10 Best Rv Tankless Water Heaters 2025 in the United States

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 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 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.