10 Best Rv Tankless Water Heaters 2025 in the United States

The Ranein 65,000 BTU RV Tankless Water Heater is a solid choice for RV owners looking for instant hot water. It offers a high flow rate of up to 3.9 GPM, ensuring a consistent supply of hot water on demand, ideal for those who dislike waiting for water to heat up. The unit is powered by propane and requires a 12V power supply, making it compatible with all RVs, though it's not electric. The heater's compact dimensions (15" x 15") facilitate easy installation, especially since it can replace various sizes of existing tank water heaters with appropriate door kits (sold separately).

The inclusion of a multi-function remote control allows users to monitor gas usage, voltage, and other parameters, which can be very convenient. Additionally, the product features staged combustion technology to maintain a steady temperature range of 95°F-124°F, enhancing comfort and propane efficiency. Safety features are robust, including a built-in forced exhaust fan for stable combustion, automatic gas shut-off for flame failure, and an anti-freeze device that activates at low temperatures.

However, the need to purchase the door separately adds to the cost and complexity of installation. The built-in pressure relief valve, CSA certification, and professional customer service are added benefits. This water heater is best suited for RV owners seeking a reliable, high-performance tankless water heater that offers advanced control and safety features.

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 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.