10 Best Propane Heaters For Indoor Use 2025 in the United States

The Mr. Heater Portable Buddy Heater MH9BX is a versatile propane heater that delivers between 4,000 and 9,000 BTUs, making it suitable for spaces up to 225 square feet. This heater excels in several areas including its powerful radiant heat output and the advanced safety features it incorporates, such as a reliable tip-over safety switch and a low-oxygen shut-off system, which enhance safety in indoor settings.

The Piezo igniter ensures quick and hassle-free ignition without the need for external matches or lighters, adding to its user-friendly design. Its portability is another strong point, with a lightweight build and fold-down handle that make it easy to move around. Moreover, this heater offers flexible fuel options, connecting easily to a 1 lb. cylinder or adapting to a 20 lb. tank with an optional hose and filter.

Users will appreciate its fuel efficiency, providing up to 6 hours of heat on the low setting and 3 hours on high, ensuring prolonged warmth without frequent refills. However, one potential drawback is the absence of a built-in thermostat control, which means users need to manually adjust the heat settings. Additionally, while it is marketed as indoor-safe, adequate ventilation is still essential to prevent the build-up of carbon monoxide. This heater is best suited for small indoor spaces like bedrooms, home offices, and garages, as well as outdoor areas such as patios and job sites. Its combination of safety, portability, and efficiency makes it a reliable choice for those in need of a flexible heating solution.

The Mr. Heater F215100 MH4B Little Buddy is a compact propane heater that offers 3800 BTUs, making it suitable for heating small spaces up to 95 square feet, such as tents, campers, or small rooms. Its standout feature is its safety; it includes an automatic low oxygen shut-off system and a tip-over switch that will cut off the heater if it falls over, ensuring safe indoor use. It's designed with portability in mind, weighing just 1 pound and requiring no assembly, which makes it easy to transport and set up wherever needed.

This heater uses a simple on/off button for ignition and operates on a 1-pound disposable propane cylinder (not included), providing up to 5.6 hours of heat on a single cylinder. However, it lacks a thermostat control, so you can't set a specific temperature, and it requires a minimum ventilation area of 4 square inches to operate safely, which might be limiting for some users. It also cannot be used in moving vehicles or with unauthorized accessories, which may restrict its applications.

This heater is ideal for those in need of emergency heat or for use in small, enclosed outdoor spaces like tents, porches, and sheds. It receives strong customer reviews, reflecting its reliability and effectiveness.

The Mr Heater 4000 to 18000 BTU Portable LP Gas Heater is a versatile option for heating indoor spaces, with a focus on portability and adjustable heating levels. It can produce 4,000, 9,000, or 18,000 BTUs per hour, making it suitable for areas up to 450 square feet, which is great for small rooms or even outdoor settings like porches and picnics. This flexibility allows users to customize warmth based on their needs.

Safety features are a strong point with this heater. It includes an automatic shutoff mechanism that activates if the unit tips over, which is crucial for indoor use. Additionally, it has a low-oxygen safety shutoff feature, ensuring that adequate ventilation is maintained, which is important for preventing dangerous situations with propane heaters.

Portability is another highlight, as it weighs only 15 pounds and is easy to move around. This makes it a good choice for users who need a heater that can be relocated easily between different areas. However, it is essential to note that while it can connect to larger propane tanks for extended use, these accessories are not included, which may lead to extra costs. Users need to ensure proper ventilation when using this heater indoors, as it relies on combustion, and failure to do so may lead to safety concerns. Additionally, the lack of built-in features like a thermostat can be a downside for those looking for more precise temperature control.