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Geothermal pipe layout: Continuous loop vs main with laterals after manifolds.
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seedcleaner
Posted 11/22/2012 12:50 (#2710948 - in reply to #2710154)
Subject: Re: Geothermal pipe layout: Continuous loop vs main with laterals after manifolds.


Mid-Missouri
I talked to the installer again today as he was working. He jokingly said this was his five thousandth one he has installed. The 1 1/4" pipe is 6 feet down in wet clay. He is doing about 1750' per four ton house unit in a single loop style per unit. He often does the 3/4" manifold version but we have alot of room available, with wetter soil and he said this method is alot less labor, although a little more cost for the pipe (per foot or per job I don't know).

I mentioned the amperage for the pump on this bigger line. I guess it is pumped pretty slow, He said a lamp cord would be big enough to power the pump. The 3/4" has elbows that restrict flow. He is welding (fusing) the lines together. He stands behind the work, just as my HVAC guy does.

I guess none of it really matters as long as the fluid coming back in is about 55 degrees and the pumps don't work too hard?
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