passive solar sanity check [RE-wrenches]

[Dean T. Newberry]

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Hi Kurt,
The overhang problem is easy to draw, more difficult to type out.
Use a 30 - 60 triangle on a side elevation or section including the window.
Project a line out from the top of the window upward at 30 degrees from 
the horizontal.
Project a line out from the bottom of the window upward at 60 degrees 
from the horizontal.
Put the bottom of the gutter or facia board at the point where the two 
lines cross.
This doesn't need to be very accurate, just plan to get it close.

cul  deant





Kurt Albershardt wrote:

>
> I've got a client with a project located in north central California 
> and with decent southern exposure.  Her architect (who lacks both the 
> software and the experience to do overhang calculations) and her 
> contractor are telling her that it's probably not worth increasing the 
> window area on the south face because of increased nighttime heat 
> losses.  These are the same people who put a 7 foot overhang on the 
> south windows.
>
> Is there some simple formula to help sort this out, or at least a 
> guideline that will show the effects of increasing window area with 
> different U-values?  The architect is donating his time to a nonprofit 
> and the budget just isn't there to pay for a professional study, 
> unless she can show them something to change their minds.
>
>
> --TIA
>

-- 
Dean T. Newberry

http://www.TalbottSolar.com
Email:  deant at dcn.org

Cell:      530 867-2392
Fax:      530-758-8187

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