An RV tankless water heater replaces the old 6- or 10-gallon tank with on-demand hot water, so the last person in line still gets a warm shower. RV models run on propane with a 12V DC control board and are built to fit the standard exterior door opening, usually 15 x 15 inches. These five are the best RV tankless heaters we found for weekend campers and full-timers.
We compared BTU output, flow, door sizes, altitude and freeze features using manufacturer specifications and owner feedback. For home units see the best tankless water heater; our Editorial Policy explains how we choose. Propane appliances in an RV should be installed by a qualified RV technician, and your RV needs working CO and LP gas alarms.
Top 3 Best RV Tankless Water Heaters
Ranein RA65LH 65,000 BTU RV Tankless Water Heater
- 65,000 BTU
- 3.9 GPM
- Thermostatic
Furrion FWH09AFA-AM 60,000 BTU RV Tankless Water Heater
- Vortex
- 2.4 GPM
- Anti-freeze
FOGATTI InstaShower 8 Plus RV Tankless Water Heater
- To 9,800 ft
- 2.9 GPM
- 3 door sizes
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RV Tankless Water Heaters Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  Ranein RA65LH 65,000 BTU RV Tankless Water Heater |
| Check Latest Price |
| 2 |  Furrion FWH09AFA-AM 60,000 BTU RV Tankless Water Heater |
| Check Latest Price |
| 3 |  FOGATTI InstaShower 8 Plus RV Tankless Water Heater |
| Check Latest Price |
| 4 |  VEVOR TM-RV03-2 55,000 BTU RV Tankless Water Heater |
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| 5 |  RecPro RP-1057 42,000 BTU RV Tankless Water Heater |
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1. Ranein RA65LH 65,000 BTU RV Tankless Water Heater
Best Overall
- 65,000 BTU, up to 3.9 GPM
- Thermostatic mixing chamber
- High altitude mode
- Anti-freezing and dry combustion protection
- Higher propane draw
- Check door fit
- Fuel: propane, 12V DC
- Flow: up to 3.9 GPM
- Model: RA65LH
Ranein’s RA65LH has the most output here for back-to-back showers.
Its mixing chamber helps keep temperatures even.
Who the Ranein RA65LH fits best
Families and full-timers.
Who should skip the Ranein RA65LH
Small trailers.
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2. Furrion FWH09AFA-AM 60,000 BTU RV Tankless Water Heater
Best Steady Temp
- 60,000 BTU, 2.4 GPM
- Vortex technology premixes water
- Antifreeze protection
- Pressure relief and over-temperature protection
- Lower flow
- Wall thermostat to mount
- Fuel: propane
- Flow: 2.4 GPM
- Model: FWH09AFA-AM
Furrion’s vortex design helps prevent cold spots and scalding.
A wall thermostat is included.
Who the Furrion 60,000 BTU fits best
Couples and small families.
Who should skip the Furrion 60,000 BTU
Big families.
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3. FOGATTI InstaShower 8 Plus RV Tankless Water Heater
Best for High Altitude
- High-altitude mode to 9,800 ft
- 55,000 BTU, 2.9 GPM
- Three door sizes for retrofit
- Low water pressure start-up
- Mid output
- Remote to mount
- Fuel: propane, 12V DC
- Flow: 2.9 GPM
- Model: FS08B1SBD
FOGATTI’s staged combustion adjusts for season and altitude.
Three door options ease retrofits.
Who the FOGATTI InstaShower 8 Plus fits best
Mountain travelers.
Who should skip the FOGATTI InstaShower 8 Plus
Max-flow needs.
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4. VEVOR TM-RV03-2 55,000 BTU RV Tankless Water Heater
Best Value
- 55,000 BTU output
- 15 x 15 in door
- Remote controller
- Segmented combustion for seasons
- Single door size
- Basic controls
- Fuel: propane, 12V DC
- Door: 15 x 15 in
- Model: TM-RV03-2
VEVOR’s 55,000 BTU unit covers the basics for weekend trips.
It fits standard openings.
Who the VEVOR 55,000 BTU fits best
Weekend campers.
Who should skip the VEVOR 55,000 BTU
Full-timers wanting top flow.
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5. RecPro RP-1057 42,000 BTU RV Tankless Water Heater
Best Compact
- 42,000 BTU
- Copper heat exchanger
- 15 x 15 or 18 x 18 in doors
- Automatic ignition, low pressure start
- Lowest output
- One shower at a time
- Fuel: propane, 12V
- Output: 42,000 BTU
- Model: RP-1057-42BTU
RecPro’s smaller unit suits light use and small rigs.
Choose the door size you need.
Who the RecPro 42,000 BTU fits best
Small trailers.
Who should skip the RecPro 42,000 BTU
Families.
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RV Tankless Buying Tips
- Measure your door opening (15 x 15 or 18 x 18 in).
- Pick higher BTU for cold water and families.
- Winterize per the manual.
- Keep CO and LP alarms working.
Frequently Asked Questions
What is the best tankless water heater for an RV?
The Ranein RA65LH for output; the Furrion 60,000 BTU for steady temperature.
Will it fit my RV?
Most fit 15 x 15 in openings; check your door.
Do RV tankless heaters work at altitude?
Models like FOGATTI offer high altitude modes.
Do they need winterizing?
Yes, follow the manual.
Final Verdict: Best Tankless Water Heater for RV
The Ranein RA65LH is the best RV tankless water heater overall. The Furrion 60,000 BTU keeps temperatures steadiest, and the FOGATTI InstaShower 8 Plus is best at altitude.
Best overall: Ranein RA65LH 65,000 BTU RV Tankless Water Heater Check Latest Price
Steady temp: Furrion FWH09AFA-AM 60,000 BTU RV Tankless Water Heater Check Latest Price
High altitude: FOGATTI InstaShower 8 Plus RV Tankless Water Heater Check Latest Price
Endless hot water makes the road feel like home.
Looking for something else? Browse all of our Water Heaters guides and the wider Heating & Cooling section.
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