I can't tell you how a heat pump--air to air--works. But a geothermal system works by compressing the air after transfer the heat from the underground/underwater liquid. The compression is what raises the air temp to something over 100 degrees. That get blown through the house. BTW If you use a well system or underground loop system the cost of a geothermal system should be the cost of a conventional forced air system plus the cost of the wells or the cost of the loops. I had to argue with the heating company but they finally saw my point. My wells were $2000 each and that's exactly how it worked out.
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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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