10 Best Propane Gas Heaters 2025 in the United States

The Ranein Propane Gas Tankless Water Heater is a powerful unit with a 100,000 BTU rating and can deliver up to 4.3 gallons of hot water per minute. This makes it suitable for supplying hot water to multiple points like a bathroom, kitchen, and bar without running out. Its tankless design means you get instant hot water without waiting, which is convenient for busy households. It also includes smart features like automatic temperature adjustment for different seasons and preset modes for kitchen and bathtub uses, enhancing comfort and ease of use.

Safety-wise, the product includes a vent pipe for proper exhaust, which is important for indoor use. Installation should be done by professionals to meet local codes, and it’s not recommended for high-altitude areas over 2,000 feet. Portability is average since it weighs 28 pounds and is designed more as a semi-permanent indoor fixture rather than a portable heater.

The heater uses propane efficiently with a copper water tank that helps reduce heat loss and energy consumption. It runs on standard 120V power for controls but does not need electric batteries. This model is best suited for homeowners looking for a reliable, on-demand hot water solution that avoids the energy waste of tank heaters and meets the needs of multiple water outlets. For those needing a heater for larger spaces, outdoor use, or a fully portable option, this might not be the best fit.

The Rinnai RE140iP is a propane tankless water heater designed for indoor use that offers strong heating power with its 140,000 BTU rating, capable of delivering up to 5.3 gallons of hot water per minute. This means it can handle multiple water fixtures at once, making it a good fit for households needing a steady, on-demand hot water supply without running out. Its compact size is a plus, roughly the size of a small suitcase, which helps with installation in tighter spaces. The unit features an LED display for easy monitoring, including service reminders and error codes that can aid in maintenance and troubleshooting. While it is designed for indoor installation, it requires professional installation to ensure safety and proper operation.

The heater is not portable due to its size and installation needs, and it uses propane gas directly rather than electricity, which can be efficient but requires a reliable propane supply. This model suits homeowners who want a reliable, high-output hot water system and are comfortable arranging professional installation. It is less suitable for those needing a portable or outdoor heater or those unfamiliar with propane systems.

The Rinnai RE160eP is a propane-powered tankless water heater designed for outdoor use, delivering a strong 160,000 BTU output and capable of providing hot water to multiple fixtures simultaneously with a flow rate of up to 6.6 gallons per minute. This makes it a good fit for medium to larger households needing continuous hot water without the bulk of a traditional tank heater.

It features a smart design that heats water only when needed, helping to conserve energy, and includes an easy-to-read LED display that shows service reminders and error codes, enhancing user convenience and maintenance. The unit is fairly compact, about the size of a small suitcase, making it reasonably portable among tankless models, though it is wall-mounted and weighs around 49 pounds, so it’s not something you'd move frequently.

Safety-wise, it is built for outdoor installation, which reduces concerns about indoor gas fumes, but it does require professional installation for safe operation, indicating it’s not a simple DIY project. Fuel consumption is optimized through its non-condensing technology that focuses on heating only when necessary, which can save propane over time compared to older models. The product comes with a solid warranty on key components, reinforcing its durability and reliability. The Rinnai RE160eP is well-suited for users looking for an energy-efficient, high-capacity outdoor propane water heater, with the caveat that installation should be left to professionals and portability is limited by its size and wall-mount design.