Quote:
Originally Posted by AC_Hacker
I think the way to go is to use plastic pipe and circulate water, plus radiator. As far as brine, use more pipe and rely on water as your heat transfer media. The radiator will be the single site of condensation, and it will be easier to manage, both in terms of dealing with moisture and bacteria.
I think earth tubes are great in dry areas, which your green island is not.
Passive House seems to be going for earth tubes. Maybe research those forums.
Keep us posted!
-AC
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We are going for plastic water pipe, either 4 loops of 25mm or 2 loops of 32mm, each loop 100m.
Simpler to run than earth tubes and takes less of a chunk from the foundations. Also more controllable than earth tubes so when the ambient temp on a sunny winters day exceeds the underground temp the water pump can shutdown, same for summer nights when the air temp drops below the underground temp.
Updates on this will be on my renovation thread towards the end of this year when we have the extension up and i can start connecting everything i've been working on the last couple of years.
Thanks
Steve