Harman, Quadra-Fire, Napoleon and Summers Heat all make reliable pellet stoves, reports Consumer Search. Although features vary among manufacturers, the size of the pellet hopper, the thermostat control, and the availability of a backup power supply are three elements that affect how reliable a stove is.
Pellet stoves heat using convection, so they require fans to get the air moving, explains Consumer Search. Some stoves feature a backup battery to supply electricity in case of a power outage. The size of the hopper that feeds pellets to the fire affects how long a stove provides heat. Some thermostats control both the hopper feed rate and the blowers, while others only monitor the hopper.