10 Best Rv Hot Water Heaters 2025 in the United States

The Ranein 65,000 BTU RV Tankless Water Heater is a capable and efficient option for RV owners seeking reliable hot water. One of its standout features is the high flow rate of 3.9 gallons per minute, which ensures a consistent hot water supply without the need for a tank. This makes it ideal for long showers or multiple uses back-to-back. The 65,000 BTU power rating further contributes to its ability to provide instant hot water on demand, enhancing user convenience.

This unit is designed to replace existing RV water heaters and fits standard openings, although it requires a separate door purchase, which could be considered a drawback in terms of convenience and cost. The unit's size and compatibility with Suburban and Atwood water heaters make it relatively easy to install for those with some DIY experience. The included multifunction remote control is a nice addition, offering users the ability to monitor gas usage, voltage, and other essential metrics, which enhances user control and safety.

The built-in constant temperature chamber prevents temperature fluctuations, providing a steady shower experience. Energy efficiency is also a highlight due to the staged combustion technology that adjusts the flame size to save propane gas during summer, making it cost-effective over time. Safety features like the forced exhaust fan, automatic gas shut-off, and anti-freeze device add to the unit's reliability and user peace of mind. However, the need for a 12-volt power supply means users must ensure their RV electrical systems are compatible. Despite a few minor inconveniences, its benefits such as constant temperature control, safety features, and energy efficiency make it a strong candidate for RV owners looking to upgrade their hot water system.

The Suburban MFG 5242A SW10D is a 10-gallon direct spark RV hot water heater. It runs on propane with an input of 12,000 BTU/hour, which is a common and efficient fuel source for RVs. With a recovery rate of 10.2 gallons per hour, it can quickly reheat the water, making it suitable for multiple showers or usage in a short amount of time.

The dimensions (16.22 inches in height and width, and 20.5 inches in depth) make it relatively compact, and it is designed for floor mounting, which should simplify installation for most RV layouts. Weighing 45.2 pounds when empty and 126.2 pounds when full, it is manageable for installation and daily use. The advanced corrosion protection and exclusive heat transfer technology are notable features that enhance durability and efficiency.

However, its maximum flow rate of 0.17 gallons per minute may be a limitation for those requiring higher water flow. Additionally, it is worth noting that it is not electric, relying completely on propane. Customer reviews rate it highly at 4.3 out of 5 stars, indicating general satisfaction with the product. It is a solid choice for RV owners looking for a reliable and efficient hot water solution, but those needing higher water flow or preferring electric options might need to consider alternatives.

The Suburban Advantage RV Tank Water Heater SW6D is a solid choice for RV owners looking for a reliable hot water solution. With a capacity of 6 gallons, it caters well to smaller RVs or camper setups, providing enough hot water for basic needs such as showers and dishwashing. The direct spark ignition (DSI) system is user-friendly, allowing you to control the heater from a remote switch, making startup convenient, especially during cold mornings.

One of its notable strengths is its recovery rate of 10.2 gallons per hour, which means that hot water is replenished quickly after use, ensuring that you’re not left without hot water during peak times. The compact size (12.75” x 12.75”) makes it relatively easy to install in tight spaces, a common challenge in RV setups.

The maximum flow rate of 0.17 gallons per minute might be limiting for larger families or those who require multiple hot water outlets to work simultaneously. Additionally, while 12,000 BTU input is decent, some users may prefer higher output for quicker heating in larger setups or colder climates. The weight of the unit, 33.3 lbs empty and 81.9 lbs full, is manageable but could be a concern for those looking to minimize overall weight in their RV. It lacks an indicator light, which could lead to uncertainty about the operational status of the unit. The Suburban SW6D is well-suited for those with smaller RVs looking for efficient, easy-to-use hot water heating, balancing good recovery rates with a compact design, though larger hot water demands might find its flow rate a bit lacking.