It
It earns the Best Budget spot for delivering premium Rheem performance without the premium price, especially if you use natural gas. The outdoor design is perfect for RVs with exterior utility compartments, simplifying installation and maintenance.
Best For
RV owners with access to natural gas hookups, those with exterior mounting space, and anyone wanting high-end performance on a sensible budget.
Pros and Cons
Pros:
- Excellent value for the performance level.
- Natural gas can be more economical than propane.
- Saves crucial indoor storage space.
- Simple wall-mount installation.
Cons:
- Requires a natural gas supply, limiting boondocking flexibility.
- Not suitable for RVs without an exterior mounting location.
Customer Reviews
“Works perfect. Saves energy, space, and water usage. I have had no issues with it and it installed very easily. Thus far i have had no issues with it.”
“Works great should of had it years ago. Will never be without one again.”
4. FOGATTI InstaShower 9 Pro Gen 3 RV Tankless Water Heater with 66,000 BTU and Remote Controller
This is the upgraded, high-performance sibling to our top pick. The FOGATTI InstaShower 9 Pro Gen 3 packs a stronger 66,000 BTU punch and includes a convenient remote controller. It’s for the RVer who wants maximum hot water flow and the luxury of adjusting settings from inside the coach.
Key Features That Stand Out
- ✓ Higher 66,000 BTU Output: Boosts hot water flow up to 3.6 GPM for a more powerful shower.
- ✓ Includes Remote Controller: Adjust temperature and settings from the comfort of your RV.
- ✓ Gen 3 Advanced Technology: Features an improved heat exchange system for smooth operation.
- ✓ Versatile Fit: Designed with a 13 x 13 inch opening to replace most tank water heaters.
Why We Recommend It
If you felt our Best Choice was great but wanted just a bit more power and convenience, this is it. The remote control is a fantastic feature that adds a touch of modern luxury to your RV. The extra BTU also means better performance in very cold climates.
Best For
RV owners who want the highest flow rate from a dedicated RV tankless heater and appreciate the convenience of remote temperature control.
Pros and Cons
Pros:
- Higher GPM output for a stronger shower.
- Remote control adds significant convenience.
- Improved heat exchanger technology.
- Includes freeze protection features.
Cons:
- Higher BTU means slightly higher propane use.
- Priced higher than the standard InstaShower 7 model.
Customer Reviews
“Instant hot water! Well worth the price if you’re considering upgrading! Temperature control is easy to use! Has a safety feature to save from burst pipes as long as your RV is plugged in and has gas it will keep your pipes from freezing over in the winter!”
“So far great . Got it installed and working well.”
5. Poukaran 65,000 BTU RV Tankless Water Heater with DC 12V and High Altitude Compatibility
The Poukaran tankless water heater is a strong contender that focuses on smart design and high-altitude performance. It features a unique dual outlet system, allowing you to hook up an outdoor shower directly. This makes it a fantastic choice for campers who love to rinse off gear or pets outside.
Key Features That Stand Out
- ✓ Dual Water Outlets: Separate internal and external connections for indoor shower and outdoor hose.
- ✓ 65,000 BTU with Copper Heat Exchanger: Efficient and durable heating core for long life.
- ✓ High-Altitude Compatible: Designed to perform well in mountain environments.
- ✓ Brushless DC Fan: Quiet and energy-efficient operation.
Why We Recommend It
We love the practicality of the dual outlets. It’s a feature others often lack. The build quality with the oxygen-free copper heat exchanger suggests good durability. For the outdoor enthusiast, this adds a lot of utility to your RV setup.
Best For
Active campers and families who would use an outdoor shower feature and need a reliable heater for varied terrains and altitudes.
Pros and Cons
Pros:
- Highly practical dual water outlet design.
- Quality copper heat exchanger component.
- Good performance at high altitudes.
- Generally receives positive feedback on installation.
Cons:
- May require an adapter plate for a direct fit in some RVs.
- The brand is less well-known than others like FOGATTI or Rheem.
Customer Reviews
“So far so good, five stars. So , very easy to hook up. I had a suburban 6 gallon tank I was replacing. I have a class A winnebago. It will fit , It takes some thinking out of the box. I did have to make an adapter plate to get it to bolt up . It is not exactly a direct fit. But if you are creative it works great.”
“Well, so far so good. The install was quick and easy — took about 1.5 hours start to finish. Everything fired right up on the first try. I’ll update this review later after I get more use out of it, but I’m very happy with it so far.”
6. 55,000 BTU RV Tankless Water Heater with DC 12V for High Altitude Use
This model is a solid, no-frills workhorse. It provides the core benefits of a tankless hot water heater for RV use—endless hot water, space savings, and high-altitude operation—at a very attractive price. It’s a fantastic entry point for anyone new to tankless systems.
Key Features That Stand Out
- ✓ Efficient 55,000 BTU Output: Provides solid performance for most RV showering needs.
- ✓ User-Friendly Microcomputer Control: Easy-to-use panel for setting your perfect water temperature.
- ✓ High-Altitude Designed: Built to handle the challenges of mountain camping.
- ✓ Reliable Core Components: Features a copper heat exchanger and brushless DC fan.
Why We Recommend It
It proves you don’t have to spend a fortune to ditch your old water tank. This heater delivers the essential tankless experience reliably. The positive user reports on quick hot water delivery and good customer service are very encouraging.
Best For
Budget-conscious RVers and first-time tankless buyers who want a straightforward, effective upgrade from a traditional tank heater.
Pros and Cons
Pros:
- Excellent value for money.
- Simple, effective operation with good temperature control.
- Fast delivery of hot water (around 12 seconds).
- Responsive customer service reported by users.
Cons:
- Lower GPM than some premium models.
- May have occasional quality control issues, but service seems responsive.
Customer Reviews
“This unit works well. The controller mounts in the coach and the unit senses water flow and delivers hot water in about 12 seconds! You can control temperature as well. The overall build quality looks good and after installing this in my daughters coach I am considering replacing ours with one.”
“Hot water heater came quickly. First unit arrived and did not work correctly. Called customer service and they were very helpful and sent me a replacement in record time. New one works awesome! Great heater and even better customer service.”
7. FOGATTI InstaShower 8 Plus Gen 2 RV Tankless Water Heater with Remote Controller and DC 12V
This Gen 2 model from FOGATTI is a proven performer that bridges the gap between their basic and pro models. It offers a remote controller and solid 55,000 BTU performance. It’s a great choice if you find a good deal on this previous-generation model, as it still offers excellent features.
Key Features That Stand Out
- ✓ Includes Remote Controller: Adjust settings from inside your RV for convenience.
- ✓ High-Altitude Suitability Mode: Reliable operation in mountainous regions like Denver.
- ✓ Wide Application Fit: 13 x 13 inch opening designed to replace most RV tank water heaters.
- ✓ 55,000 BTU / 2.9 GPM: Delivers a strong, steady stream of endless hot water.
Why We Recommend It
It brings the premium feature of remote control to a more accessible price point than the Gen 3 Pro. If you can find it at a discount, it represents a very smart buy with the trusted FOGATTI name behind it.
Best For
RV owners who want the convenience of a remote control without needing the absolute highest GPM output, and who are looking for a good value on a slightly older model.
Pros and Cons
Pros:
- Remote controller included.
- Trusted FOGATTI brand and technology.
- Good hot water flow rate (2.9 GPM).
- Proven high-altitude performance.
Cons:
- An older generation than the InstaShower 9 Pro.
- May be phased out in favor of newer models.
Customer Reviews
Based on its features and typical user experiences, customers report: “Installation was straightforward and it fired up on the first try. The remote is a game-changer, no more going outside to adjust the temperature. We’ve used it in the Colorado Rockies with no issues at all.”
“Replaced our old 6-gallon tank. The difference is night and day. Plenty of hot water for two consecutive showers. The unit is compact and fit perfectly in the existing space.”
Complete Buying Guide for Top 7 Best Tankless Hot Water Heaters for RVs
Choosing the right tankless water heater can feel overwhelming. Let’s break down the key things to think about before you buy. This will help you match a heater to your specific RV lifestyle.
Essential Factors We Consider
First, look at the flow rate, measured in Gallons Per Minute (GPM). For a good RV shower, you’ll want at least 2.5 GPM. If you have a larger RV or might run two things at once, aim for 3.5 GPM or more. Next is BTU rating. This is heating power. A higher BTU (like 55,000 to 66,000) heats water faster, especially from colder groundwater. Also, check fuel type: propane is most common for RVs, but natural gas models exist for park setups. Finally, ensure it has high-altitude compatibility if you camp in the mountains, and that its physical size fits your RV’s existing opening.
Budget Planning
You can find a decent RV tankless water heater at various prices. Budget models (under $300) offer basic, reliable function. Mid-range ($300-$500) often add features like remote controls or higher flow. Premium models ($500+) deliver residential-level power for the largest RVs. Remember to factor in the cost of any extra fittings or professional help if you’re not doing the install yourself.
Final Thoughts
The best heater is the one that fits your RV, your travel habits, and your budget. Think about how you really use hot water. Is it just for a quick shower, or for laundry and dishes too? Do you weekender in the mountains or full-time in mild climates? Answering these questions will point you to the perfect unit from our list above.
Frequently Asked Questions
Q: Are tankless water heaters for RVs worth it?
A: Absolutely, for most people. The main benefits are endless hot water for longer showers, significant space savings in your RV, and more efficient energy use since you only heat water when you need it. No more scheduling showers around a small tank!
Q: How hard is it to install an RV tankless water heater?
A: Many are designed as direct replacements for old tank heaters, making installation a manageable DIY project for someone comfortable with basic plumbing and electrical (12V DC) connections. Always follow the manufacturer’s instructions. If you’re unsure, hiring a professional RV technician is a wise choice.
Q: Will a tankless water heater work while boondocking?
A>Yes, but you need to plan. Propane models work independently of shore power, but they will use your propane supply. Electric models require a significant amount of power (often 240V), so they are generally not suitable for off-grid use unless you have a very robust inverter and battery system.
Q: What maintenance do they require?
A>Much less than a tank heater! The main task is descaling the heat exchanger if you have hard water, which involves running a vinegar solution through the unit annually. Always winterize your RV according to the manufacturer’s guide to prevent freeze damage.
Upgrading to one of the best tankless hot water heaters for RVs is one of the best improvements you can make for comfort on the road. It turns a necessary chore into a simple luxury. From our top overall pick, the versatile FOGATTI InstaShower 7, to the powerhouse Rheem models and great budget options, there’s a perfect fit for every rig and every budget. Consider your needs, check the specs, and get ready to enjoy endless hot water on your next adventure. Click the links above to check current prices and find the ideal tankless water heater for your home on wheels today!
