Best Propane Tankless Water Heater for RVs

Traveling in an RV gives you the freedom to explore without giving up the comforts of home. But one comfort that can be tricky on the road is hot water. Whether you’re taking a shower after a long hike or washing dishes at a campsite, having a reliable hot water source makes all the difference. That’s why many RV owners are switching to a propane tankless water heater—and for good reason.

In this guide, we’ll explore the best propane tankless water heaters for RVs in 2025, what makes them great, how to choose the right one, and tips for installation and maintenance. Plus, we’ll talk about an often-overlooked part of your RV’s plumbing system that can save you from costly and smelly surprises.

Why Choose Propane for Your RV Tankless Water Heater?

While electric heaters have their place, propane is the go-to choice for many RVers. Here’s why:

  • Energy independence: Propane allows you to heat water without relying heavily on your RV’s electrical system, making it ideal for off-grid camping.
  • Faster heating: Propane units heat water quickly, even in colder weather or when the incoming water temperature is low.
  • Lower electrical load: Saves your battery and generator power for other appliances.
  • Compact designs: Most propane tankless units are designed to fit in standard RV water heater cutouts.

Best Overall: Girard 2GWHAM

The Girard 2GWHAM is one of the most popular propane tankless water heaters made specifically for RVs. It’s reliable, efficient, and built for the rigors of travel.

  • BTU rating: 42,000 BTUs for fast water heating.
  • 12V powered ignition system for easy starts.
  • Digital temperature control for precise adjustments.
  • Designed to fit most existing RV water heater openings.
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For most RV owners, the Girard 2GWHAM offers the perfect balance of performance and ease of use.

Other Top Propane Tankless Water Heaters for RVs

Suburban IW60 On-Demand Water Heater

Known for its high heating capacity, the Suburban IW60 delivers 60,000 BTUs of heating power—enough to provide strong flow rates even when multiple taps are running.

Furrion 2.4GPM Tankless RV Water Heater

Designed with vibration resistance for road travel, the Furrion model offers stable water temperatures and a compact design suitable for small to mid-size RVs.

Excel Vent-Free Gas Tankless Water Heater

Lightweight and vent-free, the Excel is a good choice for camper vans or small RVs. It’s budget-friendly and simple to install, though it’s best for light hot water use.

Camplux 5L Outdoor Portable Propane Water Heater

While technically portable, the Camplux 5L can be mounted for RV use. It’s ideal for seasonal campers who want a simple, affordable solution.

Key Features to Consider for RV Use

When choosing a propane tankless water heater for your RV, keep these in mind:

  • Size and weight: Space is limited in RVs, so compact and lightweight models are best.
  • BTU output: Higher BTUs mean faster heating and better performance in cold weather.
  • Flow rate (GPM): For RV use, 1.5–3 GPM is typical, but larger RVs may need more.
  • Durability: Road vibration and varying water quality can take a toll on your heater—choose a model built for RV conditions.
  • Ease of installation: Models designed for standard RV cutouts make upgrades easier.

Installation Tips

While some RVers install their heaters themselves, professional installation is recommended for safety and efficiency. This ensures proper propane line connection, ventilation, and water hookups.

  • Mount the unit securely to withstand road vibration.
  • Check for gas leaks after installation.
  • Follow manufacturer guidelines for clearance and ventilation.

Maintenance Tips for RV Tankless Water Heaters

Just like residential units, RV propane tankless heaters need regular upkeep:

  • Flush the heat exchanger annually to prevent scale buildup.
  • Inspect propane lines and fittings regularly.
  • Clean inlet screens to maintain water flow.

With proper care, a quality propane tankless water heater can last for many years of travel.

The Overlooked Side of RV Plumbing

It’s easy to focus on the “hot water in” part of your RV, but what about the “water out”? Many RVs use holding tanks or connect to septic systems at campsites. Without proper care, these can develop odors, clogs, and costly issues.

Unfortunately, many RV owners only think about tank maintenance when problems arise—which is usually too late to avoid an expensive repair.

SEPTIFIX – Keep Your RV Plumbing Fresh and Problem-Free

SEPTIFIX is the #1 septic and holding tank treatment in the US. These tablets dissolve in your toilet, releasing oxygen and beneficial bacteria to break down waste and neutralize odors.

Benefits include:

  • Eliminates odors within days.
  • Prevents buildup that can lead to clogs.
  • Safe for RV plumbing and campground septic systems.
  • Simple to use—just drop a tablet and flush.

Whether you’re a full-time RVer or a weekend traveler, SEPTIFIX helps keep your plumbing clean and worry-free.

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Final Thoughts

In 2025, the Girard 2GWHAM stands out as the best propane tankless water heater for RVs thanks to its compact design, high performance, and RV-specific engineering. However, the Suburban IW60, Furrion 2.4GPM, Excel Vent-Free, and Camplux 5L all offer solid performance depending on your RV size, travel style, and budget.

And remember—hot water is only part of your RV comfort. Keeping your holding tank or connected septic system healthy with SEPTIFIX ensures your travels are free from unpleasant surprises.

Order SEPTIFIX Today – Keep Your RV Holding Tank Fresh and Odor-Free

Endless hot water plus a clean, odor-free RV? That’s the perfect combination for stress-free adventures.

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