10 Best Garage Heaters 2026 in the United States

The Rinnai EX38DTN is a natural gas-powered, wall-mounted heater that offers a strong heating capacity of 38,400 BTUs, making it suitable for warming medium-sized indoor spaces like bedrooms, home offices, or study rooms. Its direct vent design ensures efficient and safe combustion by expelling fumes outside, which is particularly important for indoor use. One of the heater’s standout features is its advanced modulating technology, which keeps the room temperature steady and avoids cold spots, providing consistent comfort. The programmable thermostat and Wi-Fi compatibility add convenience, allowing you to set and maintain the temperature easily according to your schedule.

The Rinnai EX22DTWP is a wall-mounted propane heater designed to efficiently warm indoor spaces up to around 1,600 square feet. With a heating capacity of about 20,700 BTUs, it provides consistent and even warmth thanks to advanced modulating technology that adjusts heat output to your needs, helping avoid cold spots and saving fuel. Since it runs on propane gas, it doesn't rely on electricity for heat, which can be a plus in areas where electric power might be limited, although it does use 60 volts for controls and ignition.

The Rinnai EX11DTN is a natural gas wall-mounted heater designed to efficiently warm indoor spaces up to about 1600 square feet, making it suitable for garages, bedrooms, or home offices. It delivers a steady 11,000 BTUs of heat using radiant and forced air methods, which helps avoid cold spots and keeps the room evenly warm. The heater is powered by natural gas, which can be cost-effective for continuous use compared to electric models. Safety is a strong point with a cool-to-touch exterior and built-in self-diagnostic electronics, making it a safe choice for households with kids.