Shading Devices for Energy Efficiency

GENERAL TYPES OF SHADING DEVICES:

The basic types of exterior shading devices can be identified as HORIZONTAL, VERTICAL OR EGGCRATE.

Horizontal shading devices are suited to southern exposures. Roof overhangs can also easily be used to shade southern exposures on low rise buildings. This is perhaps the most economical and potentially aesthetically pleasing solution for building applications.

Basic Typology of Horizontal Shading Devices for Southern Exposures

Where sun is hitting the facade from a south-easterly or south-westerly direction, vertical devices can effectively block the sun. Eggcrates are often used on non true south facing elevations as well.

Shading Devices for Non Southern Exposures

The general configuration of the building can also be modified to alter the orientation of windows for heat avoidance.

Various Planimetric Configurations of Non South Facing Shading Devices

For reasons of both heat avoidance and economy, it is often best to "gang" the south facing shading devices. In order to obtain shading in the late morning and early afternoon when the sun is not at its high point, the shading device should be extended either side of the window opening.

Elevation of Shading Device Configurations for South Facing Facades