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In this photo the two blue circles show two of the air inlet ports. This design was built such that the single air intake on the outside of the wall split to three smaller air outlets inside the furnace. The lower blue circle shows the inlet that points towards the centre of the lower end of the oval. The upper blue circle shows the inlet that points straight into the middle of the furnace. There is a third inlet (not visible) that directs air to the centre of the other end of the oval. Previous Report Next Text © Neil Peterson, 2017 Photographs © Richard Schweitzer, 2017 Copyright details Contact us |