If you own a solid fuel stove you may have experienced problems when the door glass starts to blacken with a layer of soot or dirt?
It is to be expected that in the confined space of your solid fuel stove, there will be some by-products present, especially if your stove is an older version and does not feature an in-built airwash system that many solid fuel burners now feature. Airwash is a design feature that uses a specially placed vent or vents to draw in air from the outside to wash over the inside of the glass. This helps to keep the glass clean, allowing you to enjoy the glow and flames to the full.
Below are some of the reasons for your solid fuel stove glass turning black and a few solutions to assist you to deal with the problem:
Burning unseasoned wood
This is one of the main reasons why your solid fuel stove glass might be turning black. Burning wood, which is unseasoned, means energy is used on evaporation rather than burning and the incomplete burn results in excessive smoke being produced. This results in by-products such as tar, soot and creosote settling on the glass.
Burning House Coal
Burning house coal in your solid fuel stove will increase the chances of the glass blackening and most solid fuel stove manufacturers recommend you avoid using house coal and instead opt for smokeless fuels. Burning house coal on a closed appliance means the tar and smoke particles can find their way onto the stove glass. Even the most modern airwash system will build up a volume of tar and dust generated by burning house coal.
Lack or incorrect use of Airwash
Most modern solid fuel stoves are built with their own airwash system preventing the build up of soot on the glass. Airwash systems use the vent at the top of the stove to direct a thin layer of air across the glass to wash it and reduce the build up of soot, dirt and grime.
However, not using the airwash system correctly can also result in blackened glass. If your stove is not burning at a high enough temperature (for example, by burning a small fire in a large stove), the airwash will not function properly as the stove is not hot enough. Try to avoid closing your airwash vent completely when using your stove as this can also lead to soot build up.
Fuel touching the glass
Be careful not to overfill your stove with fuel or load the fuel so it is touching the glass, as this can lead to the glass blackening in a couple of areas, rather than the entire surface.