Pellet Stoves

Pellet Stoves: How They Work and What to Consider

A pellet stove burns compressed wood pellets fed automatically from a hopper, controlled by a thermostat. That makes it the most hands-off form of wood heat: you fill the hopper, set a temperature, and the stove meters fuel to hold it. Because combustion is so complete, pellet stoves vent through a small pipe rather than a full masonry chimney.

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Before You Buy

Freestanding or insert

Freestanding stoves sit on a hearth pad and vent through a nearby wall - the simplest installation. Inserts fit into an existing fireplace opening and vent up the chimney with a liner, which suits a house that already has a masonry fireplace going unused.

Venting and clearances

Pellet stoves use pellet vent pipe, typically out through an exterior wall with a short vertical rise. They still need clearance to combustibles and a non-combustible floor protector in most installations, which is what hearth pads are for.

Fuel handling and power

Pellets come in 40 lb bags and need dry storage - a stove in regular use gets through roughly a bag a day in cold weather. The auger, fan and controls run on household electricity, so a stove will not operate in a power cut unless you provide backup power.

Frequently Asked Questions

How does a pellet stove work?

An auger feeds compressed wood pellets from a hopper into a burn pot at a rate set by the thermostat. A combustion fan supplies air for near-complete burning, and a second fan circulates warm air into the room. Ash volume is very low because the fuel burns so completely.

Does a pellet stove need a chimney?

No. Pellet stoves vent through a small pellet vent pipe, usually straight out an exterior wall with a short vertical rise. A full masonry chimney is not required, though an insert installed in an existing fireplace does use a liner up the existing chimney.

How much does it cost to run a pellet stove?

It depends on pellet prices and how hard the stove works, but a stove in steady winter use consumes roughly one 40 lb bag per day. Because output is thermostat-controlled, a pellet stove usually burns less fuel than an equivalent wood stove run by hand.

How many watts does a pellet stove use?

Typically 100-300 watts in normal running for the auger, fans and controls, with a brief higher draw during ignition. That is small, but it does mean the stove needs mains power - or a battery backup - to run at all.

How often do you clean a pellet stove?

Empty the burn pot and ash pan regularly during the heating season - weekly for a stove in daily use - and have the vent and heat exchanger cleaned thoroughly once a year. Consistent cleaning is what keeps feed rates and efficiency where they should be.