When selecting a 5th wheel water heater, the goal is reliable on-demand hot water, energy efficiency, and easy installation for RV setups. This guide highlights five propane-powered, on-demand options that cater to different RV lifestyles, from weekend travelers to full-time nomads. Each product is evaluated for suitability, elevation performance, and practical limitations to help you choose the right unit for your rig.
| Product | Best For | Key Benefit | Elevation Suitability |
|---|---|---|---|
| FOGATTI InstaShower 7 | Busy RV families and high-use sites | High heat output and 2.5 GPM | Up to 9,800 ft |
| APUS RV Tankless Water Heater (Black Door) | Compact installs and standard RV bays | Compact footprint with strong 3.9 GPM | Up to 9,800 ft |
| RV Tankless Water Heater 12V (Somokg) | Off-grid and mountain camping | 3.9 GPM, robust flame control | Up to 9,840 ft |
| APUS RV Tankless Water Heater (White Door) | Same high performance, different door finish | Same 3.9 GPM, compact fit | Up to 9,800 ft |
| VEVOR RV Tankless Water Heater | All-season usability and ease of control | 42,000 BTU with LED display | All-season operation |
FOGATTI InstaShower 7 RV Tankless Water Heater
The Fogatti InstaShower 7 delivers 2.5 gallons of hot water per minute with a 48,000 BTU heat output. Its tankless design heats on demand, reducing energy use by firing burners only when water flow is detected. It is compatible with three door sizes (15″x15″, 15″x18″, 18″x18″) and supports high-altitude operation with staged combustion technology to maintain consistent temperatures. Best for busy RV families that need rapid hot water and reliable performance in variable elevations. Caution: installation requires choosing the correct door size, which is sold separately.
APUS RV Tankless Water Heater, Black Door
APUS offers a compact, high-capacity option with an impressive 3.9 GPM flow, driven by a 68,000 BTU propane burner. Its 14.96″ x 14.96″ x 14.18″ footprint fits many standard RV compartments, and it supports 12V DC power for off-grid flexibility. Best for RV owners who want strong hot water availability without sacrificing living space. Choose this if you need a small unit that still delivers reliable performance. Limitation: installation must accommodate a specific cutout size and connect to propane/NPT fittings as listed.
RV Tankless Water Heater 12V, 65,000 BTU (Somokg)
This model features 3.9 GPM on-demand hot water with a robust 65,000 BTU propane system and a 15″x15″ lockable door for secure RV mounting. It includes anti-freeze and high-altitude capabilities, making it suitable for mountain travel and off-grid use. Best for travelers who need dependable showers and the option to remotely control settings. Caution: data notes a heavier build that should be considered for mount strength in some rigs.
APUS RV Tankless Water Heater, White Door
This APUS variant mirrors the Black Door model with the same 3.9 GPM output and 68,000 BTU propane burner. It offers a white door option for RVs that prefer a lighter interior aesthetic. Best for users who require the same performance as the Black Door but want a different exterior to match their setup. Limitation: identical specs may make it difficult to justify the price premium if both doors are available in your market.
VEVOR RV Tankless Water Heater
VEVOR combines 42,000 BTU with a white 15″ x 15″ door and a user-friendly LED display. It is designed to support all-season use through segmented combustion that adapts to temperature changes. Best for RVers seeking straightforward operation and energy efficiency in varied climates. Caution: lower BTU compared with other models means slower hot water recovery during peak demand.
Buying Guide
What should you consider when choosing a 5th wheel water heater?
- Output and flow: Look for GPM ratings around 3.5–4.0 GPM for comfortable showers and dishwashing. Higher BTU generally correlates with faster heating.
- Elevation performance: If you travel to high altitudes, ensure the unit supports high-altitude operation and has anti-freeze or freeze protection features.
- Door size and fit: Some heaters require specific door openings (e.g., 15”x15” or 15”x18”). Verify your RV compartment dimensions before purchase.
- Power and fuel: Most options use propane with 12V DC for ignition and control. Confirm compatibility with your RV’s wiring and propane system.
- Installation constraints: Check cabinet clearance, venting requirements, and willingness to perform panel or door modifications if needed.
- Reliability and maintenance: Tankless systems reduce standby heat and maintenance like anode rod replacement, but require periodic checks for gas and water connections.
FAQ
- What is the typical GPM for RV tankless water heaters? Answer: Most listed models provide around 3.9 GPM, suitable for showers and multiple tasks with steady output.
- Can these heaters operate at high elevations? Answer: Yes, several models advertise operation up to about 9,800–9,840 feet with altitude-specific settings.
- Do these require a large electrical draw? Answer: Most rely primarily on propane; electrical needs are typically for ignition and control, not full heating power.
- Are these units suitable for off-grid camping? Answer: Yes, several models are designed for off-grid use with stable ignition and efficient fuel use.
- Do all models fit standard RV door openings? Answer: No, fitment depends on door size; verify the required cutout and door dimensions for your RV.