Best Propane Tankless Water Heater for RV: Tested and Reviewed

When it comes to RV living, one of the most essential comforts of home is a reliable hot water supply. Whether you’re camping in the mountains or parked by the beach, having a propane tankless water heater in your RV ensures you can enjoy hot showers, clean dishes, and much more without running out of hot water. But with so many options available, how do you choose the best one? In this guide, we’ve tested and reviewed the top propane tankless water heaters for RVs to help you make an informed decision. From flow rates to energy efficiency, we’ve covered everything you need to know to find the perfect fit for your adventures.

List of the Best Propane Tankless Water Heater for RV:

Check out the thorough review of the best propane tankless water heater for RV below.

1. FOGATTI RV Propane Tankless Water Heater

The FOGATTI InstaShower 8 Plus RV Tankless Water Heater sets a new benchmark for on-the-road comfort and efficiency. Designed for RV enthusiasts, this second-generation tankless water heater boasts industry-leading features, including a 55,000 BTU heating capacity and a flow rate of 2.9 gallons per minute (GPM). Unlike traditional 6-10 gallon tank heaters, it delivers uninterrupted hot water for over 40 minutes, making it ideal for continuous showering or high-demand usage. Additionally, the high-altitude compatibility ensures seamless operation up to 9,800 feet, providing RVers the freedom to explore without compromise.

The unit is engineered for durability and safety, with features such as dry combustion protection, overheat protection, and anti-freezing mechanisms. Its compact 15 x 15-inch frame and built-in pressure relief valve make it easy to install, while the included remote controller enhances convenience. Powered by propane, it ensures reliable heating without draining your RV’s electrical supply. Customers appreciate its ability to replace a wide range of water heaters, including models from Suburban, Atwood, and Girard, without major modifications.

Key Features

• High-altitude mode ensures smooth operation up to 9,800 feet.
• 55,000 BTU capacity provides 2.9 GPM continuous hot water.
• Multiple safety features including overheat and anti-freeze protection.
• Easy installation with a 15 x 15-inch door and included pressure relief valve.
• Propane-powered for efficient heating without electricity reliance.

Pros

• Delivers uninterrupted hot water for extended use.
• Compact design fits into small spaces.
• High-altitude compatibility enhances versatility.
• Easy replacement for existing RV water heaters.
• Reliable safety certifications and features.

Cons

• Higher initial cost compared to tanked heaters.

2. KINGRVER RV Propane Tankless Water Heater

The KINGRVER RV Tankless Water Heater delivers exceptional performance and reliability, making it an ideal choice for RV enthusiasts. With a compact 12.7″ x 12.7″ design, this propane-powered unit provides an endless hot water supply with adjustable temperatures ranging from 95°F to 123°F. Its compatibility with three optional door sizes (15″x15″, 15″x18″, and 18″x18″) ensures it fits seamlessly into all RVs, making it a versatile and convenient solution.

Thanks to its 43-watt operation and staged combustion technology, the heater intelligently modulates the flame for energy efficiency and steady temperatures. It excels at high altitudes, performing efficiently above 5,000 feet, ensuring a reliable hot water supply even in low-oxygen conditions. Built-in safety measures such as overheat protection, dry combustion prevention, and a 150 PSI pressure relief valve ensure peace of mind. Additionally, the anti-freezing feature activates below 42.8°F, protecting the unit from extreme temperatures.

Key Features

• Adjustable temperature from 95°F to 123°F.
• High-altitude compatibility above 5,000 feet.
• Staged combustion saves propane while maintaining steady temperatures.
• Compact design fits into multiple door sizes for versatile replacement.
• CSA-certified with 24/7 expert technical support.

Pros

• Endless hot water supply without preheating.
• Durable anti-freeze protection for low temperatures.
• Straightforward installation with clear instructions.
• High-altitude performance enhances usability.
• Two-year warranty ensures peace of mind.

Cons

• Door kits must be purchased separately.

3. Xenjum RV Propane Tankless Water Heater

The Xenjum RV Tankless Water Heater is a high-performance solution for instant hot water in your motorhome. With an impressive 65,000 BTU output, it delivers up to 3.9 gallons per minute (GPM) of continuous hot water. Unlike traditional tank water heaters, this unit eliminates wait times, offering instant hot water on demand for showers, dishwashing, or outdoor cleaning. Designed with versatility in mind, it fits openings between 13″ and 14.55″ and includes a 16.25″ x 16.25″ door, ensuring compatibility with Suburban, Atwood, Girard, and Furrion water heater models.

This propane-powered unit includes dual water outlets, making it ideal for both indoor and outdoor use. The integrated digital control panel allows users to adjust temperatures between 95°F and 124°F while ensuring stability with its thermostatic control system. Safety is a priority with flame-out protection, leak detection, and frost protection, all backed by CSA certification. Additionally, the included showerhead kit and remote controller enhance convenience.

Key Features

• 65,000 BTU output with 3.9 GPM continuous water flow.
• Compatible with multiple RV water heater models and door sizes.
• Dual water outlets for indoor and outdoor use.
• Adjustable temperature range of 95°F to 124°F.
• Digital control panel with error code display.

Pros

• Provides instant and endless hot water.
• Easy installation with included shower kit and remote controller.
• Safety-focused design with multiple protections.
• High compatibility with tanked and tankless RV systems.
• Affordable pricing with a 36-month warranty.

Cons

• Higher initial weight (40 lbs) than some alternatives.

4. forimo RV Propane Tankless Water Heater

The Forimo RV Tankless Water Heater is a cutting-edge solution for on-demand hot water, offering a high efficiency of 65,000 BTU and a flow rate of 3.9 GPM. Designed for RV and camper enthusiasts, this propane-powered unit provides instant hot water while saving up to 40% energy compared to traditional tank water heaters. Its stainless steel and copper construction ensures durability, high temperature resistance, and corrosion protection, making it a reliable companion for everyday use.

With a 12.6″ x 12.6″ opening and a 15″ x 15″ door, the Forimo heater is compatible with most RV setups and can replace traditional tank or tankless water heaters. It features advanced smart combustion technology, which modulates flame size to prevent overheating while conserving propane. Additionally, the unit runs efficiently at high altitudes and operates quietly with a DC motor that resists vibrations.

Key Features

• 65,000 BTU with 3.9 GPM instant hot water flow.
• Smart combustion technology prevents overheating and saves propane.
• Durable stainless steel and copper construction with corrosion resistance.
• Compact design fits most RV setups with a 15″ x 15″ door.
• Remote control for customizable temperature settings.

Pros

• Provides continuous hot water on demand.
• Energy-efficient, reducing propane usage.
• Quiet operation with a stable DC motor.
• Reliable safety features including pressure release valve and leak protection.
• High-altitude compatibility for versatile use.

Cons

• Limited maximum temperature increase to 123°F.

How to Choose the Best Propane Tankless Water Heater for RV?

If you’re an RV enthusiast, you know how important it is to have hot water on demand—whether it’s for a refreshing shower after a day of hiking or simply washing dishes.

Understand Your Hot Water Needs

Before diving into the technical details, take a moment to assess your specific needs. Ask yourself:

• How many people will be using the water heater?
• Will you need hot water for multiple appliances simultaneously, like a shower and a sink?
• What temperature rise do you need based on where you’ll be traveling?

Answering these questions will help you determine the right flow rate and power capacity for your propane tankless water heater.

Check the Flow Rate: How Much Hot Water Do You Need?

The flow rate of a tankless water heater is measured in gallons per minute (GPM). For RV use, you typically don’t need a high GPM since RVs have fewer water fixtures. Here’s a general guideline:

• Low demand (1-2 fixtures): Look for a water heater with a 1.5–2.0 GPM rating.
• Moderate demand (2-3 fixtures): Opt for a unit with a 2.5–3.0 GPM rating.
• High demand (multiple simultaneous uses): Consider a 3.5+ GPM unit.

If you plan to take showers back-to-back or use multiple faucets at once, choosing a higher GPM unit ensures you never run out of hot water.

Consider Size and Weight: Space Matters in an RV

Space is a premium in RVs, so you’ll want a compact and lightweight propane tankless water heater. Look for models designed specifically for RV use, as they are usually more compact and easier to install. Check the dimensions of the unit and ensure it fits in the available space without compromising ventilation or safety.

Efficiency and Energy Savings: Keep Your Propane Usage Low

A propane tankless water heater should be energy-efficient to minimize propane usage during your travels. Look for models with:

• High Energy Factor (EF): This measures how efficiently the unit converts energy into hot water.
• Adjustable Burners: Some heaters allow you to adjust the flame to save fuel.
• Auto Shut-Off Features: These prevent propane waste when the heater isn’t in use.

Investing in an efficient model may cost more upfront but can save you money in the long run.

Safety Features: Prioritize Peace of Mind

When dealing with propane appliances, safety is non-negotiable. Look for features like:

• Anti-freeze Protection: Essential for cold-weather RV trips.
• Overheat Protection: Prevents the unit from reaching dangerous temperatures.
• Flame Failure Devices: Automatically shut off the propane supply if the flame goes out.

Having these features ensures you and your family can enjoy hot water safely, no matter where your travels take you.

Noise Levels: Keep the Comfort Quiet

Nobody wants a water heater that roars like a lion every time it’s turned on. Look for models with noise-reducing features or reviews that mention quiet operation. This is especially important if your RV layout places the water heater near sleeping or living areas.

Installation Requirements: DIY or Professional Help?

Some propane tankless water heaters are easy to install with minimal tools, while others may require professional assistance. Consider your level of experience with RV modifications and whether you’re comfortable handling propane connections. If not, don’t hesitate to seek professional help—it’s worth it for your safety.

Budget: Find the Sweet Spot Between Cost and Features

Propane tankless water heaters vary widely in price, so set a realistic budget. While it may be tempting to go for the cheapest option, remember that durability, efficiency, and safety features are worth the investment. Aim for a balance between affordability and quality.

Why Propane Tankless Water Heaters Are Perfect for RVs?

Unlike traditional tank water heaters, propane tankless units only heat water as you need it. This means you save propane, avoid running out of hot water, and enjoy a steady supply no matter how long your shower is. Additionally, propane is widely available, making it ideal for off-grid adventures.

Frequently Asked Questions When Selecting the Best Propane Tankless Water Heater for RV

1. What is a propane tankless water heater, and how does it work?

A propane tankless water heater is a compact unit that heats water on demand using propane gas. Unlike traditional water heaters with storage tanks, it doesn’t store hot water but heats it as it flows through the system. When you turn on a faucet, cold water enters the heater, passes over a heat exchanger powered by propane, and comes out hot almost instantly.

2. Why should I choose a propane tankless water heater for my RV?

Propane tankless water heaters are ideal for RVs because they save space, provide unlimited hot water on demand, and are energy-efficient. They’re particularly useful for off-grid trips since propane is readily available and efficient to use. Additionally, their compact design makes them easy to install in RVs where space is limited.

3. What size propane tankless water heater is suitable for an RV?

The size depends on your hot water needs, typically measured in gallons per minute (GPM). For RV use:

• A unit with 1.5–2.0 GPM is sufficient for single fixture use, like a shower.
• For multiple fixtures (shower and sink), a unit with 2.5–3.0 GPM is better.
• Larger families or higher demand may require units with a 3.5+ GPM flow rate.

4. Are propane tankless water heaters safe for RVs?

Yes, they are safe when properly installed and used. Look for models with built-in safety features like flame failure protection, anti-freeze systems, and overheat protection. Regular maintenance and proper ventilation are essential to ensure safe operation.

5. How do I install a propane tankless water heater in my RV?

Most RV-specific propane tankless water heaters come with installation kits and instructions. The steps typically include:

1. Securing the unit in the designated space.
2. Connecting the propane supply line.
3. Attaching water inlet and outlet pipes.
4. Ensuring proper ventilation for exhaust gases.
   If you’re unsure about installation or propane connections, it’s recommended to hire a professional.

6. How energy-efficient are propane tankless water heaters for RVs?

Propane tankless water heaters are highly efficient because they only heat water when needed, reducing energy waste. Models with high Energy Factor (EF) ratings or certifications like Energy Star are particularly efficient, making them cost-effective in the long term.

7. Can propane tankless water heaters work in cold weather?

Yes, many propane tankless water heaters are designed with anti-freeze protection, allowing them to operate in freezing temperatures. However, it’s important to insulate the water pipes and ensure the unit is protected from extreme weather conditions to prevent damage.

8. What are the main factors to consider when choosing a propane tankless water heater for an RV?

Key factors include:

• Flow Rate (GPM): Based on your hot water needs.
• Size and Weight: To fit within your RV’s space constraints.
• Efficiency: Choose models with high EF ratings to save fuel.
• Safety Features: Look for overheat protection, anti-freeze, and flame failure systems.
• Ease of Installation: Ensure it’s compatible with your RV setup.

9. How much does a propane tankless water heater for an RV cost?

Prices vary depending on the brand, size, and features. Basic models start around $150, while more advanced units with higher flow rates and added features can cost $400 or more.

10. How do I maintain a propane tankless water heater in my RV?

Regular maintenance ensures optimal performance and longevity. Key maintenance tasks include:

• Cleaning the water filter regularly to prevent clogs.
• Descaling the unit every 6-12 months to remove mineral buildup.
• Inspecting propane connections for leaks.
• Ensuring the venting system is clear and functioning properly.

11. Are there portable propane tankless water heaters for RVs?

Yes, portable models like the Camplux or Eccotemp are popular for RVs. They’re lightweight, easy to set up, and often include features for outdoor use. These are great for smaller RVs or when you need flexibility in installation.

12. How long do propane tankless water heaters last?

With proper care, a propane tankless water heater can last 10-15 years. Regular maintenance, such as descaling and cleaning, can significantly extend the lifespan of your unit.

13. Can I use a propane tankless water heater for both indoor and outdoor RV setups?

Some models are designed for dual use, but always check the manufacturer’s specifications. Indoor units require proper ventilation, while outdoor models are built to withstand the elements but may need to be protected in harsh weather.

14. How do I choose the most reliable brand for my RV propane tankless water heater?

Look for reputable brands like Girard, Camplux, Eccotemp, and Suburban, which specialize in RV water heaters. Read customer reviews and prioritize models with strong ratings for durability, efficiency, and performance.

15. What is the difference between a tank and a tankless water heater for RVs?

The primary difference is that tank water heaters store and heat a limited amount of water in a tank, while tankless units heat water on demand as it flows through the system. Tankless water heaters are more compact, energy-efficient, and provide an endless supply of hot water, making them ideal for RV use.

16. What are the common problems with propane tankless water heaters, and how can I fix them?

Common issues include:

• Cold water bursts: Often caused by improper installation or delays in ignition.
• Low water pressure: Check for clogs in the water filter or pipes.
• Unit won’t ignite: Ensure propane supply is sufficient and connections are secure.
  If problems persist, refer to the user manual or consult a professional.

17. Can I run a propane tankless water heater on low propane levels?

Most models require a consistent propane supply to function effectively. Running on low propane levels can cause performance issues or prevent the unit from igniting. Always ensure your propane tank is sufficiently filled before use.

18. What should I do if my propane tankless water heater stops working?

First, troubleshoot common issues:

• Check the propane supply.
• Inspect for blockages in water lines or the venting system.
• Ensure all connections are secure.
  If the problem persists, consult the user manual or contact customer support for assistance.

Conclusion

Choosing the best propane tankless water heater for your RV can transform your camping trips, adding convenience and comfort to every journey. After testing and reviewing the top models on the market, we’ve identified options that cater to a variety of needs, budgets, and preferences.

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