Thelin Hearth Products started in business in 1978 and have been making pellet heaters since 1987, which makes them one of the earliest producers of this type of stove.Located in Sacramento, California, they are known for their build quality and have invested heavily in accurate machining equipment including CNC technology in bending, laser and water jet cutting. As a result of this investment, the business fabricates components for industries such as electronics, semi-conductor, aerospace and medical devices. These pellet stoves are ingenious in that only one fan motor is used, and both the combustion and convection fans are driven from it, using blades of different pitch. All these pellet stoves run on twelve volts, using a step down from mains power. This means that they will run on a twelve volt DC battery in case of a mains power outage. These stoves also automatically keep a battery charged up when it is connected.