How a Pellet Stove Works: Cleaning & Fuel Use

A pellet stove burns compressed wood pellets automatically. You fill a hopper; an electric auger feeds pellets into a burn pot at a rate set by the controller; a combustion blower supplies air and pushes exhaust out through a vent pipe; a convection blower sends warm air into the room. Because it runs on electricity, it needs a power outlet, and it stops in a power outage unless it has a battery backup.

The main parts

PartWhat it does
HopperHolds the pellets, often a day or more’s worth
AugerScrew that feeds pellets to the fire at a controlled rate
IgniterHot element that lights the pellets automatically (on most stoves)
Burn potWhere the pellets burn; needs regular emptying of ash
Combustion blowerFeeds air to the fire and pushes exhaust out the vent
Convection blowerMoves warm air into the room
Controller / thermostatSets the heat output

Pellet inserts fit into an existing fireplace; pellet furnaces and boilers heat a whole house through ducts or water. They work on the same principle.

Starting a pellet stove

Most stoves light themselves: fill the hopper, check that the burn pot is clean and seated, close the door, and press start. Follow your manual for the start-up sequence. If your stove is manual-light, use only the starter the maker approves.

Cleaning and maintenance

  • Burn pot: scrape or empty ash and clinkers as often as your manual says, often daily or every few days with heavy use.
  • Ash pan and glass: empty when needed; clean the glass when the stove is cold.
  • Heat exchanger: many stoves have a rod or scraper to pull while running or cold.
  • Vent pipe and blowers: inspect and clean at least once a season; many owners book a professional service before winter.
  • Gaskets: check the door gasket; a leak affects combustion.

Use a dedicated ash vacuum, never a household vacuum. Cleaner-burning pellets mean less work: see how to judge a pellet.

Installation and safety

Pellet stoves vent through a dedicated pellet vent pipe, not a regular dryer duct. In Canada, solid-fuel appliances are installed to the CSA B365 installation code and the maker’s instructions; many insurers ask for a WETT inspection (or, in Quebec, an inspection by a qualified heating professional). Ask your installer and your insurer before you light the first fire.

How much fuel does it use?

It depends on the setting and your home. A 40 lb bag lasts 18.1 kg divided by the stove’s burn rate; see how long a bag lasts for the calculation and heating pellets for fuel.

Frequently asked questions

What is a pellet stove?

A heater that burns wood pellets, fed automatically from a hopper by an electric auger, with blowers for combustion air and room heat.

Does a pellet stove work without electricity?

Most do not: the auger, igniter and blowers need power. Some models accept a battery backup; check with the maker.

How often should I clean a pellet stove?

The burn pot daily or every few days in heavy use, the ash pan and glass as needed, and a full clean of the vent and blowers at least once a season. Your manual has the schedule.