solar & geo 101
Last Post 31 Oct 2008 05:24 PM by Alex_in_FL. 2 Replies.
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lisa6801User is Offline
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13 Jul 2008 04:38 PM
I am new to this site and keep flipping between the geo and solar groups.   Building in central virginia (madison) looking at geo with solar but trying to see if it is worth adding the solar portion. Have not started building yet. What is the best way to see if it is worth the cost to have both  as it seems that I may be trying a duplication of effrot here in some areas.  Trying to learn the capabilities and pros and cons.
any suggestions of where to point me is appreciated.  Lisa
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13 Jul 2008 07:05 PM
Posted By lisa6801 on 07/13/2008 4:38 PM
I am new to this site and keep flipping between the geo and solar groups.   Building in central virginia (madison) looking at geo with solar but trying to see if it is worth adding the solar portion. Have not started building yet. What is the best way to see if it is worth the cost to have both  as it seems that I may be trying a duplication of effrot here in some areas.  Trying to learn the capabilities and pros and cons.
any suggestions of where to point me is appreciated.  Lisa

Lisa,
I would concentrate on your structure 1st. Super Insulate. Once you have that covered, everything else becomes a lot easier(less BTU's required). Solar? You didn't mention what type(Active, Passive or PV).

I like Geo, but it is expensive(to install) and does consume copious amounts of electricity.

Lots of options, and once you narrow them down, we can probably help you.
....jc<br>If you're not building with OSB SIPS(or ICF's), why are you building?
Alex_in_FLUser is Offline
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31 Oct 2008 05:24 PM
You need to do a payback analysis to determine which way to go. When you say you are considering solar do you mean PV, hot water, or a solar assisted GSHP or all of these? A GSHP can provide some of your hot water at about 25-50% of the normal hotwater rate so yes there could be overlap.

Insulation and tightly sealing your house during construction has a very good payback (plus better comfort). Radiant barrier insulation is generally cost effective to if done during construction. Energy efficient windows are also very valuable (about 30-40% of heat loss can be through windows).

Alex
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