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AC_Hacker · 07-29-13, 11:27 AM

Sounds like wonderful planning and execution for both of you.

Only idea I have on the sun wall is that a couple of layers of expanded metal lath, with a small separation, might be better than a sheet of steel, there would be more surface area and therefore more heat transfer.

I'm a bit dubious about covering a loop field with plastic foam, however. Only about 2% of your ground heat originates from deep earth. 98% comes from the sun.

I think I would try to look deeper into that issue, and try to get past hearsay... see if you can find any science on that kind of thing, before you actually do it.

Best,

-AC

07-29-13, 11:27 AM	#4
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Sounds like wonderful planning and execution for both of you. Only idea I have on the sun wall is that a couple of layers of expanded metal lath, with a small separation, might be better than a sheet of steel, there would be more surface area and therefore more heat transfer. I'm a bit dubious about covering a loop field with plastic foam, however. Only about 2% of your ground heat originates from deep earth. 98% comes from the sun. I think I would try to look deeper into that issue, and try to get past hearsay... see if you can find any science on that kind of thing, before you actually do it. Best, -AC __________________ I'm not an HVAC technician. In fact, I'm barely even a hacker...