10 Best Propane Gas Heaters 2026 in the United States

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.

The ProCom ML300TBA-B is a compact propane gas heater that produces 28,000 BTUs, making it strong enough to heat spaces up to 1,400 square feet, which is suitable for most bedrooms, offices, and living rooms. Its blue flame technology helps provide efficient radiant heat, and the built-in thermostat lets you choose between high, medium, or low heat settings for comfort control. One of its best safety features is the oxygen depletion sensor (ODS) that automatically shuts off the heater if oxygen levels drop, helping prevent carbon monoxide buildup – a crucial feature for indoor propane heaters. The push-button ignition is convenient and doesn’t require electricity, making it handy during power outages or emergencies.

This heater is designed to be versatile in placement: it can be mounted on a wall or set on the floor using the included base feet, although it weighs around 29 pounds, so it’s not the lightest option if you plan to move it frequently. The sleek, white design with a slim profile fits in modern spaces without taking up much room. It’s important to note that this heater is meant strictly for indoor use and isn’t suitable for outdoor heating.

The ProCom unit combines strong heating power with dependable safety features and flexible installation options, making it a solid choice for someone needing efficient propane heating in medium-sized indoor areas. It might be less ideal if you want something ultra-portable or for larger spaces beyond 1,400 sq. ft.