Looking to enjoy endless hot showers on the road? An LP tankless water heater for your RV offers reliable, on-demand hot water without taking up precious space. Perfect for adventurers and frequent travelers, these efficient heaters ensure comfort wherever your journey leads. Discover the top features, benefits, and tips to help you find the ideal tankless water heater for your RV lifestyle.
LP Tankless Water Heater for RV: Comparison Table
| Type / Model | Power Source | Flow Rate (GPM) | Max BTU | Size (inches) | Weight (lbs) | Indoor/Outdoor | Key Features |
|---|---|---|---|---|---|---|---|
| FOGATTI InstaShower 8 Plus | Propane, 12V | 2.9 | 55,000 | 15 x 15 | 25 | Indoor | High altitude, remote, anti-freeze |
| Girard 2GWHAM | Propane, 12V | 1.5 | 42,000 | 12.5 x 12.5 | 22 | Indoor | Energy efficient, microprocessor |
| PrecisionTemp RV-550 | Propane, 12V | 1.5 | 55,000 | 13.5 x 13.5 x 14.25 | 32 | Indoor | Wall vented, freeze protection |
| KINGRVER RV On-Demand | Propane, 12V | 2.2–3.9 | 43,000–65,000 | 12.7 x 12.7/door options | ~28–40 | Indoor | High altitude, digital display |
| Camplux Pro 6L Portable | Propane, batteries | 1.58 | 41,000 | 17.3 x 11.6 x 4.3 | 16 | Outdoor | Lightweight, showerhead, portable |
| Eccotemp L10 Outdoor | Propane, batteries | 2.6 | 68,000 | 28 x 17 x 6 | 27 | Outdoor | Showerhead, portable |
| Marey GA5PORT Portable | Propane, batteries | 1.5 | ~34,000 | 11.4 x 7 x 14.4 | 13 | Outdoor | Ultra-compact, lightweight |
Everyday Usage of LP Tankless Water Heaters in RVs
Endless Hot Water, Instantly
An LP (liquid propane) tankless water heater for your RV provides on-demand hot water the moment you turn on a tap. Unlike traditional tank heaters that store and slowly reheat a set amount, tankless units heat water only when needed, providing an uninterrupted stream for as long as your water and propane last.
Common Uses:
- Taking long, comfortable showers—no more racing against the tank’s limit.
- Doing dishes back-to-back after meals, even with friends or family on board.
- Laundry or rinsing off gear without waiting for a tank to reheat between jobs.
- Enjoying outdoor showers with portable models, especially after hiking, swimming, or time on the beach.
Real-World Scenarios
- Boondocking: The efficiency and instant heating are ideal for off-grid stays—only consuming propane when an actual demand exists.
- Full-time RV Living: Families or couples living on the road save energy and never argue over “who used up all the hot water.”
- Cold Climates: With anti-freeze and overheat protection, advanced models ensure functionality and reliability year-round.
Key Benefits of LP Tankless Water Heaters for RV
1. Unlimited Hot Water on Demand
No tank to empty means you can shower, wash dishes, and clean up without running out of hot water, as long as your propane and water hold out.
2. Superior Energy Efficiency
Because the burner only runs when you open a hot water tap, fuel consumption is much lower compared to tank heaters, saving both propane and money.
3. Space and Weight Savings
Tankless units are compact—freeing up storage that bulky tanks used to occupy. They also tend to be lighter, cutting down your vehicle’s load.
4. Consistent Temperature & Flow
Integrated microprocessors and thermostatic controls stabilize water temperature, so you won’t get the dreaded “cold water sandwich” effect found in some older models.
5. Flexible Installation & Application
Modern LP tankless heaters often drop right into the space previously used by a tanked unit. Portable models offer quick hookups for camping, outdoor showers, and more.
6. Suitability for Off-Grid & High-Altitude Use
Propane is easy to store and transport, and many heaters include altitude-adjustment modes, so you can enjoy hot water even deep in the mountains.
7. Advanced Safety Features
Overheat protection, flame-out sensors, freeze guards, and anti-scald technology protect both your RV’s water lines and its passengers.
How to Choose the Best LP Tankless Water Heater for Your RV
1. Fit & Compatibility
- Dimensions: Measure your existing water heater compartment and compare to the new unit’s size.
- Door Options: Some models come with optional doors in multiple sizes to fit different cutouts.
- Plumbing & Propane Lines: Ensure existing lines will match, or plan for professional installation if retrofitting.
2. Flow Rate (GPM)
- GPM Needs: Estimate the concurrent use (e.g., shower plus kitchen sink). For couples, 1.5–2.0 GPM often suffices; families may need 2.5+ GPM.
- Efficiency: Higher BTU and flow models handle 2 or more appliances running simultaneously.
3. BTU Capacity
- Higher BTU ratings mean faster, hotter water at higher flow. 40,000–65,000 BTU is typical; families or cold climbers may want the upper end.
4. Energy Source and Power Needs
- Standard LP: Most RVers use standard propane bottles or built-in tanks.
- Electric Ignition: Some models use batteries (portable), others require 12V DC, or rarely 120V AC for fans and controls.
5. Intended Use: Built-In vs. Portable
- Built-In: Permanent install, direct replacement, highest safety integration, better protection from weather/theft.
- Portable: Lightweight, outdoor use, easy to set up for showers or cleaning—ideal for vanlife, tailgating, and tent campers too.
6. Safety and Certifications
Always check for:
– CSA or other relevant safety certifications for RV use
– Safety features like anti-freeze, overheat protection, flameout, and pressure relief
– Appropriate venting for indoor units
7. Climate and Environmental Considerations
- Cold Weather: Get a model with freeze protection and a warranty covering colder climates.
- High Altitude: Look for units that adjust for thinner air, usually rated up to 9,000+ feet.
8. Budget
- Premium, feature-rich models may cost $500–$1,000+.
- Portable or entry-level units are available for $150–$400.
Practical Advice and Best Practices
Installation
- Use Existing Cutouts: Choose a model that fits your current cutout to simplify install.
- Professional Help: If re-routing propane or installing new vents, hire an RV technician.
- Seal Properly: The water heater compartment must be tightly sealed; leaks are a serious safety risk.
Usage Tips
- Pre-Start Checks: Ensure propane and water are turned on before activating.
- Water Flow Control: The hotter you want the water, the lower the flow you may need (especially in cold climates).
- Monitor Your Propane: Because you may use more hot water, monitor tank levels, especially when boondocking.
- Winterize: If leaving your RV in freezing temperatures, fully drain the system or use a unit with built-in freeze protection.
Maintenance
- Descale Regularly: Use vinegar or a tankless water heater cleaning solution annually, more in hard-water areas.
- Inspect for Leaks: Check lines, connectors, and the burner area frequently.
- Ventilation: For indoor units, inspect the venting/check for blockage before each trip.
General Best Practices
- Pick the Right GPM: Avoid buying more (or less) capacity than you need.
- Test Before Trips: Run a full check of the system at home before heading out.
- Read Manuals: Each brand has its own controls/calibration steps; review thoroughly for best performance.
LP Tankless Water Heater for RV: Technical Feature Comparison Table
| Model | Max Flow (GPM) | BTU | Power Source | Size (inches) | Weight | Cartridge Type | Freeze Protection | Digital Control | Notable Features |
|---|---|---|---|---|---|---|---|---|---|
| FOGATTI InstaShower 8+ | 2.9 | 55,000 | Propane, 12V | 15 x 15 | 25 lbs | Wall-mount/door | Yes | Remote | Fits many cutouts, high altitude mode |
| Girard 2GWHAM | 1.5 | 42,000 | Propane, 12V | 12.5 x 12.5 | 22 lbs | Wall-mount | Yes | Digital panel | Ultra-efficient, quiet motor |
| PrecisionTemp RV-550 | 1.5 | 55,000 | Propane, 12V | 13.5 x 13.5 x 14.25 | 32 lbs | Wall-mount | Yes | Hardware dial | Low power draw, 4-season |
| KINGRVER RV Heater | 2.2–3.9 | 43–65k | Propane, 12V | 12.7 x 12.7 ± doors | 28–40 | Wall-mount/door | Yes | LCD Display | Multi-door fit, altitude |
| Camplux Pro 6L | 1.58 | 41,000 | Propane, batteries | 17.3 x 11.6 x 4.3 | 16 lbs | Portable/handle | Anti-freeze | Manual dial | Outdoor use, lightweight |
| Eccotemp L10 | 2.6 | 68,000 | Propane, batteries | 28 x 17 x 6 | 27 lbs | Portable/hanging | N/A | Manual dial | Large outdoor, versatile |
| Marey GA5PORT | 1.5 | ~34,000 | Propane, batteries | 11.4 x 7 x 14.4 | 13 lbs | Portable/hanging | N/A | Manual dial | Compact, 2-battery ignition |
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Conclusion
Adopting an LP tankless water heater in your RV rewrites the rules of hot water use on the road. You get true on-demand performance, space efficiency, and lower energy costs—while enjoying those long, relaxing showers and easier dish duty.
Buyers should focus on fitting the heater to their RV layout and use needs, and closely scrutinize GPM, BTU, install type, and safety. With features like freeze protection, digital controls, and robust flow rates, today’s units serve every kind of traveler, from full-time RV families to weekend explorers.
Installation and upkeep have never been more straightforward, thanks to advances in design and controls. Give your RV the upgrade it deserves—choose the right LP tankless water heater and experience camping comfort on your own terms.
FAQ
-
What is an LP tankless water heater for RVs?
It’s an on-demand device powered by liquid propane that heats water only as you use it—meaning you get endless hot water for showers, dishes, and more without a bulky storage tank. -
How does an LP tankless water heater work in an RV?
Cold water passes through a heat exchanger, where it’s warmed instantly by a propane-powered burner when a hot faucet is opened. Once the tap closes, the heater shuts off, conserving energy. -
Are LP tankless water heaters safe for RV use?
Yes—modern units have multiple sensors for overheating, flame failure, water pressure, and freeze protection. Always ensure proper installation and venting, and check for certifications like CSA. -
Can I install a tankless water heater myself?
If replacing an existing propane unit with the same size, handy RVers may do it themselves. New installations requiring gas line work, venting, or electrical should be handled by professionals. -
How do I choose the right size or model for my RV?
Measure your existing heater’s compartment. Consider your typical hot water usage (number of people, simultaneous tasks), needed flow rate, and climate. Pick a model with matching GPM/BPU and proper fit. -
What’s the difference between built-in and portable models?
Built-in units mount permanently inside your RV, integrating with plumbing and propane. Portables are lightweight, take up less space, and can be set up outdoors for showers or utility use. -
How much propane does a tankless water heater use?
Usage depends on flow rate and water temperature rise, but tankless units are more efficient than tanks. Expect a 20 lb propane bottle to last for many days of combined normal shower and dish use. -
Do tankless water heaters work in cold climates?
Many models offer freeze protection. In extreme cold, always ensure the heater and lines are drained or heated when not in use to prevent freezing and damage. -
What maintenance do these heaters require?
Regularly descale the heat exchanger (especially in hard water areas), inspect hoses and connectors, and verify safe venting and ignition. Drain the system before winter storage if not in use year-round. -
Will a tankless water heater increase my RV resale value?
Yes—in most cases, newer, efficient tankless heaters are a major selling point, appealing to buyers looking for convenience, efficiency, and modern comfort features in an RV.