10 Best Propane Gas Heaters 2026 in the United States

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.

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 EX08DTP is an indoor propane gas heater designed primarily for wall mounting, offering a solid 8,000 BTU output that can comfortably heat spaces up to about 1,600 square feet, making it suitable for bedrooms, home offices, or study rooms. This heater stands out for its energy efficiency and quiet operation, thanks to advanced modulating technology that adjusts heat output based on room temperature, helping you save on fuel while maintaining comfort. It uses an electronic spark ignition, which is reliable and convenient, eliminating the need for batteries or manual lighting.

Safety is well-considered with features like a cool-to-touch cabinet, child lock, and self-diagnostic electronics that monitor its operation and automatically shut down if problems arise, adding peace of mind for indoor use. Although it weighs 53 pounds and is fairly sizable (about 27 inches tall), it’s designed to be wall-mounted, so portability isn't a primary focus; this is more of a fixed heating solution than a portable one. The fuel consumption is efficient due to the 7-stage gas valve and variable speed inducer motor, which modulate the flame rather than running at full blast constantly.

This heater requires professional installation, so it’s not a simple plug-and-play device, especially if you’re not comfortable handling gas appliances. The temperature can be set between 60 and 80 degrees Fahrenheit, which suits typical indoor comfort levels but may feel limited if you want more flexibility. This Rinnai heater is ideal if you want a reliable, energy-saving propane heater for a specific indoor area and don’t mind arranging professional setup. It is less suitable if you need something portable or want to move your heater frequently.