[Greenbuilding] Hydronic systems for cooling.

[Alan Abrams]

<Harry Thomason cooled 
his Wash DC house by trickling water over an asphalt shingle roof at 
night in the 1960s. He said the shingles spread the water out nicely 
into a sheet. It might be close to the night wet bulb temp, or cooler, 
with night sky radiation on a still clear night. Water under rocks might 
be closer to the dew point.>

very interesting--was Thomason using tap water, I wonder, and if so,
recirculating it?  

For that matter, Nick, can you refer us to a more detailed brief on this
house?

Thanks-
Alan Abrams AIBD
Washington, DC (where we would be delighted if a July day--or night--were
only 75.6d)