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 Ranein 65,000 BTU RV Tankless Water Heater offers several strong features tailored for RV use. One of its standout advantages is the high flow rate of up to 3.9 gallons per minute, which ensures a consistent supply of hot water on demand, making it ideal for longer showers. The unit operates on a 12V DC power source and includes a built-in anti-freeze device, making it reliable in colder climates.

The product also features a multi-function remote control that allows you to monitor various aspects such as gas usage, voltage, and whether the anti-freeze device is active. This can be particularly handy for RV owners who need to manage resources efficiently while on the road. Additionally, the heater incorporates safety features like an automatic gas shut-off in case of flame failure and a forced exhaust fan for stable combustion. The CSA certification further adds to its reliability and safety credentials.

However, there are some drawbacks to consider. The unit does not come with the necessary door, which has to be purchased separately, adding to the cost. Installation might also require some adjustments, particularly if replacing older Suburban or Atwood models. Despite these minor downsides, this tankless water heater is a robust option for RV owners looking for efficiency and reliability in their hot water supply.

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.