10 Best Tankless Rv Water Heaters 2025 in the United States

The Fogatti RV Tankless Water Heater is designed specifically for RV users looking for reliable and efficient hot water on the go. It offers a strong flow rate of up to 3.6 gallons per minute, which is enough to comfortably supply hot water to both bathroom and kitchen at the same time without long waiting times. Its 66,000 BTU output ensures quick heating even in colder conditions or higher altitudes, supported by its advanced heat exchange system and weather-resistant build. The unit uses propane fuel, which is common for RV appliances and allows for energy-efficient operation, especially thanks to its ultra-low 0.5 GPM flow startup that saves fuel during low-demand use.

Temperature control is a standout feature here, maintaining water temperature within a tight ±1°F range and adapting flame intensity by season to avoid overheating or under-heating. The built-in mixing tank further smooths out sudden temperature changes, increasing comfort during showers. At 15 by 15 inches and weighing about 34 pounds, it strikes a good balance between compact size and power, making it practical for RV installation. It includes thoughtful extras like a pressure relief valve and remote control for convenience and safety, plus protective features against freezing, flame failure, and oxygen depletion.

Some users might find installation requires professional help if they aren’t comfortable with propane connections and venting. Also, while efficient, the 3.6 GPM flow might be limiting if multiple high-demand appliances run simultaneously. This water heater is well suited for RVers wanting consistent, energy-efficient hot water with good temperature stability and durability for everyday use and varying weather conditions.

The GIRARD Tankless RV Water Heater stands out with its powerful performance, delivering 42,000 BTUs, which means you can always expect a steady supply of hot water in your RV. The 12V power operation and quiet, brushless motor ensure that it runs smoothly and quietly, which is great for a comfortable RV experience. Additionally, it is lightweight at 22 pounds and has compact dimensions (12.5"W x 12.5"H), making it a practical choice for the confined spaces of an RV.

The onboard microprocessor is a smart feature that helps regulate water temperature and flow, preventing fluctuations and ensuring safety from cold spots or scalding water. This product also boasts high energy efficiency, using only half the LP gas compared to traditional six-gallon tank water heaters, which can lead to significant savings over time. The digital user control panel adds convenience, allowing you to easily adjust temperature settings, switch between Fahrenheit and Celsius, and troubleshoot with error codes.

While the installation is designed to be straightforward, professional installation is strongly recommended, which might add to initial costs. Nonetheless, its freeze protection feature is a notable advantage for varying weather conditions. On the downside, it might be a bit more expensive upfront compared to traditional water heaters, and the requirement for professional installation could be a drawback for DIY enthusiasts. This tankless water heater is best suited for RV owners looking for a reliable, efficient, and high-performing solution for their hot water needs.

The Furrion RV Tankless Gas Water Heater offers a strong 60,000 BTU heating power with a flow rate of 2.4 gallons per minute, which is quite capable for typical RV use, providing hot water steadily even in colder temperatures as low as 32°F. It runs on propane gas with electric ignition, making it a good fit for those who want an efficient and reliable fuel source while on the road. Its Vortex technology helps keep water temperature steady, which means fewer sudden temperature changes during use, and the dual-sensor safety shutdown adds peace of mind by preventing overheating.

This model is designed for easy replacement of older Suburban and Atwood models, thanks to its door mount style and matching dimensions (18.11" x 18.11"), which simplifies installation for many RV owners. It's built to handle rough travel conditions, incorporating vibration-resistant components to endure bumpy rides without damage.

With a weight of about 45.5 pounds and compact size, it balances portability with performance, though it might be a bit heavier compared to some smaller electric models. The heating efficiency is rated as efficient, helping to save propane fuel, but as a gas unit, it requires proper ventilation and maintenance to keep it working well over time. Maintenance is straightforward thanks to its design, but being a gas appliance, users should be comfortable with periodic checks or seek professional help when needed. This water heater is suitable for RV owners looking for a powerful, reliable propane-fueled unit that can replace older models easily and handle varying temperature needs, especially in colder climates. It may not be ideal for those who prefer electric-powered heaters or require extremely lightweight solutions.