Here is another example of industrial scale sweeping that I have undertaken! I recently swept the chimney of this large biomass boiler that is on an estate in the Linton area. The boiler is used to supply heat and hot water to the rather large main residence, some industrial buildings on the site and to a number of estate cottages. This biomass boiler runs by burning specially made wood pellets; they are a small pellet of compressed wood shavings. Apparently they are designed in such a way to optimize the burn and efficiency of the biomass boiler. Again, as in the previous blog to do with biomass boiler sweeping, the wood chips are stored in a hopper in a very large barn, which is directly adjacent to the shed that houses the biomass boiler. The pellets are gradually fed into the biomass boiler by a large Archimedes screw and the hopper is periodically topped up by fresh deliveries of pellets. The boiler chimney was rather large eight meters in height and had a diameter of 38cm; I swept it using manual rods and brushes; somewhat surprisingly the chimney was not particularly dirty, probably due to the very efficient operation of the biomass boiler. Fascinating stuff!