How does a pellet fire work?

How does a pellet fire work

 

Wood pellets are placed into a hopper (1)

An electric auger (3) feeds the pellets into a burn grate (7) at a rate determined by the temperature control

An automatic igniter (5) starts the fire (optional on some units)

Fire heats the air in heat exchange tubes (6) and a convection fan (2) blows this heated, uncontaminated air into the room where a stove is situated

There is an ash pan (4) below the burn grate into which the residue falls. Typically, a stove only needs to be filled once a day and the ash pan needs to be emptied only once or twice a year.