Shading Device Sizer

Location

Latitude ° Longitude °

UTC offset (hours) Window faces

Design date Fine-tune wall °

Shade from Shade until

Window height mm Window width mm

Overhang above window head (mm)

The tool sizes a horizontal overhang to shade the whole window height, and vertical fins to shade the whole width when the sun is at least 20° off the wall's facing direction, for every hour in your window of time on that date. Pick the hottest month you care about.

Overhang depth–

Fin depth (oblique sun)–

Worst hour–

Sun on wall–

Section overhang vs. worst sun ray

Plan fins vs. sun direction

Hour by hour

Time	Altitude	Azimuth	HSA	VSA	Overhang (mm)	Fin (mm)

HSA is the sun's angle from the window's facing direction in plan. VSA is the profile angle in section. A deep overhang at low VSA (east and west walls) usually means vertical fins or louvres work better.