Correct. It's a closed system containing an anti freeze solution that runs through coils in one of the tanks. There's a second set of coils,seven meters long,that runs cold water in,hot water out the other end of it for the domestic hot water. The actual water in the tanks circulates through the boiler and the heating system in the house. There's a valve down toward the lower left of the schematic that Thoger says is kind of key to the whole thing. I guess it either sends the water through the boiler or through the radiators and in floor heating if the boiler isn't burning.
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Today's Featured Article - A Belt Pulley? Really Doing Something? - by Chris Pratt. Belt Pulleys! Most of us conjure up a picture of a massive thresher with a wide belt lazily arching to a tractor 35 feet away throwing a cloud of dust, straw and grain, and while nostalgic, not too practical a method of using our tractors. While this may have been the bread and butter of the belt work in the past (since this is what made the money on many farms), the smaller tasks may have been and still can be its real claim to fame. The thresher would bring in the harvest (and income) once a y
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