Ultimate Guide to RV Tankless Water Heaters: Stay Warm on the Go

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.

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.

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.

Camplux 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 5099A (SW12DE) 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.

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
Camplux 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 5099A	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. For example, the Girard GSWH-2 is known for its simple installation process.

How long does an RV tankless water heater last?

With proper maintenance, most units last over 10 years. Models like the Eccotemp i12-LP offer excellent durability when maintained correctly.

Do tankless water heaters work in freezing temperatures?

Many models include freeze protection, but verifying this feature before purchase is essential. The Girard GSWH-2 is one such model equipped with built-in freeze protection.

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

A 2–3 GPM flow rate is sufficient for most RV needs. The Furrion FWH09A-1-A offers 2.4 GPM, ideal for frequent use without sacrificing performance.

Are tankless water heaters energy-efficient?

Yes, they heat water on demand, avoiding standby energy loss, which makes them more efficient than traditional models. Consider the Suburban 5099A for quiet, eco-friendly operation with high efficiency.