10 Best Portable Propane Heaters 2025 in the United States

The Mr. Heater Big Buddy Pro Series is a portable propane heater that delivers between 4,000 and 18,000 BTUs, making it powerful enough to warm up spaces up to about 450 square feet. This range of heat settings (low, medium, and high) allows you to adjust the warmth to your comfort level, which is handy whether you're in a small garage or a larger room. It runs on propane and connects to a tank (not included), so you'll want to consider fuel availability and consumption depending on how long you plan to use it.

One of the biggest advantages of this heater is its versatility—it’s approved for both indoor and outdoor use, which means you can use it in your home, office, patio, or garage. It’s designed to be clean-burning and almost 100% efficient, which helps reduce wasted fuel and keeps the air cleaner. On safety, it includes several important features: it automatically shuts off if tipped over, if the pilot light goes out, or if it detects low oxygen, which adds peace of mind when using it indoors.

Portability is good for this model; it weighs about 11 pounds and has a pedestal design that’s easy to place where you need it. However, it requires 4 D batteries for ignition, so you’ll need to keep those handy. Note that at high altitudes (above 7,000 feet), the heater may shut off, which could be a limitation if you live in mountainous areas. Some models no longer include a fan due to import tariff changes, which means the heat distribution might be less even compared to fan-equipped models. Also, using unauthorized accessories can void the warranty and be unsafe, so it’s important to stick to official parts. Since it uses propane tanks, fuel consumption will depend on tank size and heat settings, so running times can vary.

This heater is a reliable, portable heat source with good safety features for both indoor and outdoor use. It is especially useful for people who want flexible heat settings and easy setup, but it is important to keep in mind the possible performance limits at high altitudes and the absence of a fan in some models.

The Mr. Heater MH9BX is a portable propane heater designed for outdoor use with a BTU rating ranging from 4,000 to 9,000, making it suitable for heating spaces up to 225 square feet. This rating is ideal for small to medium-sized areas, such as campsites or patios. It is highly portable, weighing only 9.5 pounds and featuring a fold-down handle, making it easy to transport and set up wherever needed.

One of its standout features is the array of safety measures, including auto shut-off if tipped over, if the pilot light goes out, or if low oxygen levels are detected. This makes it a safer choice for outdoor heating. However, it is important to note that the heater may shut off at high altitudes, over 7,000 feet, which could be a concern for those planning to use it in mountainous regions.

In terms of efficiency, the MH9BX is nearly 100-percent efficient and clean-burning, which is a significant advantage for environmentally conscious users. The heater connects to a propane tank, though it is not included, and offers a run time of about 5.6 hours on the minimum BTU setting. This provides decent fuel consumption for prolonged use. The ignition type is manual, which might require a bit of effort but is generally reliable. It is important to follow the guidelines and avoid unauthorized accessories to prevent voiding the warranty and potential safety risks.

With a high customer rating of 4.6 out of 5 stars, it is well-regarded by users, especially in the context of RV and outdoor use. While it may require assembly and some users might find the manual ignition less convenient than automatic options, its portability, safety features, and efficient heating capability make it a strong contender for anyone in need of a reliable outdoor heater.

The Mr. Heater MH540T is a strong choice for anyone needing a reliable portable propane heater for outdoor activities like camping, hunting, or tailgating. It offers three adjustable heat levels (30,000 to 45,000 BTUs), letting you control the warmth depending on your needs. Its 540° radiant coverage with a swivel bracket ensures heat spreads broadly, warming both people and nearby objects effectively within about 100 square feet. This makes it well-suited for small to medium outdoor spaces.

Weighing just 5.5 pounds and featuring a tank-top design, it’s highly portable and easy to set up on a propane tank without extra assembly. Starting the heater is simple thanks to its push-button ignition, with a manual match-lit option as backup. Safety is well covered with a tip-over shut-off that automatically turns the heater off if it falls, helping prevent accidents.

The heater is designed strictly for outdoor use due to its flame-based radiant heating and propane fuel, so it’s not suitable for indoor spaces. The adjustable heat settings offer some control over propane consumption, and the secure leak-free connection adds peace of mind during use. The MH540T provides powerful, adjustable heat with solid safety features and easy operation, making it a practical and dependable option for outdoor events or spaces without electricity.