Evacuated Tubes [RE-wrenches]
Todd Cory, Mt. Shasta Energy Services
toddcory at finestplanet.com
Sun Nov 18 01:18:11 PST 2007
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I wonder how the btu/sq ft of the two technologies compare?
Todd
Kurt Albershardt wrote:
>
> Good points, but I am not as convinced on the cost. The combination
> of 'new improved' copper pricing and overseas ET production the
> differential has narrowed quite a bit.
>
> We are planning a 52 ET collector array in southern NM (6000', but
> snow is rare) which should meet ~50% of the mid-winter heat load on a
> 1938 mid-rise brick/concrete building. If suitable roof area is a
> limiting factor, ET quickly becomes the obvious solution.
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