For RV enthusiasts, comfort and convenience are paramount. One essential upgrade for an RV lifestyle is installing a tankless water heater. Unlike traditional water heaters, these modern units provide on-demand hot water without the limitations of a storage tank, making them a game-changer for road trips. This comprehensive guide explores everything you need to know about RV tankless water heaters, including their benefits, essential features to consider, and top-rated options available today.

What Are RV Tankless Water Heaters?

A tankless water heater for RVs is a small appliance that warms water on demand as it moves through the system, removing the necessity for a storage tank. These heaters use either propane or electricity to instantly heat water when needed, ensuring a continuous supply for showers, dishwashing, or other tasks.

Traditional RV water heaters have limited capacities (typically 6 to 10 gallons), leading to situations where hot water runs out quickly. Tankless models solve this problem by heating water only when required, making them more efficient and reliable. Moreover, due to their small dimensions, they are ideally suited for the confined areas of RVs. They can also generate long-term cost savings because of their energy-efficient design. Thanks to the technology used in these units, temperature control is accurate. This reduces the likelihood of scalding and enhances user safety overall. Moreover, RV tankless water heaters often have features like freeze protection and energy-saving modes, further enhancing their appeal to travelers.

By transitioning to a tankless system, RV owners can enjoy a hassle-free hot water experience that aligns perfectly with the demands of life on the road. Whether for solo travelers or families, these devices ensure comfort and convenience, making them a worthy investment.

Benefits of Tankless Water Heaters for RVs

Unending supply of hot water

With tankless systems, hot water flows continuously—ideal for long showers or immediate successive uses, as there’s no need to wait for a tank to refill and reheat.

This aspect primarily benefits more prominent families or groups traveling in an RV. With traditional water heaters, the limited capacity often means only the first few users get hot water, while others have to wait for the tank to refill. Tankless water heaters eliminate this problem by heating water on demand, ensuring everyone gets the same comfort level. Additionally, maintaining a steady flow of hot water enhances the convenience of multitasking, such as showering while washing dishes. Many tankless systems come with built-in freeze protection for those who frequently camp in colder climates, ensuring uninterrupted service even in sub-zero temperatures. This ensures their reliability for traveling in any season.

Energy Efficiency

Because tankless water heaters only turn on when there is a demand for hot water, they consume less energy than conventional models, which continuously heat and store water in a tank.

The on-demand nature of tankless water heaters means they don’t experience standby energy loss, a common issue with tank-based systems. With time, this can result in considerable savings on fuel or electricity costs, rendering them an environmentally friendly option for RV owners who are mindful of energy consumption. Furthermore, modern tankless systems are designed with advanced energy-saving features, such as low-flow detection and modulating burners, which adjust the heating output based on water usage. These advancements lower energy use and help prolong the unit’s lifespan, ensuring it continues to be a cost-effective solution for many years.

Space-Saving Design

Compact, lightweight tankless units are ideal for RVs with limited storage space. They can be affixed to walls or placed in small spaces.

Space in RVs is always limited, and every square inch matters. Tankless water heaters are designed with this in mind, offering a slim and unobtrusive profile that fits seamlessly into tight spaces; unlike traditional tanks, which require significant room for the unit and its water storage, tankless systems free up valuable storage areas for other essentials. Some models are even designed for exterior installation, further maximizing interior space. This compact design doesn’t compromise performance, as these units are built to deliver powerful heating capabilities in a small form factor.

Durability

Most tankless water heaters are designed to last longer than traditional units, with lifespans often exceeding 10 years with proper maintenance.

The durability of tankless water heaters stems from their high-quality components and advanced engineering. Unlike tank-based systems, which are prone to corrosion and mineral buildup, tankless models have fewer components in contact with water, reducing wear and tear. Additionally, many units feature self-cleaning mechanisms or scale detection systems that further enhance their longevity. Tankless water heaters represent a savvy and economical option for RV enthusiasts, resulting in fewer unit replacements and lower maintenance costs.

Environmentally Conscious Performance

Several tankless water heaters are engineered to minimize emissions, offering an eco-friendly solution for travelers prioritizing sustainability.

Tankless systems contribute to a smaller carbon footprint by using less energy and reducing waste. Some models are even designed to meet strict environmental standards, such as low NOx emissions, making them suitable for eco-friendly RV setups. Additionally, their efficient operation ensures that resources are used responsibly, aligning with the principles of sustainable travel.

Essential Characteristics to Weigh When Selecting a Tankless Water Heater for Your RV

Fuel Source

RV tankless water heaters can run on propane, electricity, or a combination. Propane models are more common and ideal for off-grid adventures, while electric models are better suited for RV parks with reliable hookups.

When selecting a fuel source, it’s essential to consider your typical travel destinations and energy needs. Propane-powered units offer greater flexibility for boondocking or camping in remote areas with unavailable electrical hookups. However, they require regular refueling, which can be inconvenient if propane supplies are scarce. On the other hand, electric models provide a clean and hassle-free solution but depend on reliable power sources. Some hybrid models combine the best of both worlds, allowing users to switch between propane and electricity based on availability. This versatility can be handy for extended trips or varying travel conditions.

Flow Rate

The flow rate, indicated in gallons per minute (GPM), represents the hot water the heater can deliver. A 2-3 GPM flow rate is generally adequate for an RV to handle concurrent activities such as showering and dishwashing.

The correct flow rate selection depends on your household’s water usage patterns. A lower flow rate may suffice for solo travelers or couples, while families or larger groups may require a higher capacity to avoid interruptions. External factors, such as water pressure and temperature, can also affect the unit’s actual performance. To ensure optimal results, look for models with adjustable settings or advanced sensors that adapt to varying conditions. This provides a consistent and reliable hot water supply, regardless of the situation.

Temperature Control

Look for models with adjustable temperature settings or digital displays for precise control over water temperature.

Modern tankless water heaters come equipped with user-friendly controls that enable users to set their preferred water temperature accurately. Digital displays provide real-time feedback, making it easy to monitor and adjust settings as needed. Some advanced models even include remote controls or smartphone integration, enabling users to manage their system from a distance. These features enhance convenience and improve safety by preventing accidental scalding or overheating.

Size and Weight

Ensure the unit fits within your RV’s designated space and does not exceed your vehicle’s weight limits.

Before purchasing a tankless water heater, measure the available space in your RV to ensure a proper fit. Consider factors such as ventilation requirements and mounting options, as these can impact installation. Additionally, check the unit’s weight to avoid overloading your vehicle. Lightweight models are particularly advantageous for maintaining fuel efficiency and overall performance.

Safety Features

Key safety features include flame failure protection, anti-freeze technology, and overheat protection.

Safety should be a top priority when choosing a tankless water heater. Features like flame failure protection ensure that the unit automatically shuts off if the flame goes out, preventing gas leaks. Anti-freeze technology is essential for cold-weather travel, as it prevents damage caused by freezing water inside the unit. Overheat protection safeguards against excessive temperatures, reducing the risk of burns or equipment failure. Selecting a model with robust safety features lets you enjoy peace of mind during your travels.

Ease of Installation

While some models are intended for DIY installation, others might need professional help. Depending on your skill level, consider how easy it is to set up.

Installation requirements will differ depending on the model and the existing setup of your RV. While some units come with comprehensive instructions for easy DIY installation, others may require specialized tools or expertise. If you’re unsure about your ability to install the system, it’s best to consult a professional to ensure proper setup and functionality. This is a time-saver and reduces the chance of mistakes or harm.

Top RV Tankless Water Heaters in 2025

Girard GSWH-2 Tankless Water Heater

• Flow Rate: 2.2 GPM
• Fuel Source: Propane
• Features: Adjustable thermostat, energy-efficient design, freeze protection.
• Why It’s Great: This model is compact, easy to install, and delivers reliable performance with minimal energy consumption.

Furrion FWH09A-1-A Tankless Water Heater

• Flow Rate: 2.4 GPM
• Fuel Source: Propane
• Features: High heating capacity, LED temperature display, durable construction.
• Why It’s Great: The Furrion’s user-friendly interface and robust build make it perfect for frequent travelers.

Complex Pro 1.58 GPM Portable Tankless Water Heater

• Flow Rate: 1.58 GPM
• Fuel Source: Propane
• Features: Lightweight, portable, easy to set up.
• Why It’s Great: Ideal for smaller RVs or those seeking a portable solution, this unit delivers consistent performance at an affordable price.

Eccotemp i12-LP Tankless Water Heater

• Flow Rate: 3.0 GPM
• Fuel Source: Propane
• Features: Sleek design, digital control panel, child lock.
• Why It’s Great: A stylish and powerful option for families, the Eccotemp combines aesthetics with functionality.

Suburban Nautilus On-Demand Water Heater

• Flow Rate: 2.6 GPM
• Fuel Source: Propane
• Features: High efficiency, low emissions, quiet operation.
• Why It’s Great: This model stands out for its eco-friendly design and whisper-quiet operation.

Installation Tips for RV Tankless Water Heaters

• Check Compatibility: Ensure the unit is compatible with your RV’s plumbing and fuel system.
• Follow Manufacturer Guidelines: Always adhere to the installation instructions provided by the manufacturer.
• Use Proper Ventilation: Propane models require adequate ventilation to prevent gas buildup.
• Seal Connections: Use high-quality sealant or tape to prevent leaks in water and gas lines.
• Test the System: After installation, test the heater to ensure it’s functioning correctly and safely.

Maintenance Tips for Longevity

• Regular Cleaning: Remove mineral buildup and debris to keep the system running smoothly.
• Check Connections: Inspect water and gas lines periodically for leaks or wear.
• Flush the System: Descale the heater every 6-12 months to prevent clogs.
• Monitor Performance: Watch for signs of reduced efficiency, such as inconsistent water temperature.
• Store Properly: During off-seasons, drain the system and protect it from freezing temperatures.

RV Tankless Water Heaters

Here’s a detailed table summarizing the RV tankless water heaters mentioned in the article:

Model	Flow Rate (GPM)	Fuel Source	Key Features	Best For
Girard GSWH-2	2.2	Propane	Adjustable thermostat, energy-efficient, freeze protection	Compact, easy-to-install option
Furrion FWH09A-1-A	2.4	Propane	High heating capacity, LED temperature display, durable construction	Frequent travelers seeking reliable performance
Complex Pro 1.58 GPM Portable	1.58	Propane	Lightweight, portable, easy setup	Smaller RVs or portable needs
Eccotemp i12-LP	3.0	Propane	Sleek design, digital control panel, child lock	Families looking for style and functionality
Suburban Nautilus	2.6	Propane	High efficiency, low emissions, quiet operation	Eco-conscious users prioritize quiet operation

FAQs

Can I install an RV tankless water heater myself?

Yes, many models are DIY-friendly, but depending on your skill level and RV setup, some may require professional installation.

How long does an RV tankless water heater last?

With proper maintenance, most units last over 10 years.

Do tankless water heaters work in freezing temperatures?

Many models include freeze protection, but verifying this feature before purchase is essential.

What is the ideal flow rate for an RV tankless water heater?

A 2-3 GPM flow rate is sufficient for most RV needs.

Are tankless water heaters energy-efficient?

Yes, they heat water on demand, avoiding standby energy loss, which makes them more efficient than traditional models.

Conclusion

RV tankless water heaters are a must-have for travelers seeking comfort, efficiency, and convenience. With their endless hot water supply, compact design, and energy-saving benefits, they elevate the RV experience. Considering aspects such as the type of fuel used, flow rate, and safety features will help you identify the ideal unit for your requirements.

Whether you choose a reliable brand like Girard, Furrion, or Camplux, upgrading to a tankless water heater will transform your RV into a true home on wheels. Take the plunge and enjoy the luxury of hot water wherever your adventures take you!