Best RV Tankless Water Heater (2025): Top Picks, Buyer’s Guide, Reviews & More
There’s nothing better than a hot shower after a long day on the road—unless your RV runs out of hot water halfway through. Traditional RV water heaters are slow, bulky, and limited. Modern RV tankless water heaters change everything: instant hot water, endless supply, space savings, and real efficiency. Whether you’re a full-timer, weekend warrior, or boondocker, this guide covers the best RV tankless water heaters, what to look for, and how to enjoy reliable hot water anywhere your adventure takes you.
Quick Picks: Top RV Tankless Water Heaters
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Best Overall:
Girard 2GWHAM On-Demand Tankless Water Heater – Designed specifically for RVs with quiet operation and easy installation. -
Best Upgrade:
Furrion 2.4GPM RV Tankless Gas Water Heater – Digital control, high flow, and premium build for serious RVers. -
Best Budget:
Camplux 2.64 GPM Portable Propane Tankless Water Heater – Perfect for camping, outdoor showers, and seasonal RVs.
Buyer’s Guide: How to Choose the Best RV Tankless Water Heater
- Fit & Installation: Measure your existing cutout (height, width, depth). Many tankless RV heaters are designed as direct replacements for Suburban or Atwood tank models.
- Fuel Type: Most RV tankless models use propane. Some require 12V power for ignition and controls.
- GPM (Gallons Per Minute): Look for at least 1.5–2.5 GPM for showers and sinks. Higher GPM means more simultaneous use.
- Freeze Protection: If you camp in cold weather, choose a unit with built-in freeze protection for worry-free winter use.
- Controls: Digital temperature controls make it easy to set and hold your preferred temp, preventing scalds and cold surprises.
- Noise Level: Modern models are much quieter than old tank heaters—check reviews for real-world impressions.
- Reliability: RVs bounce, vibrate, and endure rough roads. Pick a unit with proven, road-tested durability and a good warranty.
How to Install an RV Tankless Water Heater (Overview)
- Turn off all power and LP gas to your RV.
- Remove the old tank water heater.
- Check the cutout size and frame; make any adjustments needed for the new unit.
- Install the new tankless unit per the manual, securing it with screws and sealing edges.
- Connect propane, 12V power, and water lines (use Teflon tape on threads).
- Test for leaks—propane and water.
- Restore power and LP gas. Prime and test the heater for hot water and proper operation.
Tip: Each model is a bit different—always follow your heater’s instructions, and consider professional installation for safety.
Detailed Reviews: Best RV Tankless Water Heaters
Girard 2GWHAM On-Demand Tankless Water Heater
- 2.4 GPM flow rate—runs showers and sinks at the same time
- 12V operation, uses minimal power, works off-grid with battery
- Freeze protection for year-round RVing
- No special LP gas adjustments needed for altitude
- Compact, lightweight, and quiet
Pros:
- True “on demand” hot water for RVs
- Easy DIY replacement for Suburban/Atwood tanks
- Low power draw—great for boondocking
Cons:
- Requires 12V connection
- No digital display (manual temp control only)
Final Verdict: The #1 choice for most RVers—reliable, efficient, and road-ready.
See it on Amazon
Furrion 2.4GPM RV Tankless Gas Water Heater
- Digital control panel for precise temperature
- 2.4 GPM—great for families and large RVs
- Designed as a direct replacement for Suburban 4/6-gal and Atwood 6/10-gal tanks
- Multiple safety protections: flameout, overheat, and freeze protection
- Sleek, modern look with easy-access panel
Pros:
- Modern controls and safety features
- Excellent customer support and warranty
- Reliable for all-season use
Cons:
- Pricier than manual models
- May require more involved installation
Final Verdict: The top pick for RVers wanting luxury, reliability, and total temperature control.
Check price on Amazon
Camplux 2.64 GPM Portable Propane Tankless Water Heater
- Perfect for outdoor showers, seasonal RVs, or “shower tents”
- Runs off propane cylinder—no wiring needed
- Includes showerhead and easy setup kit
- 2.64 GPM for strong flow, even with low water pressure
- Portable—take it camping, hunting, or use as a backup
Pros:
- Extremely affordable and versatile
- No permanent installation needed
- Great for cabins and campers
Cons:
- Not designed for in-wall RV use
- No freeze protection or built-in venting
Final Verdict: The best budget and portable solution for quick hot water anywhere.
See details on Amazon
Comparison Table: Top RV Tankless Water Heaters
| Model | GPM | Power | Freeze Protection | Digital Control | Best For | Price Link |
|---|---|---|---|---|---|---|
| Girard 2GWHAM | 2.4 | Propane/12V | Yes | No | Full-time RV, direct replacement | View |
| Furrion 2.4GPM | 2.4 | Propane/12V | Yes | Yes | Luxury RV, digital control | View |
| Camplux 2.64GPM | 2.64 | Propane | No | No | Portable/outdoor use | View |
FAQ: RV Tankless Water Heaters
- Are tankless water heaters safe for RV use?
Yes, as long as you install an RV-rated model and follow the manufacturer’s instructions. Built-in safety features are standard on modern units. - Can I install one myself?
If you’re comfortable with basic RV plumbing and wiring, yes. For gas and propane connections, many choose a professional install for safety. - Will I really get “endless” hot water?
Yes, within the heater’s GPM capacity and your RV’s water supply—no more waiting for a tank to heat up! - Do they work in winter?
Choose a model with freeze protection if you camp in cold climates, and always winterize your system before storing your RV. - Can I run multiple showers at once?
Check the GPM rating. For most RVs, one shower plus a sink is easy with these top models.
Conclusion
A tankless water heater is one of the best upgrades for RV comfort and convenience. With the right model, you’ll enjoy endless hot water, save space, and never worry about running out—no matter how far you roam. Pick one of the top choices above and make your next RV adventure even better!