[GSBN] Natural ventilation.

[Tom Hahn]

Being just an architect (not a powerhouse of building science like 
some on this list...), I hesitated to point out what Rob has so noted 
below... but I have the same concern about whether passive (or even 
powered...) flow from a 4" opening will do much toward the stated 
whole-house cooling goals.

We had a student here this past semester at Ecosa propose something 
similar.  I suggested then that he  do some quick "back of the 
napkin" thermal/airflow calculations to check the maximum theoretical 
effectiveness before spending too much time and "tech" on the control 
mechanisms to make it happen...  Prescott's soil temp's and cooling 
loads are, granted, much higher than Ontario, but it was a long way 
from making a dent in the total cooling needs.

Tom

>
>And all that being said, I am more than a little sceptical of the 
>efficacy of a 100 mm ID passive supply air inlet for whole-house 
>cooling. I suspect that we'd be talking more along the lines of 
>something
>with at least 10x that in cross-sectional area.
>
>
>
>--
>=== * ===
>Rob Tom
>Kanata, Ontario, Canada
>< A r c h i L o g i c  at  Y a h o o  dot  C A >
>(manually winnow the chaff from my edress if you hit REPLY)
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