When you're traveling in an RV, you'll need hot water. Whether you’re cleaning up after a meal or enjoying a relaxing shower, a reliable RV water heater can make all the difference.

In this guide, we’ll cover the most popular types of hot water heater RV models, and introduce top brands. Here you'll find everything you need to confidently select and buy RV water heaters.

When you're traveling in an RV, you'll need hot water. Whether you’re cleaning up after a meal or enjoying a relaxing shower, a reliable RV water heater can make all the difference.

In this guide, we’ll cover the most popular types of hot water heater RV models, and introduce top brands. Here you'll find everything you need to confidently select and buy RV water heaters.

There are a lot of choices when it comes to RV water heaters. The right option depends on factors like your source of energy, travel style, and heating needs. 

Below, we’ll break down the most common types of RV hot water heaters, including diesel, gas, electric, combined air and water heaters, and portable water heaters, so you can find the best fit for you.

Overview: Diesel water heaters use your RV’s diesel fuel for heating the water. These systems are excellent for RVers traveling in colder areas and those who want a reliable heating source that doesn't rely on propane or electricity.

Popular model: The Eberspacher Hydronic II D5S 12v Diesel Coolant Heater provides efficient engine and cabin pre-heating, ensuring smooth starts, fuel savings, and environmental benefits. Can be controlled by a timer, remote control, or the smartphone.

Overview: Gas-powered RV water heaters, such as propane, are among the most commonly used in RVs. They are especially useful for RVers who prefer to camp off-grid, as propane is widely available and doesn't rely on electrical hookups.

Popular model: Atwood Dometic WH-6GA Water Heater offers a reliable and compact option for RV owners who prefer a gas-only water heater. Many RV enthusiasts prefer it because of its durable construction and efficient heating.

Overview: Electric water heaters rely on your RV’s electrical system to heat water, making them a great option if you often stay in campgrounds with electrical outlets. These heaters are ideal for RVers who don’t need to worry about off-grid energy sources.

Popular model: The Suburban E-Series 120V Tank Water Heater provides a compact, fully electric design that doesn't require venting. The fully electric, flameless heating system is perfect for campground use, long lasting and easy to maintain.

Overview: Combined air and water heaters serve a dual duty: they provide both hot water and warm air to heat your RV. These heaters are typically diesel-powered and are great for RVers who want to save space and stay warm.

Popular model: Webasto Dual Top ST 6 is a combined diesel air and water heater. Designed with external mounting in mind and powered from the vehicle’s fuel tank, it’s a great space-saving solution, producing 6KW of heat.

Overview: Portable water heaters are a flexible option for smaller RVs, vans, or outdoor use. They’re typically powered by electricity or propane, and offer a simple, lightweight solution for those who don’t need a full-time water heating system.

Popular model: Eccotemp L10 is a top-rated and propane-powered portable tankless water heater that delivers instant hot water. Its compact size and simple setup make it perfect for camping, RVs, and outdoor showers.

When choosing the best water heater RV option, it’s essential to consider key factors like fuel efficiency, space, and your typical water usage.

Every type, from diesel to electric, has its strengths, and by knowing your own needs, you can make the best choice for your RV adventures. Here are the key considerations to keep in mind when choosing a water heater.

Diesel, Propane, or Electric?
The type of fuel your water heater uses is essential. If your RV already runs on diesel, a diesel water heater can be a natural fit. For those who like off-grid camping, propane water heaters might be more practical due to their ease of use in remote areas. If you stay at campgrounds with electrical hookups, then an electric water heater can provide an efficient and easy solution.

Ask yourself: Which fuel source works for you, and does it fit your travel style?

Instant vs. Tank-Based Heating
If quick access to hot water is a priority, you’ll want to pay attention to the heating speed of your water heater. Gas and diesel heaters usually heat water faster than electric models. In addition, some heaters, like tankless or on-demand systems, provide instant hot water without waiting for a tank to heat up.

Consider: Do you need hot water immediately, or can you wait for a few minutes?

How Much Hot Water Do You Need?
A lot depends on the size of your RV and the number of people traveling with you. Portable water heaters and smaller tankless models may be enough for solo travelers or couples, while larger families or full-timers may require a larger unit, such as a diesel combined air and water heater.

Think about: How much hot water do you use daily, and do you have the space for a larger heater?

Fuel and Power Usage
Energy efficiency is a big deal, especially for people who live off the grid. Diesel water heaters are known for their fuel efficiency, while propane water heaters tend to be more economical than electric heaters when dry camping. Be sure to consider how much fuel or power you'll consume, and how often you'll need to recharge or refuel.

Evaluate: Do you want to save fuel or have a reliable energy source?

Long-Term Reliability
Regular maintenance is required for any water heater, but some types require more care than others. Diesel water heaters and propane systems tend to be more resilient and capable of handling rough conditions, while electric water heaters may need fewer fuel-related repairs.

Question: How much maintenance are you comfortable doing, and how durable should your system be?

Permanent vs. Portable Solutions
If you have a larger RV, a permanently installed diesel water heater or combined air and water heater might be a good option. However, for van lifers or minimalists, portable water heaters are a great choice. They can be easily moved and set up outside the vehicle, ideal for quick outdoor showers or dishwashing.

Think: Do you prefer a stationary system, or is portability more important to you?

Cost vs. Long-Term Value
Finally, your budget will play a role in which water heater you choose. Diesel and combined air and water heaters are typically more expensive upfront but are more efficient and durable in the long run. Propane and portable water heaters are often more affordable, but you may sacrifice some convenience or capacity.

Ask: What’s your budget, and are you willing to invest long-term?

When choosing an RV water heater, picking a reliable brand is very important. A trustworthy brand can improve efficiency and customer satisfaction.

With a wide range of options on the market, here are some of the top brands known for their quality and performance in the RV water heater space:

Overview: Webasto is a well-known name in the RV and marine heating industry, specializing in diesel water heaters. Their products are built to last, making them a popular choice among full-time RVers and those who travel in colder climates.

Overview: Espar is another leading manufacturer of diesel heating systems, known for their innovative technology and designs. Their products are perfect for RVers looking for a reliable and effective heating solution.

Overview: Spheros heating systems have established themselves as leaders in coolant heating technology, offering reliable solutions for a wide range of industries and climates. Their coolant heaters are known for their exceptional efficiency and reliability.

Overview: Suburban is a trusted brand in the RV industry, offering a range of water heaters that cater to various needs, including gas and electric models. Many RVers trust their products because they are durable and user-friendly.

Overview: Atwood (now part of Dometic) is known for its innovative approach to RV appliances, including gas water heaters. Their products are built to provide efficiency and comfort, ideal for the needs of RVers.

Selecting the right RV water heater doesn't have to be a hassle. By considering factors like fuel source, heating speed, and your space requirements, you'll be able to pick the perfect RV water heater for your RV.

Now that you understand the different types, key features, and top brands, it's time to explore your options. Start by assessing your current setup, then visit our online store to find the perfect RV water heater for your next adventure!