Replies

1. 
   Guest_ | Aug 29, 1999 07:26pm | #1

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   ml

   Since no one is responding, I'll give it a shot.

   WARNING This dissertation is based on a love of primitive navigation and math. I do not do awnings. Hopefully this will help move you in the right direction or at least generate conversation,

   At the spring and fall equinoxes the sun is at an angle of 90 deg. - your lattitude at local apparent noon.

   At the summer solstice, the sun is at the angle of the equinox + 23.45 degrees

   At the winter solstice, the sun is at an angle of the equinox - 23.45 deg.

   An example using MY latitude, which is 30 degrees N.

   equinox is 90 deg. - 30 deg. = 60 deg.

   Summer solstice 60 deg + 23.45 deg. = 83.45 deg.

   Winter solstice 60 deg. - 23.45 deg = 36.55 deg.

   So we want winter sun and little summer sun. I would try to make my awning long enough to block anything from 60 deg. and up

   So for a 36 inch tall window a little trig will get us to:

   Tan(equinox)=(window height) / (awning length)

   tan60 = 36 / (awning lgth.)

   1.554(awning lgth) = 36

   awning length = 36 / 1.554

   awning length = 23.2 inches

   Anyways, plug in your latitude and give it a shot. What I strongly suggest is to use figures like these to make a cardboard mock-up and try it out. I wouldn't order anything until you try it!

   Scott

2. 
   ml_ | Aug 29, 1999 07:29pm | #2

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   Can anyone tell me how to figure the optimum overhang for an eve, or placement for a new awning installation? For me, optimum means sunlight getting in the window in winter, but not in summer.

   (The windows in question face SSW in Los Angeles, if anyone out there has a chart or a computer program.)

   I know this information exists somewhere, but I have been unable to find it.

   Thanks for any help.