Sun Angle Roof Overhang

Design solar altitude angle for full sun deg from passive solar altitude angle calculator build height of roof overhang from top of glass feet or leave blank build depth of roof overhang from glass feet or leave blank requested solution 0 full shade full sun 1 full shade 2 full sun.

Sun angle roof overhang.

Some shutters eaves trellises light shelves and awnings serve the same purpose as an overhang. Roof overhangs for summer shade and moisture protection. Borst engineering construction llc competence integrity and professionalism are integral to all that we do. Do not undervalue their importance.

Azimuth is measured in degrees clockwise from north. Types of roof or window overhangs for sunlight solar gain control overhangs may be solid louvered vegetation supporting or a combination of all of these aspects. Jonr senior member posts 5341. For example if the roof s overhang does not shade the window during the hottest hours of the day direct and reflected sun light will heat the interior.

From november through februrary the southern windows will receive full sun. Hot climates above 2 600 cooling degree days base 75 f 22 c. Az el both report dark after astronomical twilight. At noon on january 21 the glass is completely exposed.

Overhangs are a key part of any home s design. Using the calculator i m going to shoot for southern windows that are 4 tall and 2 below the lowest part of a 2 overhang. The size of the window width and height and the window s relationship to the roof the space above the window influences the direct and indirect gain of solar heat. You can use the free software sketchup to draw the house and it will draw sun shadows for any date time at your location.

With the window heights and overhangs i used in the model at noon on june 21 the entire glazing of the south elevation windows are completely in shadow but just barely. Cosine of solar zenith angle. Use the march 21 sun angle and locate the shadow. How do i determine the correct amount of shading sun.

Elevation is measured in degrees up from the horizon. I used sketchup to help determine how the solar path would fall on the house i am designing. Which should be noon if you are using a 24 hour time the sun angle is shown as negative and i have to go to around 10 pm 2200 hours to get the highest elevation angle. Purpose of use calculating soffit overhang to maximize passive solar house design bug report the time portion is confusing as when i enter 12.

24 dec 2012 02 45 pm. Also the time zones are not explained and one would think could be automatically. This will give me complete shade from may to august 24 shading in march 41 in september and less than 10 shading in october.