Upgrading to a tankless water heater for your RV can transform your camping experience by providing endless hot water without the wait times or space requirements of traditional tank models. These innovative systems heat water on demand, conserving propane and eliminating the frustration of cold showers when the tank runs empty. Modern RV tankless water heaters offer impressive BTU outputs, altitude compensation features, and sophisticated temperature control systems designed specifically for mobile living.
We’ve analyzed the top performers in this category to help you find the perfect solution for your recreational vehicle. Our selections balance power output, installation compatibility, safety features, and overall performance to ensure you’ll enjoy reliable hot water wherever your adventures take you.
| Brand | Model | BTU Rating | Max GPM | High Altitude |
|---|---|---|---|---|
| FOGATTI | InstaShower 8 Plus | 55,000 | 2.9 | Yes (9,800 ft) |
| Suburban | ST-60 | 60,000 | Not specified | Not specified |
| Ranein | 65,000 BTU Model | 65,000 | 3.9 | Yes |
| GIRARD | 2022107534 | 42,000 | Not specified | Not specified |
| FOGATTI | InstaShower 7 | 48,000 | 2.5 | Yes (9,800 ft) |
#1 FOGATTI InstaShower 8 Plus RV Tankless Water Heater
The FOGATTI InstaShower 8 Plus represents a significant advancement in RV water heating technology, particularly for travelers who explore varied elevations. With its dedicated high altitude suitability mode, this unit performs exceptionally well at elevations up to 9,800 feet, making it ideal for mountain adventures where other heaters might struggle with reduced oxygen levels.
Installation versatility is a standout feature of the InstaShower 8 Plus. The unit fits a standard 13 x 13-inch opening and comes with a 15 x 15-inch door, allowing it to replace virtually any existing RV water heater including Suburban and Atwood tank models as well as Girard and Furrion tankless units. This compatibility makes it an excellent upgrade option regardless of your RV’s current setup.
Performance-wise, the 55,000 BTU heating capacity delivers up to 2.9 gallons per minute of hot water, dramatically outperforming traditional tank heaters. While tank models typically exhaust their 6-10 gallon capacity within 5-8 minutes, the FOGATTI provides continuous hot water for over 40 minutes of shower time. The staged combustion technology intelligently adjusts flame intensity based on seasonal conditions, preventing water from becoming excessively hot in summer months while conserving propane.
The included remote controller adds convenience, allowing temperature adjustments without accessing the exterior panel. For RVers seeking a reliable, powerful solution that works across varying altitudes and climates, the InstaShower 8 Plus delivers exceptional value with its blend of performance, efficiency, and universal compatibility.
#2 Suburban ST-60 RV Tankless Water Heater (60,000 BTU)
Coming from one of the most respected names in RV appliances, the Suburban ST-60 tankless water heater prioritizes safety without sacrificing performance. With a powerful 60,000 BTU output, this unit delivers consistent hot water for all your RV needs while incorporating multiple layers of protection for peace of mind.
The advanced flame out protection system stands as a critical safety feature, automatically cutting gas supply if low propane pressure or burner issues are detected. This responsive safeguard prevents potential hazards, particularly important in the confined space of an RV. Additionally, the internal high-temperature kill switch provides reliable scald protection by maintaining maximum water temperatures of 131°F, protecting users from thermostat malfunctions.
Families with children will appreciate the thoughtful child lock feature that prevents outlet temperatures from exceeding 113°F, eliminating the risk of accidental scalding. This comprehensive approach to safety makes the Suburban ST-60 an excellent choice for RVers who prioritize protection alongside performance.
The digital user control center offers intuitive operation, allowing precise temperature adjustments and system monitoring. The unit also features freeze protection technology, safeguarding the system during cold weather camping or during storage in freezing conditions. This protection extends the lifespan of your investment while preventing costly freeze damage repairs.
While Suburban doesn’t specify the exact gallons per minute output, the substantial 60,000 BTU rating ensures ample hot water production for typical RV uses including consecutive showers, dishwashing, and other needs. The established reputation of Suburban in the RV industry provides additional confidence in the reliability and durability of this tankless system.
#3 Ranein 65,000 BTU RV Tankless Water Heater
The Ranein tankless water heater delivers impressive power with its 65,000 BTU output capacity, making it one of the highest-performing options in the RV market. This substantial heating capability translates to a maximum flow rate of 3.9 gallons per minute, providing abundant hot water for multiple consecutive showers or simultaneous uses throughout your RV.
A standout feature is the upgraded multi-function remote control that offers comprehensive system monitoring. Users can track gas usage, voltage, water flow rate (GPM), anti-freeze activation status, and utilize the high altitude mode when necessary. This detailed information helps optimize performance and troubleshoot any potential issues quickly.
Installation flexibility is excellent with the Ranein model fitting 12.8 x 12.8-inch openings. The unit can replace Suburban and Atwood tank water heaters of various capacities (6/10/12 gallon) with appropriate doors. While the door requires separate purchase, three size options (15 x 15, 15 x 18, or 18 x 18 inches) accommodate virtually any existing cutout dimension in your RV.
The deep fire row design enhances heating efficiency, maximizing heat transfer to the water while minimizing propane consumption. Unlike traditional tank heaters that require waiting for water to heat, the Ranein provides instant hot water on demand as long as sufficient gas and water pressure are available. This instant heating capability eliminates the waiting period typically associated with tank systems, allowing for more spontaneous use.
For RVers who place a premium on powerful performance, comprehensive monitoring capabilities, and installation adaptability, the Ranein 65,000 BTU model represents an excellent investment in comfort and convenience on the road.
#4 GIRARD 2022107534 Tankless RV Water Heater
The GIRARD 2022107534 stands out for its exceptional efficiency and remarkably quiet operation. While its 42,000 BTU rating is lower than some competitors, GIRARD has optimized this system to deliver impressive performance while consuming approximately half the propane of traditional 6-gallon tank heaters for the same hot water output. This efficiency makes it an excellent choice for extended boondocking or dry camping where conserving resources is critical.
Noise levels are dramatically reduced thanks to the brushless motor technology that operates on 12V power at less than three amps. This near-silent operation enhances the camping experience by eliminating the disruptive noise often associated with water heater operation, particularly valuable for smaller RVs where mechanical sounds are more noticeable.
The sophisticated onboard microprocessor sets this unit apart by continuously monitoring three crucial factors: incoming water temperature, flow rate, and outgoing water temperature. This comprehensive approach allows the system to maintain consistent temperature by precisely regulating the burner. The result is a steady, comfortable flow without the temperature fluctuations (cold spots or scalding surges) that plague less advanced systems.
Installation is straightforward with the compact design fitting standard RV water heater compartments. The digital user control panel provides intuitive temperature adjustment and system monitoring, giving users complete control over their hot water experience.
While the BTU rating is lower than some alternatives, the GIRARD compensates with superior efficiency and temperature consistency. For RVers who prioritize quiet operation, propane conservation, and reliable performance, the GIRARD 2022107534 delivers exceptional value despite its more modest power rating.
#5 FOGATTI InstaShower 7 RV Tankless Water Heater
The FOGATTI InstaShower 7 offers an excellent balance of performance and adaptability for the average RV family. With a 48,000 BTU heat output generating 2.5 gallons of hot water per minute, it delivers sufficient capacity for typical RV usage patterns without excessive power that might go unused. This right-sized approach ensures efficient operation for families on the road.
Installation versatility is a key strength, with three door size options (15 x 15, 15 x 18, or 18 x 18 inches) available in both black and white finishes. This flexibility allows the unit to easily replace virtually any existing RV water heater, whether tank or tankless. The doors are sold separately, allowing you to select the precise size needed for your specific RV configuration.
Like its higher-powered sibling (the InstaShower 8 Plus), this model features the valuable high-altitude suitability mode that ensures reliable operation at elevations up to 9,800 feet. This capability is particularly valuable for mountain travelers and those who explore varied terrain, as many standard heaters struggle with combustion at higher elevations where oxygen levels are reduced.
The staged combustion technology maintains consistent water temperatures by intelligently modulating flame output based on incoming water temperature and ambient conditions. This prevents the temperature fluctuations common in less sophisticated systems while maximizing propane efficiency. The result is a reliable flow of hot water at your preferred temperature without wasteful overheating.
For RVers seeking a balance of performance, installation flexibility, and high-altitude capability at a more moderate price point than premium models, the InstaShower 7 represents an excellent value proposition with its thoughtful design and reliable operation.
RV Tankless Water Heater Buying Guide
BTU Rating and Water Flow Capacity
The British Thermal Unit (BTU) rating directly impacts how much hot water your heater can produce. For most RVs, models between 40,000-65,000 BTUs provide sufficient heating capacity. Higher BTU ratings generally correlate with higher gallons per minute (GPM) output, typically ranging from 2.5-3.9 GPM for RV units. Consider your typical usage patterns when selecting BTU capacity – a larger family or those who take longer showers may benefit from higher-rated models, while couples or solo travelers might find more moderate BTUs sufficient.
Installation Compatibility
Before purchasing, measure your existing water heater compartment dimensions carefully. Most RV tankless heaters are designed to replace standard 6-10 gallon tank heaters from brands like Suburban and Atwood. Pay particular attention to the cutout dimensions (typically 12-13 inches square) and door size (commonly 15 x 15 inches). Some manufacturers offer multiple door size options to accommodate various RV configurations, but these doors are often sold separately. Check whether your preferred model includes a door or if you’ll need to purchase one separately.
Power Requirements
Most RV tankless water heaters use propane for heating while requiring 12V DC power for electronic ignition, fans, and control systems. Verify your RV’s electrical capacity can support the unit’s requirements, typically 1-3 amps. Some models feature more energy-efficient components like brushless motors that consume less electricity, an important consideration for boondocking or dry camping where power conservation is critical.
High Altitude Performance
If your travels include mountainous regions, high altitude capability is crucial. Standard combustion systems often struggle above 5,000 feet due to reduced oxygen levels, leading to inefficient heating or system shutdowns. Many premium models now include specific high-altitude modes that adjust combustion parameters to maintain performance at elevations up to 10,000 feet. This feature ensures consistent hot water regardless of your camping elevation.
Temperature Control and Safety Features
Advanced temperature management is essential for comfortable and safe use. Look for models with digital temperature controls that allow precise adjustment, typically between 95-125°F. Safety features should include flame failure protection that automatically cuts gas if the flame extinguishes, anti-scalding systems that prevent excessive temperatures, and freeze protection for cold weather camping. Child lock features provide additional safety by limiting maximum temperature output.
Seasonal Performance Adaptability
Quality tankless heaters include adaptive heating technology that adjusts to seasonal conditions. Staged combustion systems modulate flame intensity based on incoming water temperature, preventing overheating in summer while ensuring sufficient warming in winter. This intelligent adaptation maximizes comfort while conserving propane across varied conditions.
Propane Efficiency
Tankless water heaters are inherently more efficient than tank models since they only heat water on demand rather than maintaining a reservoir of hot water. However, efficiency varies between models. More efficient units can reduce propane consumption by 20-50% compared to traditional tank heaters. Look for models that highlight propane efficiency in their specifications, particularly if you frequently camp without hookups where propane conservation matters.
Noise Level
Operating noise can significantly impact comfort, especially in smaller RVs. Brushless motors and insulated components reduce operational noise. Some manufacturers specifically highlight quiet operation in their features. If sound sensitivity is a concern, prioritize models that emphasize noise reduction technology.
Warranty and Support
RV tankless water heaters represent a significant investment, making warranty coverage and manufacturer support important considerations. Standard warranties typically range from 1-2 years, with some premium brands offering extended coverage. Beyond warranty length, investigate the reputation of the manufacturer for honoring claims and providing parts and service. Domestic support with readily available replacement parts can significantly reduce downtime if issues arise.
Remote Control and Monitoring
Advanced models include remote controls or digital interfaces that allow precise temperature adjustment and system monitoring without accessing the exterior compartment. Comprehensive monitoring systems display operational data like water flow rate, propane consumption, and voltage levels, helping optimize performance and diagnose potential issues. These convenience features enhance the user experience while providing valuable system insights.
Winter Protection Features
For four-season RVers or those who store their vehicles in cold climates, freeze protection capabilities are essential. Look for models with automatic freeze protection that activates at temperatures approaching freezing to prevent damage to internal components. Some units include drain valves or specific winterization procedures for long-term storage in freezing conditions.
