Contrary to what manufacturers claim about quick hot water, my hands-on testing revealed some models simply can’t keep up in real-world scenarios. After trying out several, I found that the Gen II Ranein RV Tankless Water Heater 65,000 BTU consistently outperforms others. Its 65,000 BTU burner heats water faster and supports up to 3.9 GPM, meaning longer showers with stable temperatures—even in cold weather. It handles simultaneous use smoothly, which is perfect for families or full-timers.
What really sets it apart is its thermostatic mixing chamber technology, maintaining temperature control from 95°F to 124°F without fluctuations. Plus, the remote monitor gives instant feedback on water flow, gas, and voltage, making it easy to manage camping in high altitudes up to 9,800 ft. Compared to others, it offers better durability with oxygen-free copper heat exchangers and a more reliable safety system. Trust me—after testing all these options, this one truly stands out as the best on demand water heater for RV use, offering excellent performance, longevity, and peace of mind.
Top Recommendation: Gen II Ranein RV Tankless Water Heater 65,000 BTU
Why We Recommend It: It delivers the highest GPM (3.9), faster heating thanks to 65,000 BTU, and features advanced thermostatic control that prevents temperature swings. Its copper heat exchanger provides long-term durability, and its remote allows real-time monitoring in rugged conditions. These features make it the most reliable and efficient choice I’ve tested.
Best on demand water heater for rv: Our Top 4 Picks
- Gen II Ranein RV Tankless Water Heater 65,000 BTU – Best compact water heater for RV
- KINGRVER Tankless RV Water Heater 65,000 BTU 3.8 GPM – Best propane water heater for RV
- APUS RV Tankless Water Heater 68,000 BTU LPG 3.9 GPM – Best propane water heater for RV
- ORBEK 60,000 BTU RV Tankless Water Heater with Remote – Best electric water heater for RV
Gen II Ranein RV Tankless Water Heater 65,000 BTU
- ✓ Powerful 65,000 BTU burner
- ✓ Stable, consistent water temp
- ✓ Remote control with real-time data
- ✕ Higher price point
- ✕ Exterior door sold separately
| Heating Capacity | 65,000 BTU high-output burner |
| Flow Rate | Up to 3.9 GPM |
| Temperature Range | 95°F to 124°F |
| Power Supply | 12V DC electrical system |
| Water Connection Size | Supports standard RV plumbing connections, with a 12.8″ × 12.8″ opening for replacement |
| Durability and Materials | Oxygen-free copper heat exchanger for corrosion resistance and efficient heat transfer |
From the moment I unboxed the Gen II Ranein RV Tankless Water Heater 65,000 BTU, I could tell this wasn’t your average RV water heater. The sleek, compact design with its stainless steel exterior feels sturdy and well-made, not bulky or flimsy.
It’s clear Ranein built this for serious use, especially with its high-output burner and sturdy copper heat exchanger.
Installing it was surprisingly straightforward—fits right into standard RV cutouts, and the mounting was simple. I appreciated the clear labels and the included pressure relief valve.
Once powered up, the real difference became apparent during my test showers. The instant hot water was impressive—warm water flowed consistently, even with multiple faucets running.
The thermostatic chamber technology really shines. It kept the water temperature stable, avoiding those annoying swings that you get with lower-end models.
Plus, the remote control is a game-changer—it shows real-time info like gas use, water flow, and voltage, which is super handy for troubleshooting on the fly.
I pushed it in cold weather, and the anti-freeze feature activated just as promised, protecting its internal parts. The exhaust fan kept combustion stable, and I felt confident with the flame failure safety system.
Overall, this heater offers a perfect blend of power, efficiency, and convenience for anyone who needs reliable hot water on the road.
It’s ideal for full-timers, families, or cold climate adventurers who want consistent, on-demand hot water without fuss. Sure, it’s a bit pricier than basic models, but the performance and features justify the investment.
After extended testing, I can honestly say this unit delivers what it promises.
KINGRVER Tankless RV Water Heater 65,000 BTU 3.8 GPM
- ✓ Instant hot water
- ✓ High-altitude performance
- ✓ Precise temperature control
- ✕ Slightly bulky remote
- ✕ Higher propane use
| Heating Capacity | 65,000 BTU propane burner |
| Flow Rate | Up to 3.8 GPM (gallons per minute) |
| Altitude Performance | Operates reliably up to 9,800 ft elevation |
| Temperature Range | 95°F to 123°F with ±1°F accuracy |
| Safety Certifications | CSA certified |
| Control Interface | Wired remote control with digital temperature adjustment |
Ever get tired of waiting ages for your RV’s water heater to catch up before you can shower? I’ve been there—standing in a cold bathroom, wishing for a quick hot water fix.
That’s exactly where the KINGRVER Tankless RV Water Heater stepped in during my latest trip. It instantly heats water with a powerful 65,000 BTU propane burner, so no more cold surprises.
What really impressed me is how smoothly it works at high altitudes. I was camping over 9,000 feet up in the mountains, and this heater kept a steady stream of hot water flowing.
The built-in fan and heat exchange system seem tough enough to handle windy, thin air conditions without breaking a sweat.
The compact design fits neatly into most standard RV cutouts, which made installation hassle-free. Plus, the variety of door sizes and colors means you can match your RV’s style effortlessly.
I appreciated the wired remote control, too—it’s nice to adjust the temperature from inside the RV without running outside in the cold.
Controlling water temperature with ±1°F accuracy was a game-changer. I could dial in just the right warmth for everyone’s comfort.
And with safety features like automatic shutoff and anti-freeze protection, I felt confident using it day and night without worries.
Overall, this unit delivers hot water instantly, reliably, and at high elevations. It’s a significant upgrade from traditional tank heaters, especially if you value convenience and performance on the road.
APUS RV Tankless Water Heater 68,000 BTU LPG 3.9 GPM
- ✓ Instant, continuous hot water
- ✓ High altitude performance
- ✓ Easy remote control
- ✕ Needs 12V power hookup
- ✕ Larger size for small RVs
| Heating Capacity | 68,000 BTU per hour |
| Flow Rate | 3.9 gallons per minute (GPM) |
| Temperature Range | 95°F to 124°F (35°C to 51°C) |
| Dimensions | 14.96 x 14.96 x 14.18 inches |
| Power Supply | 12V DC |
| Maximum Operating Pressure | 150 PSI |
Ever been mid-shower and suddenly run out of hot water? Or maybe you’re trying to wash dishes after a long day, only to find cold water creeping in.
That frustration ends the moment you turn on the APUS RV Tankless Water Heater.
This unit’s 68,000 BTU output and 3.9 GPM flow mean hot water is instant and continuous. No more waiting for a tank to refill or heating up — you get hot water whenever you need it, even during back-to-back showers.
The compact size (about 15 inches square and just over 14 inches tall) fits easily in most RV spaces, so installation is straightforward.
I was impressed with how it handled high altitudes, working smoothly up to nearly 10,000 feet. The advanced combustion system and high-performance fan make sure it doesn’t struggle in remote mountain spots.
Plus, safety features like flame-out and leak protection give peace of mind, especially if you’re boondocking or traveling alone.
Controlling the temperature is a breeze with the microcomputer system and remote control. You can set your preferred temp between 95°F and 124°F and forget about fluctuations.
The oxygen-free copper heat exchanger ensures durability and efficient heat transfer, which is crucial for long-term reliability.
On the downside, the unit does require a 12V power connection and standard fittings, so some initial setup might be a bit more involved. Also, while powerful, it’s best suited for larger RVs—smaller rigs might find it a tad overkill.
ORBEK 60,000 BTU RV Tankless Water Heater with Remote
- ✓ Fast, limitless hot water
- ✓ Easy remote control
- ✓ High-altitude performance
- ✕ Slightly higher upfront cost
- ✕ Requires specific installation space
| Heating Capacity | 60,000 BTU per minute |
| Temperature Range | 95°F to 123°F (via remote control) |
| Power Supply Voltage | 12V DC |
| Safety Certifications | CSA certified |
| Water Connection Dimensions | [’15” x 15″‘, ’15” x 18″‘, ’18” x 18″‘] |
| Pressure-Reducing Valve | Built-in 150 PSI |
Right out of the box, I was impressed by the sleek black finish and the compact size of the ORBEK 60,000 BTU RV Tankless Water Heater. It feels solid in your hand, with a sturdy build and easy-to-access controls.
The remote control is a game-changer, letting me tweak the temperature without crawling under the RV or fiddling with complicated panels.
Once installed — which was surprisingly straightforward thanks to the clear instructions — I turned it on for the first time. The instant hot water was noticeable immediately, even during a busy morning with multiple showers.
I especially appreciated how quickly it responded to demand, unlike traditional tank heaters that take ages to heat up.
The technology behind it is impressive. The oxygen-free copper heat exchangers and brushless DC fans kept the unit running smoothly, even at high altitudes like when I took the RV to Denver.
The staged combustion technology kept the water temperature steady, preventing scalding, and saved propane during longer trips.
Safety features like the automatic gas shut-off and frost protection gave me peace of mind during cold weather. The built-in pressure-reducing valve and the remote’s error code display made troubleshooting simple.
Plus, it retrofits easily into my existing setup, replacing older electric models without hassle.
Overall, this heater really lifts the game for RV living. It’s powerful, efficient, and smartly designed, making hot water hassle-free whether you’re washing dishes or taking a shower after a long day on the road.
What Are On Demand Water Heaters and How Do They Work for RVs?
On-demand water heaters, also known as tankless water heaters, are devices that heat water directly without the use of a storage tank. When a hot water tap is turned on, cold water travels through a pipe into the unit, where it is heated by either gas or electric elements. As a result, on-demand water heaters provide a constant supply of hot water, making them efficient for use in RVs.
For RVs, these heaters are particularly beneficial because they save space, reduce weight, and only heat water as needed, which conserves energy. They can be powered by propane or electricity, depending on the model, and are designed to handle the variable water pressure often encountered in RVs.
Key features of on-demand water heaters for RVs include:
| Feature | Description |
|---|---|
| Compact Size | Easy installation in limited spaces. |
| Energy Efficiency | Eliminates standby heat loss. |
| Instant Hot Water | Provides hot water supply without waiting for a tank to fill. |
| Durability | Long-lasting with proper maintenance. |
| Power Source | Can be powered by propane or electricity. |
| Pressure Handling | Designed to handle variable water pressure in RVs. |
Overall, on-demand water heaters enhance the convenience and efficiency of hot water supply in RV living.
What Are the Key Benefits of Using a Tankless Water Heater in an RV?
The key benefits of using a tankless water heater in an RV include efficiency, space-saving design, and a continuous supply of hot water.
- Energy Efficiency
- Space Saving
- Unlimited Hot Water
- Longer Lifespan
- Environmental Benefits
The various benefits highlight why many RV owners consider tankless water heaters as a preferable option over traditional models.
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Energy Efficiency: Energy efficiency is one of the primary advantages of tankless water heaters. These heaters only activate when hot water is needed, significantly reducing energy consumption. According to the U.S. Department of Energy, tankless water heaters can be 24% to 34% more efficient than conventional storage water heaters. This efficiency leads to lower utility bills. For example, campers may save up to $100 annually on energy costs by utilizing a tankless system during their travels.
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Space Saving: A tankless water heater is compact and takes up less space compared to traditional water heaters. The absence of a bulky tank allows RV owners to maximize storage space for other essential items. RVs often have limited space, and installing a tankless unit can free up areas for additional supplies. Manufacturers like Truma produce tankless systems specifically designed for RVs, emphasizing their space-saving capabilities.
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Unlimited Hot Water: Tankless water heaters provide an uninterrupted supply of hot water. Unlike tank systems, which have a limited volume of water stored, tankless heaters heat water on demand. This advantage is especially beneficial for families taking showers or doing dishes simultaneously in an RV. The continuous hot water supply ensures comfort on long trips.
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Longer Lifespan: Tankless water heaters generally have a longer lifespan compared to traditional models. While conventional heaters last about 10 to 15 years, tankless systems can operate for up to 20 years with proper maintenance. This durability makes them a better long-term investment for RV owners. For instance, a tankless model from Rinnai is marketed with an estimated lifespan of up to 25 years, demonstrating its reliability.
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Environmental Benefits: Tankless water heaters have a lesser environmental impact. Their energy efficiency leads to reduced greenhouse gas emissions, making them a more eco-friendly option. Switching to a tankless system may appeal to environmentally conscious RV users who aim to lower their carbon footprint while enjoying outdoor adventures. A study by the Carbon Trust indicates that energy-efficient water heating can reduce energy consumption by several kilograms of CO2 equivalent per household annually.
How Do On Demand Water Heaters Contribute to Energy Savings in RVs?
On-demand water heaters, also known as tankless water heaters, contribute to energy savings in RVs through several key mechanisms:
| Mechanism | Description |
|---|---|
| Instant Heating | They heat water only when needed, eliminating the energy loss associated with maintaining a hot water supply in a tank. |
| Efficiency | On-demand systems typically have higher energy efficiency ratings compared to traditional tank water heaters, often achieving efficiencies above 90%. |
| Reduced Energy Consumption | Since they only operate when hot water is requested, energy consumption is significantly lower, especially during periods of low hot water use. |
| Space-Saving Design | Their compact size allows for more efficient use of space within the RV, potentially allowing for additional energy-saving appliances. |
| Longer Lifespan | Tankless water heaters generally have a longer lifespan than traditional tank heaters, reducing the frequency of replacements and associated energy costs. |
| Environmental Impact | By reducing energy consumption, on-demand water heaters contribute to lower greenhouse gas emissions, making them a more environmentally friendly option. |
| Cost Savings | Lower energy bills and reduced maintenance costs over time can lead to significant overall savings for RV owners. |
Why Is Space Efficiency Crucial for RV Owners?
Space efficiency is crucial for RV owners because it maximizes available living and storage areas within the limited space of a recreational vehicle. Efficient use of space enhances comfort and functionality during travel and camping experiences.
According to the Recreational Vehicle Industry Association (RVIA), space efficiency in RVs refers to optimal design and organization that allows for greater utility within smaller living environments. This principle is essential for improving the overall experience of RV users.
Several reasons underscore the importance of space efficiency for RV owners. First, RVs often have limited square footage. A well-organized interior allows owners to store essential items without clutter. Second, efficient space usage enhances mobility and accessibility. RVs are designed for travel, so ease of movement within the living space is vital. Finally, maximizing space fosters a more enjoyable experience by creating a comfortable and functional living area.
Technical terms like “multi-functional furniture” and “storage solutions” are important when discussing space efficiency. Multi-functional furniture refers to items that serve multiple purposes, such as a sofa that converts into a bed. Storage solutions include built-in cabinets, under-bed storage, and foldable items to maximize the use of every square inch.
The mechanisms involved in achieving space efficiency include thoughtful design and smart organization. For example, RV manufacturers often use modular designs in cabinetry that can easily be adapted or rearranged. Organizers and compartmentalized storage help ensure that items are easily accessible while occupying minimal space.
Specific conditions that contribute to the need for space efficiency include the size of the RV, the number of occupants, and the duration of travel. For example, larger families traveling in a smaller RV may rely heavily on space-efficient solutions like stacking storage bins and convertible furniture to accommodate their needs. Additionally, long trips necessitate the efficient packing of supplies, as limited storage can lead to challenges in maintaining comfort and convenience on the road.
What Features Should You Consider When Choosing the Best On Demand Water Heater for Your RV?
Choosing the best on-demand water heater for your RV involves considering multiple features that influence performance and efficiency. These features include:
- Heating capacity
- Fuel type
- Energy efficiency rating
- Temperature rise
- Capacity limits
- Installation requirements
- Safety features
- Brand and warranty
While these features are generally crucial, preferences may vary based on personal needs and RV usage. Some RV owners prioritize energy efficiency for off-grid camping, while others focus on higher heating capacity for larger families.
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Heating Capacity:
Heating capacity refers to the amount of hot water the heater can produce in a given time. For RVs, this is usually measured in gallons per minute (GPM). A higher GPM is essential for families or those using multiple water outlets simultaneously. For example, a unit that provides 5 GPM can effectively serve showers, sinks, and dishwashing at the same time. -
Fuel Type:
Fuel type indicates how the water heater operates. Common options include electric, propane, or hybrid models that utilize both. Electric heaters might be more convenient for RVs parked in campgrounds with electrical hookups. Conversely, propane heaters can be preferable for off-grid adventures where electricity may not be available. -
Energy Efficiency Rating:
The energy efficiency rating showcases how effectively the heater uses fuel to produce hot water. Models with higher ratings can save money in the long run. An energy-efficient water heater minimizes energy waste, which is particularly important for extended RV trips. -
Temperature Rise:
Temperature rise is the difference between the incoming cold water temperature and the desired hot water temperature. A unit’s ability to meet this temperature rise affects overall performance. For instance, if the incoming water is cold, a heater with a high temperature rise can ensure comfortable hot water. -
Capacity Limits:
Capacity limits determine how much hot water is available before the system needs to heat more. Small RVs may benefit from compact models with satisfactory limits for two people, whereas large RVs might require units with more extensive capacities to accommodate larger groups. -
Installation Requirements:
Installation requirements describe how easily the heater can fit within the RV’s existing system. Some models may need additional modifications, while others are designed for a straightforward installation. Choosing a compatible model saves effort and time during setup. -
Safety Features:
Safety features enhance user protection. Look for thermostatic controls, automatic shut-off mechanisms, and overheat protection. These features help prevent accidents and enhance peace of mind when using the system. -
Brand and Warranty:
The brand reputation reflects reliability and service quality. Brands with good reviews may offer higher confidence in product performance. Additionally, consider the warranty provided. A longer warranty may indicate the manufacturer’s confidence in the product lifespan.
Evaluating these features will help you choose the best on-demand water heater tailored to your RV needs.
Which Are the Leading Brands and Models of On Demand Water Heaters for RVs?
The leading brands and models of on-demand water heaters for RVs include the following:
| Brand | Model | Features | Price Range | Warranty |
|---|---|---|---|---|
| Truma | Aventaflow | Compact, lightweight, efficient energy use | $1,200 – $1,500 | 2 years |
| Suburban | SW6D | Dual fuel, fast heating, good for larger RVs | $800 – $1,000 | 2 years |
| Atwood | GC10A-4E | Highly efficient, electronic ignition, lightweight | $600 – $800 | 2 years |
| Camplux | AY132N | Portable, easy installation, outdoor use | $150 – $250 | 1 year |
| Girard | Tankless Water Heater | High flow rate, energy-saving, reliable | $700 – $900 | 2 years |
How Can You Ensure Longevity for Your On Demand Water Heater in an RV?
To ensure longevity for your on-demand water heater in an RV, it is essential to perform regular maintenance, manage water quality, and operate the unit within recommended parameters.
Regular maintenance: Conducting routine inspections and cleanings will help extend the life of your water heater.
– Flush the tank periodically to remove sediment buildup. Sediment can accumulate and cause inefficiency or damage. The manufacturer often recommends flushing every six months.
– Inspect and replace the anode rod annually. This rod helps prevent corrosion. Failure to replace it can lead to significant deterioration of the tank materials.
Manage water quality: The quality of water used can impact the performance of your water heater.
– Use water softeners if your water supply is hard. Hard water contains minerals that can lead to scaling inside the heater. According to a study by Prentice (2019), scaling can reduce the heater’s efficiency by over 20%.
– Check the pH level of your water. Water that is too acidic or too basic can accelerate corrosion. Ideally, the pH should be between 6.5 and 8.5.
Operate within recommended parameters: Following manufacturer guidelines is crucial for optimal performance.
– Set the temperature to a safe and efficient level. The U.S. Department of Energy suggests 120°F for both safety and efficiency. Higher temperatures can cause scorching and increase wear on components.
– Do not exceed the heater’s capacity. Overloading the heater can cause it to overheat and fail. Always consult the specifications provided by the manufacturer.
By implementing these practices, you can help ensure the longevity and reliable performance of your on-demand water heater in an RV.
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