Internal firebox: See also "Firebox".
kW: Kilowatts per hour. See also "Firebox".
Liner: See Chimney liner.
Log store: An area under a stove for storage of logs. May be a separate part (can be retrofitted) or may be part of the actual stove design (cannot be retrofitted).
Max. output: Stovefitter's deduction of maximum output using a reasonably full fuel load.
Multi-fuel: Can burn wood, smokeless fuel or coal.
Nominal: "about" or "approx."
Renewable energy: is energy that is collected from renewable resources, which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat
Smoke Control Area: A smoke control area is a legally defined area where only approved solid fuels or exempted appliances (eg wood burning stoves) can be used within buildings. You could face a fine of up to £1,000 if you break the law.
Useable height: A Stovefitter's term that helps determine how much fuel can be stacked in a stove - equal to 15cm above the point at which fuel can fall out of the firebox when the stove door is opened. Any higher than this and opening the door increases chance of fuel falling onto hearth.
Wood burning stove: Can burn only wood. Some stoves can be retrofitted with a multifuel-kit (usually just a grate that is fitted into the bottom of the stove, a five-minute task).
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