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Originally Posted by GaryGary
Hi,
Just wondering how you plant to insulate the 100 ft pipe?
Gary
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It will be surrounded by 3" of XPS similar to what you did with yours.
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If you have a way to make sure that the panels never get above 90...
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That can be done. I am building my own differential controller to control the system so I can do whatever I want.
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...I would say to use the PEX but there are dual PEX pipes available in a plastic case with urethane insulation meant for underground that you could get. It would ensure that you had minimal heat loss and keep it sealed. Remember that 100ft one way is a long distance.
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I looked into commercial insulated options. IMO they don't offer nearly enough R value, and they're incredibly expensive. Most of the stuff I saw had only around R3 (where mine is R15), and it cost 3X more than what I am doing.