How It Works Pellet Fires have a fuel hopper, storing 20 kg of pellets. Pellets are automatically fed into the burn pot where a simple electrical ignitor lights the fire. Feed frequency is controlled by an external dial and regulates actual heat output. Combustion air is drawn through the burn pot by an exhaust fan ensuring perfect air to fuel ratios and maximum efficiency. Fresh air is passed through a series of heat exchangers and fan forced into your living room using a speed convection fan. Additionally, heat from the burn pot radiates through the glass door. This dual system ensures an authentic ambience and unparalleled heat efficiency.