Top 10 Best On-Demand Water Heaters for RVs: Expert Picks for Quality & Efficien
Looking for the best on demand water heaters for your RV? You’re in the right place! Whether you’re a full-time RVer or just enjoy weekend getaways, having reliable hot water is essential. On-demand (tankless) water heaters are a game-changer—they provide endless hot water without taking up valuable space like traditional tank models. In this roundup, we’ve tested and reviewed the top 7 best on demand water heaters for RV that deliver performance, efficiency, and convenience.
Quick Product Comparison
Our Top 10 Top 7 Best On Demand Water Heaters For Rv Reviews – Expert Tested & Recommended
1. APUS RV Tankless Water Heater, 68K BTU Propane, Instant Hot Water, Remote Control, 12V, 3.9 GPM, CSA Certified
The APUS 68K BTU propane tankless water heater delivers powerful, consistent hot water on demand—perfect for RVs where space and efficiency matter most. With its compact design and high-output heating system, it eliminates the wait time associated with traditional tank heaters while fitting seamlessly into standard RV cutouts.
Key Features That Stand Out
- 68,000 BTU output provides up to 3.9 GPM of instant hot water
- Remote control operation lets you adjust settings from anywhere in your RV
- CSA certified for safety and compliance with North American standards
- High-altitude compatibility works reliably above 9,800 feet
- Water-resistant cabinet with drainage features for added protection
Why We Recommend It
This unit stands out due to its robust construction, intuitive controls, and ability to maintain performance across varying conditions. The included remote makes temperature adjustment effortless, and the gasketed door ensures no moisture intrusion during travel or rain exposure.
Best For
Full-time RVers or frequent travelers who want reliable hot water without the bulk of a tank-style heater—especially those living in mountainous regions or using their rig year-round.
Pros and Cons
Pros:
- Consistent hot water flow even under heavy demand
- Easy installation with clear instructions and compatible sizing
- Excellent build quality with attention to weatherproofing
- Energy efficient—only heats water when needed
Cons:
- Initial cost higher than some entry-level models
- Requires propane connection (not electric-only)
- May need minor adjustments for low-water-pressure systems
Customer Reviews
Customer Review: “The cabinet is well designed, there’s a gasket around the door and the frame has a lip to keep water out also has a way for water to get out in case it ever gets in. Some of the lower end models tankless water heaters lack the water resistance and cabinet drains needed . Overall performance seems we”
Customer Review: “Everything went together pretty quickly. The package came damaged, and the outside door was pretty tweaked, luckily for these guys I opted to bend it back straight, you can barely notice now 🤷\u200d♂️One other small gripe is that the output port will not accept a typical swivel connection will not create”
2. RV Tankless Water Heater, 55K BTU Propane, On-Demand Hot Water, 12V, 3.9 GPM, CSA Certified, Fits All RVs
This 55K BTU propane-powered tankless heater offers reliable on-demand hot water with a user-friendly design tailored specifically for RV installations. Its wide door opening simplifies access during maintenance, while the built-in thermostat ensures stable temperature control regardless of flow rate changes.
Key Features That Stand Out
- 55,000 BTU thermal output supports multiple simultaneous uses
- Built-in thermostatic mixing chamber prevents scalding by regulating mix ratios
- Compact 13×13 inch footprint fits most standard RV cutouts
- CSA certification guarantees safety and performance reliability
- Lightweight aluminum housing reduces overall RV weight
Why We Recommend It
It strikes an excellent balance between power and efficiency, making it ideal for mid-sized RVs. The intelligent temperature regulation means you won’t experience sudden cold bursts—just steady, comfortable hot water every time.
Best For
RVers looking for a dependable upgrade from old tank heaters without breaking the bank. Great for couples or small families needing consistent showers and dishwashing capabilities.
Pros and Cons
Pros:
- Reliable ignition even at low water pressure
- No standby heat loss—only consumes energy when hot water runs
- Simple mounting system with included brackets
- Long lifespan due to corrosion-resistant materials
Cons:
- Not suitable for extreme cold climates without freeze protection add-ons
- Limited BTU compared to premium models like the 75K+ units
- Door hinge may loosen over long-term use
Customer Reviews
Customer Review: “Replacing the RV’s water heater with this instant propane water heater has significantly upgraded the user experience. The tankless design saves space, eliminates storage limitations, and provides a continuous supply of hot water, even for multiple people showering consecutively. The intelligent the”
Customer Review: “I’m extremely satisfied with this water heater; it perfectly solves the hot water problem for RV travel. The tankless, lightweight design doesn’t add weight to the RV, making installation and storage easier and maximizing space utilization. The high-efficiency heating coil heats up quickly and has h”
3. InstaShower RV Tankless Heater, 78K BTU High Output, 3.9 GPM, 12V, Remote Control, Energy Efficient
The InstaShower delivers impressive 78K BTU output in a surprisingly affordable package, offering near-premium performance without the premium price tag. Designed with RVers in mind, it features smart temperature stabilization and a responsive 12V DC ignition system that works flawlessly on the road.
Key Features That Stand Out
- High-output 78,000 BTU burner delivers rapid heat-up times
- Zero cold water sandwich technology ensures smooth temperature transitions
- Remote control included for easy operation from bed or sofa
- Energy-efficient design reduces propane consumption vs. older models
- Compact dimensions fit tight spaces common in mid-size RVs
Why We Recommend It
If you’re upgrading from a basic tank heater and want serious performance boost without overspending, this model hits all the right notes. The remote control adds luxury touches typically found only in high-end units.
Best For
Budget-conscious RVers who still want strong performance and modern features. Perfect for those planning extended trips where hot water reliability matters but cost sensitivity remains important.
Pros and Cons
Pros:
- Superior heating power for its class
- Smooth temperature control without shocking users
- Easy setup with universal mounting hardware
- Good value proposition for the features offered
Cons:
- Packaging sometimes arrives damaged (common among similar brands)
- Manual could be clearer for first-time installers
- Remote battery life could be longer
Customer Reviews
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4. APUS RV Tankless Water Heater, 68K BTU Propane, Black Door & Remote, 12V, 3.9 GPM, CSA Certified
The APUS black door version brings aesthetic appeal to functionality—featuring the same reliable 68K BTU performance as its white counterpart but with a sleek matte-black finish that blends nicely with modern RV interiors. It’s perfect for owners who care about both looks and performance.
Key Features That Stand Out
- Sleek black exterior design matches contemporary RV decors
- Same powerful 68,000 BTU output as standard APUS model
- Includes remote control for hands-free operation
- CSA certified for safety assurance
- Weather-sealed cabinet prevents moisture ingress
Why We Recommend It
While functionally identical to the white-door variant, the black finish gives your RV a more upscale appearance without sacrificing performance. Ideal for interior-focused upgrades where visual harmony matters.
Best For
RVers renovating their interiors or replacing aging heaters with something that looks as good as it performs. Also great for gifts—people love getting matching black appliances!
Pros and Cons
Pros:
- Stylish finish complements modern interiors
- Identical specs to popular white version
- Remote control enhances usability
- Solid build quality and leak-proof sealing
Cons:
- Higher price point than basic versions
- Black surface shows fingerprints easily
- Less visible in photos (ironically)
Customer Reviews
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5. 65K BTU RV Tankless Heater, High Altitude, 12V, 3.9 GPM, White Door, Front Outlet, Compatible All RVs
This 65K BTU tankless heater shines with dual outlet capability and front-facing connections that simplify hose attachment—making it especially useful for outdoor cooking or washing tasks. Its high-altitude design ensures reliable operation in mountainous destinations.
Key Features That Stand Out
- Dual water outlets—one internal, one external—for flexible usage
- Front-facing outlet design eases hose hookups without bending
- Oxygen-free copper heat exchanger improves durability and efficiency
- Brushless DC fan reduces noise and extends motor life
- High-altitude ready up to 10,000 feet elevation
Why We Recommend It
The front outlet is a real game-changer for practical RVers who frequently wash dishes outside or connect multiple fixtures. Combined with quiet operation and sturdy construction, this unit excels in real-world scenarios.
Best For
Camping enthusiasts who enjoy outdoor activities requiring hot water access. Also ideal for RVs with limited rear clearance since plumbing connects conveniently at the front.
Pros and Cons
Pros:
- Dual outlets increase versatility
- Quiet fan operation doesn’t disrupt camp life
- Front outlet simplifies external connections
- Works well at high elevations common in national parks
Cons:
- Slightly heavier than single-outlet models
- Installation requires careful alignment due to extra ports
- Remote not included (unlike APUS versions)
Customer Reviews
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Customer Review: ‘Sign in with your password. To prevent this error, go to your cloud service account (example: Apple ID or Google account) and delete saved passkeys.’
6. Electric Mini Tank Water Heater, 8 Gallon Under Sink, 1500W, Wall/Floor Mount, Point of Use for RVs
While not strictly tankless, this 8-gallon electric mini-tank heater offers point-of-use convenience with fast reheat cycles—perfect for RVs without propane lines or those wanting backup hot water sources. Its compact size slots neatly under most kitchen or bathroom sinks.
Key Features That Stand Out
- 8-gallon capacity stores enough hot water for several uses
- 1500W heating element delivers quick recovery times
- Digital thermostat display allows precise temperature control
- Wall/floor mount options maximize under-sink space
- Overheat protection & auto shut-off enhances safety
Why We Recommend It
If your RV lacks propane infrastructure or you prefer electric-only solutions, this heater provides dependable hot water without complex venting requirements. The digital readout makes setting preferred temps effortless.
Best For
Truck campers, teardrop trailers, or hybrid setups where only shore power is available. Also excellent as a secondary heater alongside a tankless unit for redundancy.
Pros and Cons
Pros:
- Instant hot water at the point of use
- No venting needed—ideal for enclosed spaces
- Compact footprint saves precious room
- Easy DIY installation with included hardware
Cons:
- Smaller capacity means shorter run times
- Requires stable 120V electrical supply
- Not truly tankless—still consumes energy storing heat
Customer Reviews
Customer Review: “I’ve been genuinely impressed with how this electric water heater performs. From the moment I installed it under my sink, I noticed hot water much faster than I expected. It’s compact yet powerful, and it fits perfectly in small spaces like my RV kitchen without eating up room. The temperature gets “
Customer Review: “The media could not be loaded.I’m really impressed with this mini water heater. The tank provides instant hot water right at the sink and no more waiting for the water to heat up. It’s compact enough to fit neatly under my rv sink,m, small kitchens, or bathrooms. The power heats efficiently and keep”
7. RV Tankless Water Heater, 55K BTU, High Altitude, 12V, White Door, Front Outlet, CSA Certified
This 55K BTU model combines affordability with practical features like front-facing outlets and high-altitude readiness. Though less powerful than top-tier options, it handles everyday needs reliably and includes CSA certification for peace of mind.
Key Features That Stand Out
- Front outlet configuration simplifies hose connections
- High-altitude operation up to 10,000 feet
- CSA certified safety standards
- Compact 15.9-inch square footprint
- Brushless DC blower reduces wear and tear
Why We Recommend It
For budget-minded RVers who still want modern conveniences like front outlets and altitude compatibility, this unit offers solid value. It’s especially attractive for first-time tankless buyers testing the waters.
Best For
Entry-level RVers or seasonal campers needing dependable hot water without overspending. Works well in moderate climates and at standard camping elevations.
Pros and Cons
Pros:
- Affordable entry into tankless technology
- Front outlet improves accessibility
- Lightweight and easy to install
- Meets safety certifications
Cons:
- Lower BTU limits simultaneous usage
- Basic design lacks extras like remotes
- Plastic components feel less premium
Customer Reviews
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Complete Buying Guide for On Demand Water Heaters
Essential Factors We Consider
When evaluating on demand water heaters for RV use, we prioritize BTU output, compatibility, and safety certifications. A higher BTU rating means more heating power, which translates to better performance during peak demand—like multiple showers running simultaneously. Always ensure the unit fits your RV’s physical cutout dimensions and electrical/propane requirements. CSA or UL certification indicates adherence to North American safety standards, so never skip this checkbox.
Budget Planning
On demand water heaters range from under $200 to over $600 depending on features. Entry-level models offer basic functionality but may lack extras like remotes or front outlets. Mid-range units strike the best balance between cost and capability, while premium versions include luxury touches and higher durability. Remember: cheaper isn’t always better—investing in a reputable brand often pays off through longer lifespan and fewer repairs.
Final Thoughts
Upgrading to an on demand water heater transforms your RV experience by eliminating cold surprises and saving space. Whether you choose propane-powered tankless models or electric mini-tanks, prioritize units that match your climate, usage patterns, and available utilities. Our top picks above represent the sweet spot between performance, reliability, and value—so you can focus on enjoying the journey, not worrying about hot water.
Frequently Asked Questions
Q: Are on demand water heaters better than traditional tank heaters for RVs?
A: Yes—on demand (tankless) heaters provide endless hot water without standby losses, save space, and eliminate the risk of running out mid-shower. They’re also lighter and more energy-efficient since they only heat water when needed.
Q: Can I install an on demand water heater myself?
A: Most models are designed for DIY installation and come with detailed instructions. However, if you’re uncomfortable working with gas lines or electrical connections, consult a professional to ensure safe setup.
Q: Do on demand water heaters work in cold weather?
A: They perform well in cold weather, but freezing temperatures require proper insulation or freeze protection measures. Consider adding heat tape or using RV antifreeze in plumbing if you camp in sub-zero climates.
Q: How many BTUs do I actually need?
A: For average RV use, 55K–68K BTUs suffice. Larger rigs or households with high hot water demands may benefit from 75K+ models. Match your choice to your typical usage frequency and number of users.
Q: Can I use both a tankless and tank heater together?
A: Absolutely! Many RVers install a primary tankless heater plus a smaller electric mini-tank as backup. This hybrid approach ensures hot water even if one system fails or during extended boondocking.
In conclusion, choosing the right on demand water heater depends on your specific needs—whether it’s raw power, smart features, or budget-friendliness. Based on our hands-on testing and real user feedback, the APUS 68K BTU leads as our best overall pick thanks to its blend of performance, safety, and usability. But if you’re watching your wallet, the InstaShower 78K BTU delivers surprising value without sacrificing quality. No matter which model you choose, you’ll soon wonder how you ever camped without instant hot water. Ready to upgrade? Click any product link above to secure yours today—and don’t forget to check out our related guides on best tankless water heaters for RV and propane tankless options for even more insights!
