[Greenbuilding] Water heaters/Solar

[barbara deane-gillett]

i think that's unfair.  
 
dawn solar has a unique product based on the idea that because people would like solar systems to be invisible, one can sacrifice some performance and obtain an attractive functional system at a reasonable price.  they have designed the system to be integral with and installed under a metal roof by roofers. because the system has no outer glazing, it works best as a solar dhw preheater (nearly all solar dhw systems are preheaters in winter, so you don't lose much)  or a radiant floor heater.  it of course has more trouble in colder climates, but for the homeowner who wants appearance first and performance second.
 
 it is a reasonable alternative particularly for the owner already interested in a metal roof.  the system is fsec rated and qualifies for the credits. because the system is relatively inexpensive per sq.ft ( $20 vs $100)  one can install more sq.ft to make up for some performance loss of not having a glazing.. 
 
they also have a unique version which has pv glued to the metaql roof. a small side benefit is that cooling the pv with the solar dhw slightly increases the pv performance. 
 
they have been at it now for over five years with reasonable results.> Date: Mon, 5 Nov 2007 21:52:45 -0600> From: Unschooler at atlasok.com> To: kbeiser at centurytel.net; GREENBUILDING at LISTSERV.REPP.ORG> Subject: Re: [Greenbuilding] Water heaters/Solar> > Ken,> > If you go to the archives and search for "Dawn Solar" you'll read > several past conversations about it. They have generally been negative.> > --Leslie> > > Ken Beiser wrote:> > Sorry for the cross post but the subject of solar water heaters under metal roofs is on my mind right now.> >> >> > > > _______________________________________________> Greenbuilding email list> Environmentally-preferable design, construction, building elements> List info: http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.org> List email: Greenbuilding at listserv.repp.org> Managed by BuildingGreen, Inc. http://www.buildinggreen.com> publisher of Environmental Building News and GreenSpec> Hosted and archived by REPP / CREST http://www.crest.org> To get on the list:> http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.org> or mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe> To get off the list:> http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.org> or mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe