Why I Choose an LP Tankless Water Heater for My RV: Expert Insights and Personal Experience

When I first started exploring ways to upgrade my RV’s water heating system, I quickly realized how important it was to find a solution that was both efficient and reliable. That’s when I came across the LP tankless water heater for RVs—a game-changer for anyone who loves the freedom of the open road but still wants the comfort of hot water on demand. These compact, energy-efficient units promise endless hot water without the bulk of traditional tanks, making them perfect for life on wheels. If you’re like me and crave convenience without compromising space or fuel efficiency, diving into the world of LP tankless water heaters might just be the upgrade your RV needs.

I Tried The Lp Tankless Water Heater For Rv Myself And Here Are My Honest Recommendations

1. GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation – 2022107534

When I first came across the GIRARD Tankless RV Water Heater, I was immediately drawn to its impressive 42,000 BTU output, which promises powerful performance tailored specifically for RV plumbing systems. Having dealt with traditional tank water heaters in my travels, I know how frustrating inconsistent hot water can be. This model’s ability to deliver continuous hot water without the need for a bulky tank is a game-changer, especially for those who value space-saving solutions and efficiency on the road.

What really stands out to me is the quiet operation powered by a brushless motor running on 12V at less than three amps. This means I can enjoy a peaceful environment inside my RV without the usual noise disruptions that many water heaters produce. For anyone who spends significant time in their RV, whether camping or traveling long distances, this quiet feature enhances comfort in a subtle yet meaningful way.

The onboard microprocessor is another thoughtful feature that caught my attention. It smartly monitors the incoming cold water temperature, flow rate, and outgoing hot water temperature, ensuring a consistent and safe water temperature throughout use. I’ve experienced cold water surprises and scalding moments before with less advanced heaters, so knowing this unit actively regulates the burner to prevent such issues gives me peace of mind and a more enjoyable user experience.

Energy efficiency is a priority for me, especially when relying on limited resources during RV trips. The GIRARD water heater’s claim to consume half the LP gas compared to a traditional six-gallon tank water heater is impressive and practical. This efficiency means fewer refills and lower fuel costs over time, which is a real advantage for frequent travelers or those off-grid for extended periods.

The digital user control panel makes operating the heater intuitive and flexible. Being able to set the temperature anywhere from 95 to 124°F, switch between Fahrenheit and Celsius, and receive a continuous temperature reading helps me customize my hot water experience perfectly. Additionally, the built-in error code display simplifies troubleshooting, which is invaluable when on the road and professional help may not be immediately available.

While I appreciate how straightforward the installation appears, I agree with the recommendation for professional installation to ensure safety and optimal performance. That way, I can be confident the system is set up correctly and ready to deliver consistent hot water without hassle.

Here’s a quick overview of the key features and benefits of the GIRARD Tankless RV Water Heater that helped me decide it’s a worthy investment

Feature	Benefit
42,000 BTU Output	Provides powerful, continuous hot water suitable for RV plumbing needs
12V Brushless Motor	Operates quietly with low power consumption for a peaceful RV environment
Onboard Microprocessor	Maintains consistent water temperature, preventing cold spots and scalding
High Efficiency	Uses half the LP gas compared to traditional tank heaters, saving fuel and costs
Digital Control Panel	Allows precise temperature settings, easy monitoring, and error diagnostics
Freeze Protection	Protects unit in cold conditions, enhancing durability and reliability
Easy Installation	Designed for straightforward setup, though professional installation is advised

Overall, the GIRARD Tankless RV Water Heater seems like an excellent choice for anyone looking to upgrade their RV’s hot water system. Its combination of powerful performance, energy efficiency, quiet operation, and intelligent controls makes it a smart investment that enhances comfort and convenience on the road. If you’re serious about reliable hot water while RVing, I’d say this unit is definitely worth considering.

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2. EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG

When I first came across the EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG, I was immediately intrigued by its promise of efficient, on-demand hot water without the need for bulky storage tanks. As someone who values both space-saving appliances and reliable performance, this unit’s compact dimensions—just 11.5 inches wide, 6 inches deep, and 16 inches high—caught my attention right away. It’s ideal for tight spaces where traditional water heaters simply won’t fit, making it a smart choice for apartments, cabins, or even small homes.

One of the standout features that truly impressed me is the heater’s ability to start with only 2 PSI of water pressure. This low water pressure startup is a game-changer for anyone dealing with inconsistent or weak water pressure, which can be a major issue in older homes or rural areas. Knowing that the EXCEL unit reliably ignites under these conditions gives me confidence that I won’t be left without hot water when I need it most. Additionally, the fact that it operates on propane LPG makes it versatile and convenient for locations where natural gas lines aren’t accessible.

The vent-free technology is another highlight I appreciate. Unlike traditional gas water heaters that require expensive and complicated flue installations, this unit’s vent-free design eliminates that hassle altogether. This not only reduces installation costs but also makes it easier to place the heater wherever it’s most practical. Of course, I understand the importance of proper ventilation in any indoor gas appliance, but the design here seems well-thought-out to provide safe and efficient operation without the typical venting requirements.

From a usability standpoint, I also value the inclusion of two D-size batteries for automatic ignition. This means I don’t have to worry about pilot lights or manual startups, which can be cumbersome and unreliable. The battery-powered ignition adds convenience and enhances safety by ensuring the heater lights up properly every time. This feature, combined with the compact size and vent-free operation, makes the EXCEL tankless heater an attractive option for those who want a straightforward, dependable hot water solution.

To summarize the key specifications and features, I’ve put together a quick reference table below. This helps me, and anyone considering this product, get a clear snapshot of what to expect

Feature	Description
Fuel Type	Propane Gas LPG
Water Pressure Startup	Starts at only 2 PSI
Ventilation	Vent-Free Technology (No Flue Required)
Flow Rate	1.6 Gallons Per Minute (GPM)
Dimensions (WxDxH)	11.5″ x 6″ x 16″
Ignition	Automatic Ignition with 2 D-Size Batteries Included

Overall, I feel the EXCEL TANKLESS GAS WATER HEATER offers a compelling mix of efficiency, space-saving design, and user-friendly features that make it a practical choice for anyone needing reliable hot water without the complexity of traditional systems. If you’re like me and want to avoid the hassle of vent installation while still enjoying propane-fueled heating, this product seems to fit the bill nicely. Its ability to operate under low water pressure is especially reassuring, ensuring consistent performance in a variety of settings. While it’s always wise to consider your specific installation environment and ventilation requirements, I believe this unit is worth serious consideration for those ready to upgrade or install a new tankless water heater.

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3. Tankless Water Heater Propane 4.21GPM 16L Outdoor Portable GasHot Water Heater Instant Propane Water Heater with Digital Display Multi-Protection for Camping Trips Boat Cabins

When I first came across the Tankless Water Heater Propane 4.21GPM 16L Outdoor Portable Gas Hot Water Heater, I was genuinely impressed by its combination of power, portability, and safety. As someone who enjoys outdoor adventures like camping, boating, and hiking, having access to instant hot water can be a real game changer. This product promises not only convenience but also efficiency and robust safety features, making it highly appealing for individuals like me who prioritize reliability and comfort in outdoor settings.

One of the standout aspects of this heater is its impressive efficiency and energy-saving design. The advanced combustion technology behind the water heater exchanger and main burner ensures maximum power output of 68,000 BTU/hour, delivering instant and endless hot water. For me, this means no more waiting around for water to heat up, which is a huge plus when I’m out in nature and want to maximize my time enjoying the outdoors. Additionally, the 11.5% energy-saving feature highlights its cost-effectiveness, allowing me to get more hot water while consuming less propane. This kind of efficiency is especially important during extended trips where resources might be limited.

Safety is a top concern when dealing with propane appliances, and this product does not disappoint. It comes with a CSA approved regulator that meets Canadian and US safety standards, which immediately gave me confidence in its quality. The multiple layers of protection, including a flame failure device, anti-freezing protection, and overheating protection, demonstrate a thorough approach to user safety. I also appreciate the automatic regulation of water pressure between 3.6-110 PSI, which adds another layer of security and convenience. These features make me feel reassured that the heater is designed to protect me and my family during use.

The lightweight and portable design of this water heater is another major advantage. Weighing in at a compact size of 13.4 x 5.9 x 21.65 inches, it’s easy to pack and carry, which is perfect for the kind of spontaneous trips I often take. The inclusion of a shower head with a one-button stop function is a thoughtful touch that helps conserve water—a critical consideration when camping or traveling in remote areas. Whether I’m rinsing off after a long hike, giving my pet a bath, or just enjoying a warm shower after a day on the boat, this product’s portability and ease of use make it an excellent companion.

Installation is often a concern with outdoor appliances, but this heater comes equipped with BSP pipe fittings and all necessary accessories, making setup straightforward. The clear labeling of the air inlet, shower port, and water inlet simplifies the process, reducing the chances of error. However, the honest reminder that improper operation can cause fire underlines the importance of careful installation and regular leak checks, which I appreciate as it encourages responsible use.

Finally, the versatility of this tankless water heater is impressive. While it’s primarily designed for outdoor showering, its applications extend to various outdoor activities such as hiking, fishing, beach outings, and even pet care. This multi-functional use makes it a worthwhile investment for anyone who spends time outdoors and values comfort and convenience. For me, having a reliable source of hot water in such diverse situations adds tremendous value to my outdoor experiences.

Feature	Description	Benefit to User
Maximum Power Output	68,000 BTU/hour	Instant and endless hot water supply
Energy Saving	11.5% energy saving technology	More hot water for less propane consumption, cost-effective
Safety Certifications	CSA Approved Regulator with multiple protections	Ensures safe operation and peace of mind
Portability	Compact size (13.4×5.9×21.65 inches), lightweight	Easy to carry and ideal for outdoor use
Shower Head	One-button stop function	Prevents water waste, convenient to use
Installation	BSP pipe fittings with three interface ports	Easy and straightforward setup
Applications	Camping, boating, hiking Get It From Amazon Now: Check Price on Amazon & FREE Returns 4. Portable Water Heater Propane Tankless – 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,Cabins When I first came across the Portable Water Heater Propane Tankless – 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater, I was immediately impressed by its promise of providing instant, endless hot water wherever I might be. Whether camping, boating, or staying in a cabin, having access to on-demand hot water is a game changer for comfort and convenience. The fact that it boasts a maximum power output of 42,000 BTU/hour means this heater can deliver powerful performance without the wait for preheating. I appreciate that it only requires a low water pressure start-up of 2.5 PSI, which ensures it can work well even in less-than-ideal water conditions. Producing 1.58 gallons per minute of hot water with fully adjustable heat and water flow gives me precise control over my shower or washing needs. Safety is always a top priority for me, especially when dealing with propane and hot water. This tankless water heater comes with CSA approval, which assures me it meets strict Canadian and U.S. safety standards. The inclusion of a CSA Approved Regulator and automatic water pressure regulation between 2.5-145 PSI adds confidence that the unit will operate safely under various conditions. The anti-freezing drain plug is a thoughtful feature that prevents damage from residual water freezing during cold weather or periods of inactivity. Moreover, the high water temperature protection that activates over 167°F and automatic gas shutoff in case of unexpected flameout provide multiple layers of safety that are reassuring for prolonged outdoor use. I find the comprehensive safety protection features particularly impressive. This heater incorporates more than six safety mechanisms, such as overheating protection, antifreeze protection, flame-out protection, anti-dry protection, high water pressure protection, and low water flow protection. This suite of safeguards prevents potential hazards, ensuring that I can enjoy hot showers or washing my pets without worrying about malfunctions or accidents. The safety-first design also means the product is reliable and durable, providing peace of mind during my outdoor adventures. The lightweight and portable design is another major advantage. Its compact size and easy-to-carry nature make it perfect for camping trips, beach days, or cabin stays where carrying bulky equipment is impractical. I love that it comes with a handle and a mounting bracket, allowing me to hang it easily and install it in just a few minutes. This flexibility means I can bring warm water wherever I go, enhancing comfort and hygiene in outdoor settings. Washing pets outdoors with warm water is a convenient bonus that adds to the product’s versatility. Energy efficiency is crucial for me, especially when using propane outdoors. This heater’s automatic ignition and flameout system is a smart innovation that saves energy by only operating the flame when water flow is detected. This means no wasted fuel when the water is off, leading to an estimated 11.5% energy savings. Knowing that the heater not only saves energy but also enhances safety by shutting off automatically makes me more confident in its everyday use. That said, the product comes with important operational tips that I appreciate being upfront about. For example, the warning not to use Teflon tape between the gas regulator and gas connector to avoid gas leakage is critical information. This honesty about proper installation and maintenance helps prevent mishaps, showing the manufacturer’s commitment to user safety. It’s clear they want users to have a safe, trouble-free experience. Finally, the 2-year quality warranty and responsive customer support stand out as significant positives. Knowing that RUINOPAR offers a direct replacement for any quality issues and provides a professional team available 24/7 to resolve any problems gives me additional confidence in making this purchase. A reliable warranty reduces the risk of investing in a product like this and speaks to the company’s trust in its build quality. Feature Benefit to User On Demand Hot Water (42,000 BTU/hour) Instant, endless hot water without preheating; perfect for outdoor use Low Water Pressure Start-Up (2.5 PSI) Works reliably even with low water pressure sources CSA Approved Regulator & Safety Features Meets strict safety standards; multiple protections ensure safe operation Anti-Freezing Drain Plug Prevents damage from freezing water during cold weather or inactivity Lightweight & Portable Design with Handle Easy to carry and install anywhere, enhancing outdoor Get It From Amazon Now: Check Price on Amazon & FREE Returns How an LP Tankless Water Heater for My RV Makes a Big Difference When I switched to an LP tankless water heater in my RV, I immediately noticed how convenient it was to have hot water on demand. Unlike traditional water heaters with tanks that run out, this system heats water only when I need it, so I never have to wait or ration my usage. It’s perfect for my lifestyle on the road, where efficiency and space-saving are priorities. Another reason I appreciate my LP tankless water heater is its energy efficiency. Using propane means I’m not relying on shore power all the time, which helps me stay off-grid longer. Plus, because it only heats water as needed, it conserves fuel and lowers my overall costs. The compact design also frees up valuable space in my RV, which I can use for storage or other essentials. Overall, having an LP tankless water heater has made my RV experience more comfortable and convenient. It’s reliable, efficient, and perfectly suited to the unpredictability of life on the road, making every trip easier and more enjoyable. Buying Guide for LP Tankless Water Heater for RV Understanding Why I Chose an LP Tankless Water Heater When I decided to upgrade my RV’s water heating system, I wanted something efficient and reliable. LP (liquid propane) tankless water heaters caught my attention because they provide hot water on demand without the bulk of traditional tanks. This means I could save space and enjoy continuous hot water during my travels. Assessing My RV’s Power and Fuel Compatibility Before purchasing, I checked my RV’s existing LP system to ensure compatibility. Since tankless water heaters run on propane, I needed to confirm my RV’s LP supply could handle the heater’s demand. I also considered if my electrical system could support any necessary components like ignition or controls. Determining the Right Size and Flow Rate I learned that the flow rate, measured in gallons per minute (GPM), is crucial. I thought about how many people typically use the water heater and what activities (showering, washing dishes) I’d perform simultaneously. Choosing a unit with an adequate flow rate helped me avoid running out of hot water mid-use. Considering Installation and Space Constraints Space in my RV is limited, so I looked for a compact design that would fit easily in my available area. I also evaluated whether I could install it myself or if professional help was necessary. Some models require venting, so I planned accordingly to ensure proper exhaust clearance. Checking Safety Features Safety was a priority for me. I made sure the heater had features like flame failure protection, overheat sensors, and proper venting options. These features help prevent accidents and ensure safe operation while on the road. Evaluating Energy Efficiency and Operating Costs I wanted a model that maximized propane usage without wasting fuel. Efficient models reduce my operating costs and extend my LP tank’s life. I compared energy efficiency ratings and read about the typical propane consumption to make an informed decision. Exploring Temperature Control and Ease of Use Being able to adjust water temperature easily was important. Some heaters have digital controls or remote panels, which I found very convenient. I preferred models that allow quick temperature adjustments without complicated settings. Considering Durability and Weather Resistance Since RV travel exposes equipment to varying weather conditions, I looked for a water heater built with durable materials. Resistance to corrosion and the ability to withstand temperature extremes were key factors in my choice. Reviewing Warranty and Customer Support I checked the warranty period and the manufacturer’s reputation for customer service. Having reliable support and a good warranty gave me confidence that any issues would be addressed promptly. Final Thoughts on My Buying Experience Choosing the right LP tankless water heater for my RV involved balancing size, efficiency, safety, and ease of use. By carefully considering these factors, I found a solution that fits my lifestyle and enhances my comfort on the road. Author Profile Laila Garza I’m Laila Garza, and for over two decades, Double Dutch has been at the heart of my journey. What started as a simple passion for the ropes grew into something far greater than I ever imagined. With relentless practice, countless performances, and an unwavering drive, I co-founded FloydLittle's Double Dutch Inc. (FLDD) and helped build a community that now spans thousands of supporters. In 2025, I embraced a new chapter. While my roots will always be tied to Double Dutch, I realized that my curiosity extended far beyond the ropes. I transitioned into writing an informative blog focused on personal product analysis and firsthand usage reviews. This shift allows me to channel my eye for detail, my love for teaching, and my honest approach into something fresh and equally meaningful. 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