Which shading device serves well toward the near east and near west orientation?

Which shading device serves well toward the near east and near west orientation?

• A. Louvers parallel to the wall (Horizontal types)
• B. Vertical type of Sun Shading device
• C. Eggcrate types sun shading device
• D. Damp

Answer: (B)

Shading on east and west facades must block the sun when it comes from the sides, especially in the morning and evening when it is at low angles. Vertical shading devices are best for this orientation because their slats run north–south, intercepting those sideward rays effectively while still letting daylight in and supporting air flow. Horizontal louvers are great for reducing heat from the high midday sun on southern facades but don’t stop the low-angle sun from the east or west as efficiently, so glare and heat can still enter. An eggcrate system diffuses light but isn’t as effective at intercepting the low-angle sun from the sides as vertical louvers are. Damp isn’t a shading device and wouldn’t address this orientation condition.

Shading on east and west facades must block the sun when it comes from the sides, especially in the morning and evening when it is at low angles. Vertical shading devices are best for this orientation because their slats run north–south, intercepting those sideward rays effectively while still letting daylight in and supporting air flow. Horizontal louvers are great for reducing heat from the high midday sun on southern facades but don’t stop the low-angle sun from the east or west as efficiently, so glare and heat can still enter. An eggcrate system diffuses light but isn’t as effective at intercepting the low-angle sun from the sides as vertical louvers are. Damp isn’t a shading device and wouldn’t address this orientation condition.