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Second attempt at a furnace

(Click to enlarge photo)

This was still a similar furnace to my first but this time with a collection of oil-drums to store the hot water. I was particularly interested in getting the flow of water right before I built a more serious heat-store. I knew the furnace would need a re-design to automate it and the heat store was going to need lots of insulation before there would be any realistic chance of storing heat but, it was still good fun to see what was possible with all the pumps and fans etc.