10 Best Rv Tankless Water Heaters

The Girard Tankless Water Heater is designed specifically for RV use, offering a strong 42,000 BTU output that ensures a steady supply of hot water. It runs quietly and efficiently on 12V power, using less propane than typical 6-gallon tank heaters, which can help save fuel on the road. The built-in microprocessor helps keep water temperature consistent by monitoring the cold water input and flow, reducing the chance of cold spots or sudden temperature spikes. This means you get a comfortable, stable hot water flow for showers and washing.

The digital control panel is a nice touch, letting you easily adjust the temperature between 95°F and 124°F and even switch between Fahrenheit and Celsius. It also shows error codes, which can help with troubleshooting if something goes wrong. In terms of size, it’s moderately compact but does require professional installation, so it’s better suited for RV owners comfortable with a more involved setup.

The heater’s design and gas efficiency make it a smart choice for those wanting reliable hot water without wasting fuel. Since it relies on propane and 12V power, it may not be ideal for all RV setups, especially if you prefer electric-only solutions. Additionally, if you often camp in freezing temperatures, extra cold weather protection might be necessary.

The Furrion RV Tankless Gas Water Heater offers a solid option for RV owners looking for on-demand hot water with steady temperature control. It uses propane, a common and convenient fuel source for RVs, delivering a decent flow rate of 2.4 gallons per minute—enough for typical showering and basic water needs. The water heater's Vortex technology helps maintain consistent temperature by mixing water accurately, which is a plus if you want reliable warmth without sudden changes. It's also designed to work well in colder weather down to 32ºF, which is important if you camp in cooler climates.

Installation-wise, it fits a 16.14" x 16.14" door size, making it a good replacement for Suburban 4 or 6-gallon models, so upgrading an existing system should be straightforward. The product is built tough with vibration-resistant parts, ideal for the bumps and shakes of road travel. It runs on 12 volts with electric ignition, simplifying startup.

The 2.4 GPM flow rate is moderate and might feel a bit limited if multiple water outlets are used simultaneously. The warranty is one year, which is decent but shorter than some competitors. Some users may find the unit's weight (around 20 kg) a bit heavy for installation. While it performs well at freezing temperatures, it may not be the best choice for extremely cold environments without additional insulation or heating solutions. This Furrion model suits RV users who want efficient propane-powered tankless water heating with steady temperature control and easy replacement installation. It is a durable and reliable choice for most typical RV camping conditions, though those needing higher hot water flow or extensive cold climate use might look at other options.

The Ranein 65,000 BTU RV Tankless Water Heater is a solid choice for RV owners seeking instant hot water without waiting for a tank to heat up. It runs on propane, delivering up to 3.9 gallons per minute, which should be enough for showers and other common RV needs. Its design fits standard RV cutouts (12.8” x 12.8”) and can replace many popular models like Suburban or Atwood, making installation straightforward. The upgraded remote control is a helpful feature, showing gas usage, voltage, and water flow, plus notifying you if the anti-freeze system activates — important for colder climates like Canada. Temperature control is steady within 95°F to 124°F, using staged combustion to avoid overheating and conserve propane, which is efficient for long trips.

Safety features include a pressure relief valve built-in, a forced exhaust fan for cleaner combustion, and automatic gas shut-off if the flame goes out, giving peace of mind. Notably, it has an anti-freeze device that turns on below 42.8°F, helping prevent freezing issues during cold weather. On the downside, it requires a 12V electrical connection and propane fuel, so users without propane setups or different voltage systems need to consider compatibility. The unit is relatively light at 2.5 kg and waterproof, with added mosquito-proofing, suitable for outdoor RV conditions. If you want an efficient, quiet, and easy-to-install propane tankless heater with smart controls that work well in cold weather, this model is worth considering for your RV.