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 30,000 BTU Vent Free Radiant Propane Heater stands out in the indoor heating category, especially for spaces like cold rooms, sunrooms, and cabins. With a robust output of 30,000 BTUs, it efficiently warms areas up to approximately 1,000 sq. ft., making it suitable for larger spaces. Its advanced infrared technology is a highlight, delivering warmth directly to objects and people instead of just heating the air, which can feel more comfortable in chilly conditions.

Safety is a significant consideration, and this heater features an automatic low-oxygen shut-off system. This is crucial for indoor use, as it ensures the heater will turn off if oxygen levels fall too low, providing peace of mind while using it. Additionally, the convenience of a built-in thermostat allows for easy temperature adjustments, and the battery-powered ignition simplifies starting the unit.

There are a few aspects to consider. While it's designed for larger areas, the actual effective heating coverage is about 750 sq. ft., which may limit its effectiveness in very spacious settings. Portability is another point; weighing in at 30.1 pounds, it’s not overly heavy, yet wall mounting is required, which could be a drawback for those looking for flexibility in placement. Being a vent-free model means that it does not require a flue or chimney, which can be advantageous for installation but may also raise concerns regarding indoor air quality over prolonged use. It’s essential to ensure that the room is well-ventilated when using this heater.

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.