Fordguy,
Hook it up with hoses and run water through it to test it BEFORE you do a lot of digging. About 5 gallon per minute (20 liters/min) is about right. Measure the water input and output temps. Measure the air input and output temps. Let it run for a couple hours.
Your cost - the amount of water and maybe $1 in electricity . . .
Let us know.
This is awesome for $425!!!!!!!
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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