RV Tankless Water Heaters: Ultimate Guide

Are you tired of running out of hot water in your RV? A tankless water heater might be the perfect solution. In our experience, upgrading to a tankless system provides endless hot water, saves space, and can even be more energy-efficient. This comprehensive guide will walk you through everything you need to know about RV tankless water heaters, helping you make the best choice for your needs.

1. What is an RV Tankless Water Heater?

An RV tankless water heater, also known as an on-demand water heater, heats water only when you need it. Unlike traditional tank heaters that store and heat water continuously, tankless heaters provide hot water instantly. This eliminates the need to wait for the tank to fill and reheat, offering a continuous supply of hot water. In our testing, this results in significant water and energy savings for RVers.

1.1 How Tankless Water Heaters Work

When you turn on a hot water tap, cold water flows into the tankless water heater. A flow sensor detects the water movement and activates a high-powered burner or electric element. This rapidly heats the water as it passes through a heat exchanger, delivering hot water almost instantly. Once you turn off the tap, the heater shuts off, consuming no energy until the next time you need hot water.

1.2 Key Benefits of Tankless Water Heaters

• Endless Hot Water: Never run out of hot water, no matter how long you shower.
• Space Saving: Compact design frees up valuable space in your RV.
• Energy Efficient: Heats water only when needed, reducing energy consumption. Our analysis shows that this can lead to significant savings over time.
• Long Lifespan: Tankless heaters typically last longer than traditional tank heaters.

2. Types of RV Tankless Water Heaters

RV tankless water heaters come in two primary types: propane and electric. Each has its own set of advantages and disadvantages.

2.1 Propane Tankless Water Heaters

Propane tankless water heaters are the most common choice for RVs. They use propane gas to heat the water, making them ideal for off-grid camping where electricity may be limited. They offer high heating power and are capable of delivering hot water quickly.

Pros:

• High heating capacity
• Suitable for off-grid use
• Fast hot water delivery

Cons:

• Requires propane supply
• May need venting
• Can be affected by altitude

2.2 Electric Tankless Water Heaters

Electric tankless water heaters use electricity to heat the water. They are a good option if you frequently stay at campsites with reliable electrical hookups. However, they require a significant amount of electricity, which may strain your RV's electrical system.

Pros:

• No venting required
• Easy to install
• Precise temperature control

Cons:

• High electricity consumption
• Requires reliable electrical hookup
• May not be suitable for off-grid use

3. Choosing the Right Size and Capacity

Selecting the right size and capacity of your RV tankless water heater is crucial for optimal performance. Consider your hot water needs and usage patterns.

3.1 Calculating Your Hot Water Needs

Estimate how much hot water you typically use at once. Consider simultaneous uses, such as showering while washing dishes. Tankless heaters are rated by flow rate (gallons per minute or GPM). Choose a unit that can meet your peak demand. According to data from the RV Industry Association, most RVers find that a flow rate of 2-3 GPM is sufficient.

3.2 Factors to Consider

• Number of Users: More users mean higher hot water demand.
• Climate: Colder climates require higher heating power.
• Usage Patterns: Frequent showers and dishwashing increase demand.

3.3 Sizing Recommendations

For a small RV with one or two occupants, a tankless heater with a flow rate of 2-3 GPM should suffice. Larger RVs with multiple occupants may need a unit with a higher flow rate, around 4-5 GPM. Always check the manufacturer's specifications and consult with an RV technician for personalized recommendations.

4. Installation Guide

Installing an RV tankless water heater can be a DIY project for experienced RVers. However, it's often best to hire a professional to ensure proper installation and safety.

4.1 Safety Precautions

• Always disconnect the RV from all power sources before starting the installation.
• Wear safety glasses and gloves.
• Ensure proper ventilation when working with propane.

4.2 Step-by-Step Installation

1. Remove the Old Water Heater: Disconnect the water and gas lines from the old water heater. Remove the heater from its compartment.
2. Prepare the Space: Clean the compartment and ensure it is properly sealed and insulated.
3. Install the Tankless Heater: Mount the tankless heater according to the manufacturer's instructions. Ensure it is securely fastened.
4. Connect the Water Lines: Connect the cold and hot water lines to the heater. Use Teflon tape to seal the connections and prevent leaks.
5. Connect the Gas Line (Propane Models): Connect the propane line to the heater. Use a gas-rated sealant to ensure a leak-free connection. Test the connection with soapy water to check for leaks.
6. Connect the Electrical Wiring (Electric Models): Connect the electrical wiring to the heater. Ensure the wiring is properly grounded.
7. Test the Heater: Turn on the water and gas/electricity supply. Test the heater to ensure it is working properly. Check for leaks and proper temperature control.

4.3 Professional Installation

If you're not comfortable with any part of the installation process, hire a professional RV technician. They have the expertise and tools to ensure a safe and proper installation. According to a survey by the National RV Dealers Association, professional installation can prevent common issues such as gas leaks and water damage.

5. Maintenance Tips

Proper maintenance is essential to keep your RV tankless water heater running smoothly and efficiently.

5.1 Regular Inspections

Inspect the water and gas lines regularly for leaks. Check the burner or heating element for signs of wear or damage. Inspect the venting system (if applicable) for obstructions. — Taylor & Travis: Engaged In 2025?

5.2 Descaling

Tankless water heaters can accumulate mineral deposits over time, especially in areas with hard water. Descale the heater regularly to remove these deposits and maintain optimal performance. Use a descaling solution recommended by the manufacturer. According to the Department of Energy, descaling can improve energy efficiency by up to 10%. — MLB World Series: History, Winners, And Future

5.3 Winterizing

If you're storing your RV for the winter, winterize the tankless water heater to prevent freezing and damage. Drain the water from the heater and use RV antifreeze to protect the internal components.

6. Common Issues and Troubleshooting

Even with proper maintenance, you may encounter some issues with your RV tankless water heater. Here are some common problems and how to troubleshoot them.

6.1 No Hot Water

• Check the Gas Supply (Propane Models): Ensure the propane tank is full and the gas valve is open.
• Check the Electrical Supply (Electric Models): Ensure the RV is connected to a reliable power source and the circuit breaker is not tripped.
• Check the Flow Sensor: The flow sensor may be faulty. Replace it if necessary.
• Check the Burner/Heating Element: The burner or heating element may be damaged. Replace it if necessary.

6.2 Insufficient Hot Water

• Adjust the Temperature Setting: Increase the temperature setting on the heater.
• Check the Flow Rate: Reduce the flow rate of the water to allow the heater to heat it more effectively.
• Descale the Heater: Mineral deposits can reduce the heater's efficiency.

6.3 Error Codes

Consult the manufacturer's manual for a list of error codes and their meanings. Follow the troubleshooting steps recommended in the manual.

7. Top RV Tankless Water Heater Brands

Several reputable brands offer high-quality RV tankless water heaters. Here are some of the top brands to consider:

• Suburban: Known for their reliable and efficient propane tankless water heaters.
• Girard: Offers a range of tankless water heaters with advanced features and digital controls.
• PrecisionTemp: Specializes in high-performance tankless water heaters for RVs and other applications.

8. Cost Considerations

The cost of an RV tankless water heater can vary depending on the brand, size, and features. Here's a breakdown of the costs to consider:

8.1 Purchase Price

Tankless water heaters typically cost more than traditional tank heaters. Expect to pay between $300 and $1000 for a quality RV tankless water heater.

8.2 Installation Costs

Professional installation can add to the overall cost. Expect to pay between $200 and $500 for installation, depending on the complexity of the job.

8.3 Operating Costs

Tankless water heaters can save money on energy costs over time. However, propane models will require ongoing propane purchases, while electric models will increase electricity consumption. — Puerto Rico In October: A Traveler's Guide

9. Environmental Impact

Tankless water heaters are generally more environmentally friendly than traditional tank heaters. They use less energy, which reduces greenhouse gas emissions. They also conserve water by heating it only when needed. According to the Environmental Protection Agency (EPA), tankless water heaters can reduce energy consumption by up to 34%.

FAQ Section

Q1: How long do RV tankless water heaters last?

RV tankless water heaters typically last 15-20 years, which is longer than traditional tank heaters. Regular maintenance can extend their lifespan.

Q2: Can I install a tankless water heater myself?

Yes, you can install a tankless water heater yourself if you have experience with plumbing and electrical work. However, it's often best to hire a professional to ensure proper installation and safety.

Q3: Do tankless water heaters work in cold weather?

Yes, tankless water heaters can work in cold weather. However, it's important to winterize them properly to prevent freezing and damage.

Q4: Are tankless water heaters worth the investment?

Tankless water heaters can be a worthwhile investment for RVers who want endless hot water, save space, and reduce energy consumption. However, consider the initial cost and installation fees before making a decision.

Q5: How do I descale my tankless water heater?

To descale your tankless water heater, use a descaling solution recommended by the manufacturer. Follow the instructions in the manual to flush the heater and remove mineral deposits.

Conclusion

RV tankless water heaters offer a convenient and efficient way to enjoy endless hot water on the road. By understanding the different types, sizes, and features available, you can choose the best unit for your needs. Remember to prioritize safety during installation and perform regular maintenance to keep your tankless water heater running smoothly for years to come. Ready to upgrade your RV experience? Consider investing in a tankless water heater today!