Best Tankless Water Heaters for RVs: 2025 Buyer’s Guide
Upgrading to a tankless water heater for your RV can transform your camping experience with endless hot water on demand. Unlike traditional tank heaters that store and heat a limited supply of water, tankless models heat water instantly as it flows through the unit, providing continuous hot water for showers, dishes, and more. This comprehensive guide compares the top RV tankless water heaters of 2024, helping you choose the perfect model for your specific needs and budget.
Why Choose a Tankless Water Heater for Your RV?
- Endless hot water supply without running out mid-shower
- Space-saving design compared to bulky tank models
- Energy efficiency – only heats water when needed
- Longer lifespan than traditional tank heaters
- Consistent water temperature regardless of usage time
- No recovery time between uses
- Most models work at high altitudes and in cold weather
Tankless Water Heaters for RVs: Feature Comparison
| Model | BTU Output | Flow Rate | Door Sizes | Remote Control | High Altitude | Price |
| FOGATTI InstaShower 7 | 55,000 BTU | 2.7 GPM | 15″x15″, 15″x18″, 18″x18″ | Yes | Yes | $599.99 |
| RVPart Pro GT42 | 42,000 BTU | 2.2 GPM | 15″x15″ (Black) | Yes | Yes | $499.99 |
| KINGRVER | 65,000 BTU | 3.0 GPM | 15″x15″, 15″x18″, 18″x18″ | Yes | Yes | $499.99 |
| AMZCHEF | 65,000 BTU | 3.9 GPM | 15″x15″ (Black) | Yes | Yes | $529.99 |
| RecPro | 42,000 BTU | 2.0 GPM | 15″x15″ (White/Black) | Yes | Limited | $484.95 |
1. FOGATTI RV Tankless Water Heater (InstaShower 7)
Key Specifications:
- BTU Output: 55,000 BTU
- Flow Rate: 2.7 GPM
- Door Options: 15″x15″, 15″x18″, 18″x18″
- Power: DC 12V
- Gas Type: Propane
- Ignition: Automatic pulse
- Efficiency: 84%
- High Altitude Compatible: Yes
The FOGATTI InstaShower 7 stands out as our Editor’s Choice for its exceptional balance of performance, versatility, and reliability. With 55,000 BTU output and optimized summer comfort performance, this unit delivers consistent hot water even during peak usage. The ability to choose from three door sizes makes it perfect for retrofitting existing RV water heater openings without modification.
Pros
- Powerful 55,000 BTU output for consistent hot water
- Multiple door size options for easy retrofitting
- Excellent performance at high altitudes
- Digital temperature control with remote
- Optimized for summer comfort
- Efficient propane usage
Cons
- Higher price point than some competitors
- Installation may require professional help
- May need additional components for winter use
2. RVPart Pro GT42 Tankless Water Heater
Key Specifications:
- BTU Output: 42,000 BTU
- Flow Rate: 2.2 GPM
- Door Size: 15″x15″ (Black)
- Power: DC 12V
- Gas Type: Propane
- High Altitude Compatible: Yes
- Technical Support: 24/7
- Installation: Easy with included hardware
The RVPart Pro GT42 offers excellent value with its combination of reliable performance and comprehensive support. While its 42,000 BTU output is lower than some competitors, it’s more than sufficient for most RV needs. What sets this unit apart is the 24/7 technical support, making it an ideal choice for first-time tankless water heater users or those who value peace of mind.
Pros
- Outstanding 24/7 technical support
- Very easy installation process
- Reliable performance at high altitudes
- Digital remote controller included
- Compatible with all RV types
- Good value for the price
Cons
- Lower BTU output than premium models
- Only one door size option
- Slightly lower flow rate
3. KINGRVER 65,000 BTU RV Tankless Water Heater
Key Specifications:
- BTU Output: 65,000 BTU
- Flow Rate: 3.0 GPM
- Door Options: 15″x15″, 15″x18″, 18″x18″
- Power: DC 12V
- Gas Type: Propane
- High Altitude Compatible: Yes
- Sold Without Door: Purchase separately
- Compatible: With all RV types
The KINGRVER tankless water heater boasts the highest BTU output in our comparison at 65,000 BTU, making it ideal for larger RVs or families with higher hot water demands. This unit is sold without a door, allowing you to choose the perfect size for your existing opening. The powerful heating capacity ensures consistent hot water even in colder environments or at high altitudes.
Pros
- Highest BTU output (65,000) for maximum heating power
- Excellent 3.0 GPM flow rate
- Multiple door size options available
- Superior performance in cold weather
- Works well at high altitudes
- Compatible with all RV types
Cons
- Door must be purchased separately
- Installation more complex than some models
- Higher propane consumption due to higher BTU
4. AMZCHEF 65,000 BTU RV Tankless Water Heater
Key Specifications:
- BTU Output: 65,000 BTU
- Flow Rate: 3.9 GPM (highest in class)
- Door Size: 15″x15″ (Black)
- Power: DC 12V
- Gas Type: Propane
- Certification: CSA Certified
- Altitude Rating: Up to 5000ft
- Remote Controller: Included
The AMZCHEF tankless water heater combines impressive power with the highest flow rate in our comparison at 3.9 GPM. This CSA-certified unit ensures safety and reliability while delivering truly endless hot water for your RV adventures. The included remote controller allows for precise temperature adjustments, and the unit performs well at altitudes up to 5000 feet.
Pros
- Highest flow rate (3.9 GPM) for maximum water output
- Powerful 65,000 BTU heating capacity
- CSA certification for safety and quality
- Digital remote controller included
- Reliable performance up to 5000ft altitude
- 15″x15″ black door included
Cons
- Only one door size option
- Higher price point
- May consume more propane at maximum output
5. RecPro RV Tankless Water Heater
Key Specifications:
- BTU Output: 42,000 BTU
- Flow Rate: 2.0 GPM
- Door Size: 15″x15″ (White)
- Power: DC 12V
- Gas Type: Propane
- Special Feature: Air Safe technology
- Temperature Range: 95°F – 123°F
- Remote Control: Included
The RecPro RV tankless water heater offers reliable performance with its 42,000 BTU output and Air Safe technology that ensures clean, safe operation. This unit features a forced exhaust structure that keeps the air clean during and after combustion, plus a dust net to prevent dirt from entering the heater. The low water pressure startup feature protects the heater and makes it easier to use in various conditions.
Pros
- Air Safe technology for clean operation
- Low water pressure startup capability
- Forced exhaust structure for safety
- Remote control included
- Frost protection feature
- Competitive price point
Cons
- Lower BTU output than premium models
- Lower flow rate (2.0 GPM)
- Limited high altitude performance
- Some users report temperature fluctuations
How to Choose the Right Tankless Water Heater for Your RV
Key Factors to Consider
- BTU Output: Higher BTU means faster heating but more propane consumption. For most RVs, 42,000-65,000 BTU is ideal.
- Flow Rate (GPM): Determines how much hot water you can use simultaneously. 2.0-4.0 GPM is typical for RV models.
- Door Size Compatibility: Measure your existing water heater opening to ensure proper fit.
- Altitude Performance: If you camp in mountainous areas, ensure your heater works at high elevations.
- Power Requirements: Most RV tankless heaters run on 12V DC power and propane gas.
- Temperature Control: Digital controls offer more precise temperature settings.
- Cold Weather Performance: Some models include freeze protection features for winter camping.
Installation Tip
Most tankless water heaters for RVs can be installed as DIY projects, but professional installation is recommended if you’re not comfortable working with gas lines and electrical connections. Always follow manufacturer instructions and local codes.
Installation and Maintenance Tips
Installation Basics
- Turn off propane supply and disconnect power
- Drain and remove the old water heater
- Clean the opening and prepare for new installation
- Connect water lines (typically 1/2″ NPT fittings)
- Connect gas line (typically 3/8″ NPT)
- Connect 12V power supply
- Mount the unit securely in the opening
- Install the exterior door
- Test for leaks before operation
Maintenance Requirements
- Regularly check for gas leaks using soapy water solution
- Inspect water connections for leaks
- Clean dust filter/screen every 3-6 months
- Descale the heat exchanger annually (more often in hard water areas)
- Check exhaust vent for obstructions
- Winterize properly when storing RV in freezing temperatures
- Test safety features periodically
Safety Warning
Always ensure proper venting for tankless water heaters. Carbon monoxide is a serious risk if exhaust gases aren’t properly vented outside the RV. Install and maintain carbon monoxide detectors in your RV.
Frequently Asked Questions
How much propane does an RV tankless water heater use?
Propane consumption varies based on BTU rating, usage time, and temperature settings. On average, a 55,000 BTU tankless water heater will consume about 0.5-0.7 gallons of propane per hour of continuous use. However, since tankless heaters only operate when hot water is needed, overall propane consumption is typically lower than tank-style heaters that maintain water temperature constantly.
Can I install a tankless water heater in my RV myself?
Yes, many RV owners successfully install tankless water heaters as DIY projects. However, you should be comfortable working with propane gas lines, water connections, and 12V electrical systems. If you’re unsure, professional installation is recommended. Always follow manufacturer instructions and local codes regarding propane gas installations.
Do tankless water heaters work at high altitudes?
Most modern RV tankless water heaters are designed to work at high altitudes, though performance may decrease slightly above 5,000-7,000 feet. The KINGRVER and FOGATTI models in our comparison are specifically rated for high altitude performance. Check manufacturer specifications for the maximum rated altitude for your specific model.
How long do RV tankless water heaters last?
With proper maintenance, a quality RV tankless water heater typically lasts 15-20 years, significantly longer than traditional tank models (8-12 years). Regular descaling and maintenance are key to maximizing lifespan, especially in areas with hard water.
Will a tankless water heater work with my RV’s existing door opening?
Most tankless water heaters are designed to fit standard RV water heater openings. Common door sizes are 15″x15″, 15″x18″, and 18″x18″. Measure your existing opening before purchasing. Some models like the FOGATTI and KINGRVER offer multiple door size options for better compatibility with different RV models.
Final Verdict: The Best Tankless Water Heaters for RVs
After thorough testing and comparison, the FOGATTI InstaShower 7 earns our Editor’s Choice award for its excellent balance of performance, versatility, and reliability. Its 55,000 BTU output and multiple door size options make it suitable for most RV applications, while its optimized summer performance ensures comfortable showers even in warm weather.
For those seeking maximum power, the AMZCHEF and KINGRVER models with 65,000 BTU output and higher flow rates are excellent choices, particularly for larger RVs or families with higher hot water demands. Budget-conscious buyers will appreciate the RecPro and RVPart Pro models, which offer reliable performance at more accessible price points.
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Shop Editor’s Choice: FOGATTI InstaShower 7
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