XPost: alt.tv.hometime, alt.building.construction, alt.tv.home-imprvment 
 XPost: alt.home.automation 
 From: philscott@philscott.net 
  
 "Some Guy"  wrote in message 
 news:42C0095A.4263E2C0@Guy.com... 
 > Phil Scott wrote: 
 > 
 > > > I think only the roof makes a workable item to cool with 
 > > > water cooling.  It's designed to get wet, to collect 
 runoff, 
 > > > and gets very hot in the summer, and cooling it can lead 
 to 
 > > > reduction in cooling requirements of the house. 
 > > 
 > > Its workable...but there are problems ..its seldom used 
 > > because of those problems. 
 > 
 > Would you care to mention what those problems are? 
  
 Water is a corrosive.  Would mildly wear the roofing but with 
 your limited use not much... 
  
 Mineral deposits with your limited usage would be minor but 
 still a negative factor. 
  
 The net benefit of water cooling the roof would be close to 
 the benefits of attic air ventilation..attic air ventilation 
 would not have that set of minor problems though. 
  
 Your suggestion is workable  just not the optimum as I see it. 
 It would be optimum however say in the deep south west with 
 air temperatures over 110 in the shade...  but then mineral 
 content of the water is higher there and could be a very 
 significant problem one would have to look at...  it is 
 typically not done. 
  
 I might be inclined to put a spray misting system in the attic 
 air make up stream.  that would work. 
  
 However misting companies will not sell into a high mineral 
 content water area because the minerals destroy their PD pumps 
 and clogg the micro nozzels....thus...we see swamp coolers 
 used in the south west. 
  
  
  
 Phil Scott 
  
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