10 Best Camping Water Heaters 2025 in the United States

The Rinnai RX160iN tankless water heater is a versatile option for camping or outdoor use, as it can run on natural gas or propane, giving you flexibility depending on your fuel availability. Its flow rate of up to 9 gallons per minute means it can supply hot water to multiple fixtures simultaneously, which is quite powerful for camping or RV setups needing consistent hot water. The unit’s heating capacity is strong at 160,000 BTUs, and it can heat water up to 140°F, ensuring rapid warming even in cooler environments. While it’s compact—about the size of a small suitcase and weighing 54 pounds—it isn’t very lightweight for backpacking but is manageable for RV or campsite installations where portability is moderate.

The heater is designed for both indoor and outdoor use with a special Versa Vent system, which is handy for varied camping setups, though professional installation is recommended, so it may not be ideal for casual or DIY campers. The interface is user-friendly, with features like Quick Flush for easy maintenance and optional WiFi connectivity to monitor and control the unit remotely. Safety-wise, the Smart Sense gas control helps optimize fuel use and prevent unsafe conditions.

On the downside, the need for a vent cap for outdoor use and professional installation could add complexity and cost. Also, its size and weight make it less suitable for lightweight camping where compact gear is preferred. The Rinnai RX160iN is well-suited for campers who want reliable, on-demand hot water with flexibility in fuel choice and who do not mind a bit of setup effort. It performs best with RVs, cabins, or well-equipped campsites rather than ultra-light or minimalist camping.

The Rinnai RE199eN is a natural gas tankless water heater designed for outdoor use, making it a strong option if you need reliable hot water while camping or for other outdoor activities. It delivers a high heating capacity with 199,000 BTUs and can provide up to 9.8 gallons per minute, which means it can easily supply hot water to multiple faucets or showers at the same time. This makes it suitable for larger groups or setups where several people might need hot water simultaneously.

Since it runs on natural gas, it’s efficient for extended use but requires access to a gas supply, which might not suit all camping locations. The unit is fairly compact, about the size of a small suitcase and weighing around 53 pounds. This makes it portable enough to move or install outdoors but less ideal if you’re looking for a lightweight, backpack-friendly heater.

In terms of ease of use, the heater features an LED display that shows service reminders and error codes, helping with maintenance and troubleshooting. Installation is recommended to be done by a professional, so it’s not a simple plug-and-play device, which could be a downside if you want something ready to go without expert help. The unit includes standard built-in safety protections common in tankless water heaters, and its outdoor design helps prevent indoor gas or vapor buildup. It also conserves energy by only heating water when needed.

If you want steady, on-demand hot water outdoors and have access to natural gas and professional installation, the Rinnai RE199eN offers powerful heating and good flow rates. However, if your camping spot lacks gas or you prefer ultra-portable gear, a smaller propane or electric model might be more convenient.

The CAMPLUX Battery Powered Portable Water Heater, Nano 3 Pro, is designed for outdoor enthusiasts who value the comfort of hot showers while camping or hiking. Weighing just 13.7 lbs, this unit is lightweight and portable, making it easy to transport to various locations. One of its standout features is the instant heating capability, allowing users to enjoy warm showers within seconds. With a maximum water flow rate of 3 gallons per minute and a heating capacity of 20,500 BTUs, it provides an efficient solution for outdoor washing needs.

Portability is a significant strength here, as it includes two durable handles for easy carry. The device supports multiple charging options, such as a built-in 4,000 mAh battery, which can provide up to 100 minutes of use when fully charged. The fact that it can charge during operation adds to its convenience.

Safety features such as flame failure protection and low water flow protection are commendable, but users should still exercise caution, particularly in ensuring the unit is set up correctly to avoid mishaps. The maximum temperature of 122°F might not be sufficient for everyone, especially on colder days.