10 Best 240 V Garage Heaters 2025 in the United States

The TEMPWARE Electric Garage Heater is a solid choice for heating large indoor spaces like garages, workshops, or greenhouses up to about 1,250 square feet. It offers a strong heating capacity of up to 25,590 BTUs with a maximum wattage of 7,500 watts, which is quite powerful for its class. The heater features adjustable louvers and mounting angles, allowing you to direct warm air where it’s needed most. The built-in thermostat lets you set temperatures between 45°F and 95°F, giving good control over comfort levels.

Energy-wise, it includes an ECO mode and a 12-hour timer, which help reduce electricity use by adjusting operation based on the room’s temperature. Safety is well covered with overheat protection and ETL certification, ensuring the unit meets safety standards. The heater is designed for ceiling mounting and must be hardwired by a professional electrician, which means installation is less convenient if you’re looking for a simple plug-and-play option. It does not come with a power cord, so keep that in mind. As a fan-forced heater, it will produce some operational sound, which should be moderate but might be noticeable in quiet settings.

This heater is best suited for those needing powerful, energy-efficient, and safe heating in a fixed indoor space, especially if you prefer a ceiling-mounted unit to save floor space.

The KING KB2410-1-B2-ECO KB ECO2S Garage Heater is a powerful option for heating large spaces, with a 10000W output and a heating capacity that covers up to 900 square feet. This makes it suitable for bigger garages. The built-in thermostat control allows for precise temperature regulation, which can enhance comfort and energy efficiency.

Additionally, it comes with a remote control for convenient operation and a universal wall/ceiling bracket for versatile mounting options, although it is primarily designed for floor mounting. Safety features include a built-in fan delay to dissipate residual heat after the heater is turned off, reducing the risk of overheating. The heater also includes summer fan only and timer modes, which add to its versatility.

Energy efficiency is above average due to the precise thermostat control, but the high wattage means it might consume a significant amount of electricity. This product is quite heavy at 37.5 pounds and may require more effort for installation. This heater is best suited for users needing robust heating solutions in larger indoor spaces like garages.

The TEMPWARE 240V Garage Heater delivers strong heating power with up to 17,060 BTUs and 5000 watts, making it suitable for garages or workshops up to around 590 square feet. It offers three heat settings (3000, 4000, and 5000 watts) and an adjustable angle to direct warm air where you need it. The built-in thermostat lets you set temperatures between 45°F and 95°F for customized comfort.

An ECO mode helps save energy by automatically adjusting heat output or turning off when the desired temperature is reached, and a timer allows you to schedule operation up to 12 hours. Safety is well covered with ETL certification and an overheat protection sensor that shuts off the unit if it gets too hot.

As a hardwired ceiling mount heater, installation requires a qualified electrician, and it does not come with a power cord, so professional wiring is essential. This model is designed exclusively for indoor use and is best suited for those looking for a permanent, powerful heating solution in a garage or workshop setting. For those seeking a plug-and-play option, this unit may not be ideal due to the required hardwired installation.