What is The Best Tankless Hot Water Heater for RV [In 2025]

Enjoying a relaxing hot shower or having endless hot water for cleaning dishes and hands is essential for an enjoyable RV experience. Investing in the right tankless hot water heater can make a world of difference in your RV lifestyle. In this comprehensive review, we’ll explore some of the top-rated tankless hot water heaters for RVs to help you make an informed decision.

5 Best Tankless Hot Water Heater for RV Reviews

1. 65,000 BTU RV Tankless Water Heater

Overview

The 65,000 BTU RV Tankless Water Heater is a powerful and efficient option that can provide continuous hot water for your RV. It features a multi-function remote control and is compatible with all RVs.

Specs

• 65,000 BTU heat output
• Up to 3.9 GPM hot water output
• Temperature range: 95°F – 124°F
• 12V power supply
• CSA certified
• High-altitude (9,800ft) operation

Pros

• Powerful heat output for continuous hot water
• Adjustable temperature settings
• Compatible with all RV models
• Includes a multi-function remote control
• Automatic anti-freeze protection

Cons

• Requires a separate door for installation
• May be more expensive than some competitors

2. RV Tankless Water Heater with White Door and Controller

Overview

This RV tankless water heater is a versatile option that can replace a wide range of existing RV water heaters. It features high-altitude operation, continuous hot water supply, and a sleek white door with a built-in controller.

Specs

• 55,000 BTU heat output
• Up to 3.5 GPM hot water output
• Temperature range: 95°F – 124°F
• 12V power supply
• Suitable for altitudes up to 10,000 feet

Pros

• Universal fit for various RV water heaters
• Continuous hot water supply without waiting
• Automatic anti-freeze protection
• Includes a built-in remote controller
• Compact and lightweight design

Cons

• May not provide as much hot water as higher BTU models
• Requires separate purchase of a door for installation

3. 55,000 BTU RV Instant Water Heater with Remote Controller

Overview

The OEVANT 55,000 BTU RV Instant Water Heater is a compact and user-friendly option that provides a constant flow of hot water for multiple showers. It features advanced technology to maintain stable water temperatures and prevent overheating.

Specs

• 55,000 BTU heat output
• Up to 3.5 GPM hot water output
• Temperature range: 95°F – 123°F
• 12V power supply
• 16″ x 16″ door size
• CSA certified

Pros

• Instant hot water supply without preheating
• Stable water temperatures with staged combustion technology
• Includes a built-in remote controller for easy temperature adjustment
• Compact and lightweight design
• Multiple safety features, including anti-freeze protection

Cons

• May not provide as much hot water output as higher BTU models
• Requires a separate door for installation

4. RV Tankless Water Heater with Remote Controller and Front Water Outlet

Overview

The FOGATTI RV Tankless Water Heater, InstaShower 7, is a versatile and high-performance option that can easily replace existing RV water heaters. It features a range of convenient features, including a front-mounted water outlet and a smart remote controller.

Specs

• 48,000 BTU heat output
• Up to 2.5 GPM hot water output
• Temperature range: 95°F – 123°F
• 12V power supply
• CSA certified
• High-altitude (9,800ft) operation

Pros

• Instant hot water delivery with tankless technology
• Staged combustion technology for consistent temperatures
• Includes a 6.6ft smart remote controller
• Front-mounted water outlet for convenient use
• Multiple door size options for easy replacement
• Automatic anti-freeze protection

Cons

• May not provide as much hot water output as higher BTU models
• Requires a separate door for installation

5. Girard Tankless RV Water Heater

Overview

The Girard Tankless RV Water Heater is a reliable and efficient option that provides on-demand hot water for your RV. It features an onboard microprocessor that ensures consistent water temperatures and easy troubleshooting.

Specs

• 42,000 BTU heat output
• Adjustable temperature range: 95°F – 124°F
• 12V power supply
• Onboard microprocessor for intelligent control
• Digital user control panel
• Freeze protection

Pros

• Consistent hot water temperature with intelligent microprocessor control
• Digital control panel for easy temperature adjustment and troubleshooting
• Quiet operation with a brushless motor
• Efficient propane usage compared to tank water heaters
• Easy installation to replace existing tank water heaters

Cons

• May not provide as much hot water output as higher BTU models
• Requires a separate door for installation
• Some users report durability issues after a few months of use

Buying Guide: Choosing the Best Tankless Hot Water Heater for Your RV

1. BTU Output

• Higher BTU output means more hot water and faster heating
• Consider the size of your RV and the number of people using hot water simultaneously
• Look for models with at least 45,000 BTU for optimal performance

2. Hot Water Output

• Measure the GPM (gallons per minute) of hot water output
• Aim for at least 2.5 GPM to ensure a comfortable shower experience
• Higher GPM can accommodate multiple users simultaneously

3. Temperature Range

• Look for models with an adjustable temperature range, typically between 95°F and 124°F
• This allows you to find the perfect water temperature for your needs
• Consider models with intelligent temperature control for consistent performance

4. Power Source

• Tankless water heaters for RVs typically run on 12V DC power
• Ensure the power supply in your RV is compatible with the heater’s requirements
• Some models may also have additional power options, such as propane or solar

5. Installation and Compatibility

• Measure the existing water heater opening in your RV to ensure a proper fit
• Look for models that can easily replace your existing tank water heater
• Some models may require a separate door for installation, so factor in the cost

FAQ

1. How do I know if a tankless water heater is compatible with my RV?

Check the dimensions of the existing water heater opening in your RV and compare it to the specifications of the tankless heater you’re considering. Ensure the door size and mounting requirements match your RV’s setup.

2. What is the minimum water flow required for a tankless water heater to function properly?

Most tankless water heaters for RVs require a minimum water flow of around 0.9-1.0 GPM to activate the heating system. Ensure your RV’s plumbing can provide this minimum flow rate.

3. How do I prevent the water heater from freezing in cold weather?

Look for tankless water heaters with built-in anti-freeze protection, which will automatically heat the water system when the temperature drops below a certain threshold to prevent freezing.

4. How much propane or electricity will a tankless water heater consume?

Tankless water heaters are generally more efficient than traditional tank-style heaters, consuming less propane or electricity. However, the actual consumption will depend on the model’s BTU rating and your usage patterns.

5. Can I install a tankless water heater myself, or should I hire a professional?

While some users with basic DIY skills may be able to install a tankless water heater, it’s generally recommended to have a professional perform the installation, especially if you’re not familiar with RV plumbing and electrical systems. Improper installation can lead to safety issues or damage to your RV.

Conclusion

Investing in the right tankless hot water heater can greatly enhance your RV experience, providing endless hot water, improved energy efficiency, and added convenience. By considering factors like BTU output, hot water flow, temperature range, power source, and installation compatibility, you can find the best tankless water heater to meet your RV’s needs. With the information provided in this comprehensive review, you can make an informed decision and enjoy the benefits of on-demand hot water during your RV adventures.