10 Best Rv Hot Water Heaters 2026 in the United States

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 MFG Suburban 5240A Water Heater is designed for RVs, boasting a 6-gallon capacity which is a standard size for such vehicles. Its dual-fuel type (electric and gas) offers flexibility depending on available resources. The fast recovery rate promises quick reheating of water, a significant benefit during extended usage. The ignition system is Direct Spark Ignition (DSI), which ensures reliable startups and ease of use.

The installation dimensions are compact (12.75” x 12.75” x 19.19”), making it suitable for tight spaces in RVs, and it includes a convenient exterior gas line connection for straightforward setup. The porcelain-lined steel tank offers durability and an anode rod to prevent corrosion increases its lifespan. However, at 36 pounds, it might be a bit heavy for some users to handle during installation.

With a wattage of 1440 watts and a heat output that supports a maximum flow rate of 16.2 gallons per minute, it performs well for most RV needs. Its energy efficiency is reasonable, but possibly not the highest in the market. The one-piece metal control housing is a nice touch to protect controls from weather conditions. Despite its benefits, those looking for a lightweight and highly energy-efficient option might need to consider other products. This unit is a solid choice for RV owners looking for a reliable, durable water heater with decent performance.

The FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, is tailored specifically for RV users who seek a reliable and efficient hot water solution. One of its standout features is its high altitude performance, making it ideal for those traveling to mountainous regions. The staged combustion technology not only maintains water temperature but also conserves propane, which can be a significant advantage during extended trips.

With a power output of 55,000 BTU, this unit can deliver up to 2.9 gallons per minute (GPM) of hot water. This capability means you won’t run out of hot water quickly, unlike traditional tank heaters that can leave you waiting for a refill. The convenience of continuous hot water is a major benefit for families or groups needing to shower one after another without delays.

The ease of replacement is another strength. The FOGATTI can fit into the existing spaces for several popular brands, which means less hassle during installation. It also comes with a handy remote controller and a door, minimizing additional costs and efforts for users. Safety features, including a pressure relief valve and automatic gas shut-off, provide peace of mind, making it a reliable choice for RVers. However, potential buyers should ensure their RV's setup can accommodate this unit's size and installation needs.