Import 3D Freeform Model
Design 3D Model
Design 3D Window Shading
Design 2D Horizontal Overhang
Design 2D Vertical Fin

HelpDesign 2D Horizontal Overhang

Design horizontal overhang window shading:

The model shows a window and horizontal overhang in section view. The yellow lines indicate the direction of sunlight. Also shown is a diagram that indicates orientation of the window and position of the sun.

  • Drag on the red nodes to change model dimensions.
     
  • Orientation relates to the angle of the structure relative to North in the sense NESW. Thus, North is zero degrees, East is 90 degrees.
     
  • The first time you run the animation, from the Date & Location dialog, specify Date, Latitude and Longitude.
     
  • To change the speed of the animation, modify Time Interval in minutes.
     
  • Using the Camera Controls, you may change camera position and zoom level. Click on the Reset button to reset the camera to its default position.

The Blue and Green Arrows:

The blue and green arrows are there to help you design the most efficient solar shading device. In temperate climates, it is desirable to design a shade so that the window is fully shaded in the summer to minimise heat loading, and fully exposed in the winter to maximise heat gain.

The blue arrow indicates the direction of sunlight at solar noon, two months either side of the winter solstice. The green arrow indicates the direction of sunlight at solar noon, two months either side of the summer solstice.

To design the shade, modify the position and size of the overhang so that the blue arrow points at the front of the window head, and the green arrow points at the rear of the window sill. This will ensure that the strongest sunlight is blocked during the summer months, and admitted during the winter months. Start the animation to validate your design.

Abbreviations:

O/hang Length Overhang Length
The horizontal projection of the overhang measured from the building façade.
O/hang V. Offset Overhang Vertical Offset
The vertical position of the overhang measured from the window head.
O/hang H. Offset Overhang Horizontal Offset
The required additional horizontal projection of the overhang measured from the side of the window that gives the indicated shading.
Mag. Var. Magnetic Variation
D. Saving Daylight Saving