10 Best Space Heater For Garage 500 Square Feet 2025 in the United States

The Mr. Heater Portable Buddy Heater MH9BX offers a heating capacity ranging from 4,000 to 9,000 BTUs, which is ideal for smaller spaces up to 225 square feet, though it falls short for a 500-square-foot garage. This propane radiant heater provides direct warmth, making it effective for targeted heating of people and objects rather than larger open spaces.

Its safety features are commendable, including a tip-over switch and a low-oxygen safety shut-off system, ensuring reliable operation in various conditions. The heater is easy to ignite with its Piezo igniter and simple to operate with an adjustable knob, making it user-friendly even for non-tech-savvy individuals. Portability is another plus, thanks to its compact size, lightweight design, and fold-down handle.

However, you may need an optional hose and filter to connect to a larger 20 lb. propane tank for extended use. This heater is fuel-efficient, providing warmth for up to 6 hours on the low setting, which is economical for its size. While its coverage is limited, this product excels in smaller areas that require quick and efficient heating. The Mr. Heater Portable Buddy Heater is a solid choice for smaller spaces and temporary heating needs, but it may not suffice for a larger 500-square-foot garage.

The Mr. Heater F260560 Big Maxx MHU80NG is a powerful unit heater designed to efficiently heat spaces up to 2,667 square feet, making it a strong choice for garages and large outdoor areas. With a heating capacity of 80,000 BTUs, this natural gas heater can quickly warm up your workspace, which is particularly beneficial during colder months. One of its significant strengths is its flexibility in venting options; it can be vented both vertically and horizontally, which offers versatility in installation based on your garage setup.

In terms of safety, the heater features a high-temperature safety shut-off, which is essential for preventing overheating. The unit is designed for permanent installation, and while it’s relatively heavy at 88 pounds, it is ceiling mountable, which can save floor space. However, because of its weight and design, portability is limited compared to more compact or portable space heaters. Noise levels can vary, and while many users find it relatively quiet, some may notice the operational sounds depending on their sensitivity to noise.

On the downside, it does rely on natural gas, which may limit its use if gas lines are not available. Additionally, installation may necessitate professional help, especially for venting, which could further increase your expenses. If you are looking for a robust heating solution for larger garages or workspaces, the Mr. Heater Big Maxx offers impressive heating performance and safety features, but consider the installation requirements and additional components you'll need before making your purchase.

The Mr. Heater F260550 Big Maxx MHU50NG is a powerful space heater designed to efficiently heat spaces like a garage, with a capacity of 50,000 BTUs, covering areas up to 1,250 square feet. This means it can easily handle the heating needs of your garage even on the coldest days. One of its notable strengths is the powered exhaust system, which allows for flexible venting options, either vertically or horizontally, providing versatility in its installation. Additionally, it comes with a conversion kit for switching from natural gas to liquid propane, enhancing its usability based on your gas supply preferences.

Safety features include a high-temperature shut-off switch, which is essential when operating in enclosed spaces, ensuring you can use it with peace of mind. Its design also allows for a ceiling mount, which is a practical option for garages where floor space might be limited.

This heater is best suited for those looking for a reliable and powerful heating solution for larger garage spaces, especially if you already have natural gas or are comfortable with installation requirements.