Geothermal System Using Horizontally Bored Loop
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Uploaded by Ecohillsolutions on Jan 11, 2009
This EcoHill project is a four ton system that used a horizontal bore loop. This water to air system is giving the owner huge savings over his old natural gas system.
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In moderate climates that is
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It seems like inverter air source heat pumps will soon squash Geothermal dead
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@mstrblstr3 FHP
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What type of heat pump are you using?
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I noticed that you didn't insulate your loop pipes inside the house, do you ever have condensation issues
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Thank you for the information.!
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I am curious about how much cost per 100 foot bore? We would need 5 ton (500 feet) total. Drilling costs seems to be big variable here. Mostly fractured limeston 'Karst' geology?
CITGAB 2 years ago
A rough estimate is $2,200 per ton with bentonite and this includes the loops into your house.
Ecohillsolutions 2 years ago
I was wondering why dont you dig your manifold pit first then drill through it, instead of risking hitting the pipes trying to dig it after the drilling is done? Have you considered making a 12"x12" hole in the floor by the furnace to drill to for your supply/return instead of going threw the wall? You might find to be less prone to leaks and cracks. I was also curious how thick your mixing the bentonite.. 2 bags per 500gallon? this is a much debated topic right now (bentonite grouting)
wuboring 2 years ago
Yes. Our usual process is to trench and run the bore. This day the trencher was "stuck" at another job so we had to carefully executed this. Up through the basement, is a very viable option depending on the size of the footings. Four and five foot frost walls are common which enters in to the decision making process.
Regarding the bentonite- depending on conditions, but we are finding 2 bags isn't enough. We use pure bentonite now and putting as much as 6-7 bags /750 gallons.
Thanks.
Ecohillsolutions 2 years ago
What do you use to mix the bentonite that thick and pump it down hole? Ive never tried it but it doesnt seem like a MX125 and a 30gpm water pump on a drill would pump it that thick Thank you for the insight
wuboring 2 years ago
It's the thickness of a milk shake but the borerig's pumps handle it no problem.
Ecohillsolutions 2 years ago