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 Fogatti RV Tankless Water Heater is a solid choice for RV owners who want instant hot water without waiting. It offers a strong flow rate of up to 3.6 gallons per minute, enough to run the bathroom and kitchen simultaneously. Running on 66,000 BTU gas power, it heats water quickly and efficiently while using less energy than traditional tank heaters. The unit is fairly compact (15x15 inches) and weighs about 31 pounds, making it manageable for wall mounting and suitable for replacing common RV water heaters.

Temperature control is precise within about 1 degree Fahrenheit, and it smartly adjusts flame intensity based on the season to avoid overheating or underheating. A built-in mixing tank helps keep water temperature stable, so you won’t get sudden hot or cold bursts. Installation is user-friendly since it fits standard openings, and it includes safety features like automatic gas shutoff, anti-freeze protection, and a pressure relief valve, which saves extra purchases. The remote controller adds convenience for adjusting settings from a distance.

While it performs well at higher altitudes and windy conditions, it relies on a 12V DC power source requiring your RV’s electrical system to be compatible. Also, its maximum temperature tops out at 123°F, which is sufficient for most uses but might feel less hot to some. This heater blends reliable performance, safety, and ease of use, making it a practical upgrade for everyday RV water heating 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.