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Winter Fuel - Glossary of Winter Fuel Terms

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Winter Fuel - Glossary of Winter Fuel Terms

Anthracite Coal

Anthracite coal also known as hard coal is a smokeless winter fuel. It is an extremely hard, natural coal that burns very slowly giving off an intense heat. It was formed as a result of the great pressures exerted upon natural, organic material as it was crushed by folding rock strata during the formation of mountain ranges. Anthracite has the highest energy content of all coals and burns with a short blue flame emitting intense heat.


This is the non combustible material left behind after a fire has died.


Auxiliaries are those items that assist in the performance or function of other items. Examples of auxiliaries sold on the Big K site include matches, Paraffin and Firelighters.

Big Match

Big Match is the name given to our extra long safety matches.


Chim-clean is the name given to our chimney cleaning log. Just set it alight and your chimney is cleaner and safer. It also helps to prevent chimney fires for up to one year.

Fire Lighters

Fire-lighters are small highly flammable blocks that are used to ignite fires.


The Firelog offers a hassle-free way to ignite your fire. It is clean and convenient to use. Quick to light by simply igniting its wrapper, there is no need for firelighters, kindling wood and paper. They are very safe to use since they do not spark and they last for some 2 to 3 hours. The Firelog makes the ideal winter fuel since no seasoning is necessary.


The Firestarter is our quick, clean and easy way to light a fire. Just light the wrapper and it burns for up to 45 minutes. It is environmentally friendly, safe and easy to use. It is also authorised for use in smoke-controlled areas so can be used as part of your winter fuel regime, even in smokeless zones.


Firewood is defined as any wood suitable for burning. It is usually reserved as a term used to describe any wood that is unsuitable for any other use i.e. house building, boat building or furniture manufacture.

FSC Certified Wood

FSC certified wood is wood from forests that have been overseen and certified by the Forest Stewardship Council. They assess forest management using the FSC principles, criteria, and standards. Each certifier uses their own evaluation processes, allowing the FSC to remain outside of the assessment process which in turn, supports the integrity of the standard, and of the FSC system. Certifiers evaluate forest management activities, forest certification and tracking of forest products or chain-of-custody certification.

Green Wood

This term is used to describe wood that has not long been cut. It has not yet dried out sufficiently to be of optimum use in a fire or stove. Other terms that effectively have the same meaning are wet wood and young wood.


Hardwood is wood from non-monocot angiosperm trees. These are usually broad-leaved and deciduous – e.g. oak.

Heat Logs

Heat logs are the clean alternative to seasoned firewood for heating your home. They don't spit or spark and are produced using 100% recycled waste material. They are FSC certified and long lasting, making them an environmentally friendly choice. Heat logs are ideal for burning on wood fuel stoves, wood burners, open fires, pizza ovens and even outside in chimneas.

individually Wrapped Firelighters

Individually wrapped firelighters come in boxes of 18. They are ideal for taking away with you on camping trips since you need only take the amount you require and since they are wrapped, they will not contaminate anything they happen to come into contact with. Suitable for open fires, stoves and camp fires, they are clean and very convenient.

Kiln Dried Logs

Kiln dried logs have been dried out quickly to reduce their moisture content.


Kindling is small pieces of mostly softwood used to start a fire.

Log Store

A log store is usually a wooden structure, sometimes attached to the side of a house in a lean-to arrangement, which has been left open on two sides to assist in the drying out of logs.

Mixed Wood

The term used to refer to the content of a wood delivery, indicating that the consignment may contain a mix of different species and also, that there may be a mix of hard and soft woods.

Multi Fuel Burners

Multi fuel burners and multi fuel stoves are cooking or heating appliances that can be fuelled using a variety of combustible material.


A highly flammable substance used to light fires.

Seasoned Wood

Seasoned wood is wood that has been left to dry out over a period of one to two years. Seasoned firewood contains about 20 percent to 25 percent moisture content, compared to freshly cut or "green" wood, which can contain about 45 percent water.

Smokeless Zone

An area designated by the local authority where only smokeless fuels are permitted.

Smokeless Fuel

Smokeless fuels are man-made or natural fuels that do not emit smoke when burnt.


Softwood is the name given to the wood from coniferous trees – e.g. pine.

Solid Fuel

Solid fuel refers to various types of solid material that are used as fuel to produce energy and provide heating, usually released through combustion.