HEATING, VENTILATION & SERVICES 51
STOVES AND CHIMNEYS WORKING AS ONE
Dennis Milligan of The British Flue & Chimney Manufacturers Association (BFCMA) explores the upcoming requirements for stoves, and the best design, installation and maintenance techniques to ensure their best performance.
meet Defra’s new stringent particulate (PM) emission limits. From 1st January only new stoves that meet the Ecodesign emission limits can be put on the market for sale in the UK and Ireland. However, it will still be possible to buy a stove that was manufactured and offered for sale before 1st January, but it is advisable to future proof your purchase and help the environment by buying an Ecodesign stove.
N
ext year will see Defra introduce the requirement for Ecodesign stoves that have been designed to
Defra is also making it easier for stove owners to buy dry wood. It has been long known that dry wood burns better than wet, but it is now known that dry wood gives off significantly fewer PM emissions. The small bags of wood that you can buy from supermarkets and petrol station forecourts must have a moisture content below 20%. This has been found to be the moisture limit required to keep down particulate emissions. It also helps to keep the flue cleaner. Look for the Ready to burn logo on the bag.
FLUES & CHIMNEYS A stove requires a flue to conduct the products of combustion safely to the atmosphere. To work well the stove and flue must work together as a unified system. When a new stove or flue is installed, it is important that a draw test is carried out to prove that the stove/flue system is working properly. The installer should carry this out when he has installed the stove. Most residential chimneys/flues rely on
natural draft, the pressure difference between cold and hot air, to draw the flue
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