Pellet stoves are usually paired with another heat source. They have a hopper, an auger, and a burn pot. The auger turns, moving pellets from hopper to burn pot. Fans stoke the flame, and the fumes exit through a metal duct.
Pellet stoves need the right mix of air, pellets, and flame. If the mix is off, you may need to make adjustments.
Though pellets burn hotter and cleaner than regular wood, pellet stoves still need regular cleaning. Check your stove’s manual for details. Get a professional inspection every year, before the heating season starts.