10 Best Rv Tankless Water Heaters 2025 in the United States

The FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, is designed with RV enthusiasts in mind, particularly benefiting those who travel to high altitudes. One of its standout features is its capability to function effectively at elevations up to 9,800 feet, which is a significant plus for campers heading to mountainous regions. With a flow rate of up to 2.9 gallons per minute and a powerful heat output of 55,000 BTU, it ensures an uninterrupted supply of hot water, allowing multiple users to shower without running out of hot water quickly—a common issue with traditional tank heaters.

Installation is straightforward, as it can replace various existing water heaters, making it a versatile choice for RV owners looking to upgrade. The inclusion of a pressure relief valve and a wired remote controller further adds convenience, allowing control from a distance.

On the safety front, being CSA certified, it features several protective measures including anti-freezing protection, overheat protection, and an automatic gas shut-off, enhancing user confidence during use. This makes it a reliable option for those concerned about safety while on the road. However, there are some considerations to keep in mind. While its performance is commendable at high altitudes, the reliance on propane means users need to manage fuel levels, which could be a hassle during long trips. Additionally, while it excels in continuous hot water supply, potential users should ensure their RV's plumbing can handle the maximum flow rate without issues.

The Ranein 65,000 BTU RV tankless water heater is designed to provide continuous hot water for RV travelers, eliminating the usual wait time associated with traditional tank heaters. It offers a strong flow rate of up to 3.9 gallons per minute, which is usually enough for quick showers or washing. Powered by 12V DC and propane gas, it’s suitable for most RV setups that use these energy sources. Its size (15" by 15") fits standard RV heater openings, making replacement straightforward, especially if upgrading from popular brands like Suburban or Atwood.

The unit includes a thermostatic chamber that helps keep water temperature steady between 95°F and 124°F, reducing the risk of scalding — a handy safety feature for families or pets. Installation is made easier with the included external shower and a remote controller, plus it has a built-in pressure relief valve, so you don’t have to buy extra parts. Safety is well addressed here, with features like an automatic gas shutoff if the flame goes out, a forced exhaust fan for steady combustion, and an anti-freeze function that activates in cold weather to prevent damage.

One potential drawback is its weight at nearly 30 pounds, which might be a bit heavy for some users to handle during installation. Also, the maximum temperature tops out at 124°F, which is comfortable and safe, but warmer water lovers might find it a bit limiting. This model serves as a practical and efficient choice for RV owners who want a reliable, quiet heater with easy temperature control and added outdoor shower convenience.

The GIRARD Tankless RV Water Heater is designed to deliver consistent hot water for RV users. With a powerful output of 42,000 BTUs, it efficiently maintains a steady water flow and temperature, which is a significant strength for those relying on hot water during their travels. The onboard microprocessor helps to regulate the water temperature, preventing both cold spots and scalding, which enhances safety—a crucial aspect for any water heating system.

It operates quietly on 12V power, consuming much less energy compared to traditional tank water heaters. This feature not only saves on fuel but also makes it an eco-friendlier choice for RV enthusiasts looking to minimize their environmental impact. The digital control panel is user-friendly, allowing easy adjustments to temperature settings and providing continuous feedback on water temperature, which is great for monitoring and troubleshooting.

Potential buyers should note that professional installation is strongly recommended. While the unit is designed for easy installation, the complexity may be daunting for those who are not particularly handy. The product's lightweight design (22 pounds) is a plus for easy handling, but it's worth considering the installation space in your RV, as it has specific dimensions that need to be accommodated. The GIRARD Tankless RV Water Heater stands out for its efficiency and consistent performance, making it a solid choice for many RV users, especially those keen on minimizing their fuel consumption. Just be prepared for professional installation and consider your specific hot water needs.