http://tech.groups.yahoo.com/group/SimplySolar/ SimplySolar Thu, 07 Jan 2010 01:07:08 GMT se_smith http://tech.groups.yahoo.com/group/SimplySolar/message/4409 http://tech.groups.yahoo.com/group/SimplySolar/message/4409 Chad, Gary's recommendation of about 2 cfm/sq ft of collector sounds about right to me. My downspout collector has approx 96 sq ft of glazed area. I get Wed, 06 Jan 2010 23:35:51 GMT John Canivan http://tech.groups.yahoo.com/group/SimplySolar/message/4408 http://tech.groups.yahoo.com/group/SimplySolar/message/4408 Oops!. I think I said this backwards. It should be... Single pane: high heat gain, high heat loss Double pane: low heat gain, low heat loss Net heat gain Wed, 06 Jan 2010 23:04:10 GMT John Canivan http://tech.groups.yahoo.com/group/SimplySolar/message/4407 http://tech.groups.yahoo.com/group/SimplySolar/message/4407 I think Gary may have some charts on thermopane heat gain as opposed to single pane heat gain. Basically single pane will have lower heat gain and higher heat Wed, 06 Jan 2010 22:55:14 GMT CJE http://tech.groups.yahoo.com/group/SimplySolar/message/4406 http://tech.groups.yahoo.com/group/SimplySolar/message/4406 Doug, On a two-story house (let's call it: 18 feet from soil to soffit) how wide do the roof overhangs have to be in order to provide this summer shading Wed, 06 Jan 2010 20:39:55 GMT C Dana Thomas http://tech.groups.yahoo.com/group/SimplySolar/message/4405 http://tech.groups.yahoo.com/group/SimplySolar/message/4405 Someone, it might have been nufan, but someone here had a very cool idea for cooling their house. Stop me if you've heard this. The idea is to make cool water Wed, 06 Jan 2010 19:40:27 GMT Doug Kalmer http://tech.groups.yahoo.com/group/SimplySolar/message/4404 http://tech.groups.yahoo.com/group/SimplySolar/message/4404 Another positive testimonial to passive solar designs- http://www.greenhomebuilding.com/QandA/sustainable/passive.htm I lived for many years in a mostly Wed, 06 Jan 2010 19:26:22 GMT Doug Kalmer http://tech.groups.yahoo.com/group/SimplySolar/message/4403 http://tech.groups.yahoo.com/group/SimplySolar/message/4403 I am not the only one who knows from personal experience that passive solar design, properly done, will work well. Here's a sucessful retrofit- Wed, 06 Jan 2010 19:18:25 GMT yreysa http://tech.groups.yahoo.com/group/SimplySolar/message/4402 http://tech.groups.yahoo.com/group/SimplySolar/message/4402 Hi, Interesting discussion on aluminum soffit material for air heating collectors. Its a nice material to work with, and sturdy enough to work with and hold Wed, 06 Jan 2010 19:08:28 GMT Chad Urvig http://tech.groups.yahoo.com/group/SimplySolar/message/4401 http://tech.groups.yahoo.com/group/SimplySolar/message/4401 I'm not sure how I got my previous number because it's very wrong! My bad. My numbers (backpass collector): Collector area: 16.41 sq. ft. Total CFM: 70 Wed, 06 Jan 2010 19:02:39 GMT Doug Kalmer http://tech.groups.yahoo.com/group/SimplySolar/message/4400 http://tech.groups.yahoo.com/group/SimplySolar/message/4400 **My embedded replies** ... Agreed! This is why I love set-back thermostats: Have the heat go off a few hours before bedtime so that the house will cool down Wed, 06 Jan 2010 18:15:00 GMT joe3 http://tech.groups.yahoo.com/group/SimplySolar/message/4399 http://tech.groups.yahoo.com/group/SimplySolar/message/4399 I'm in Florida and that combination seems to be my best choice. I recently (Christmas) moved into my not quite finished remodeled 500 ft2 home. I plan on using Wed, 06 Jan 2010 17:33:11 GMT Bob Allan http://tech.groups.yahoo.com/group/SimplySolar/message/4398 http://tech.groups.yahoo.com/group/SimplySolar/message/4398 Hi Chad, I run a measured 165 cfm through my 64 sq ft backpass collector or 2.6 cfm/sq ft. My delta T is from a feed of 65 F with a discharge of from 90 to Wed, 06 Jan 2010 17:08:37 GMT Chad Urvig http://tech.groups.yahoo.com/group/SimplySolar/message/4397 http://tech.groups.yahoo.com/group/SimplySolar/message/4397 Yes, I noticed for $64 I could get one roll of foil that would cover a 1500 sq. ft. collector. Now that's big. I don't think more thermal mass boosts your Wed, 06 Jan 2010 16:51:48 GMT Kevin DeCatfish http://tech.groups.yahoo.com/group/SimplySolar/message/4396 http://tech.groups.yahoo.com/group/SimplySolar/message/4396 To date, all my panels are patio doors, because I have a friend who installs them and offers me the discards. I leave them double paned. Maybe the reason I do Wed, 06 Jan 2010 16:39:31 GMT Kevin DeCatfish http://tech.groups.yahoo.com/group/SimplySolar/message/4395 http://tech.groups.yahoo.com/group/SimplySolar/message/4395 Yeah, thats my thinking, Dan. We might as well use our homes own ambient temps as insulation with losses actually feeding the house. Most of us are