In climates with high temperatures, a curtain wall must maintain what U-Factor?

In climates with high temperatures, a curtain wall must maintain a U-Factor of 0.6 to ensure energy efficiency and comfort within the building. The U-Factor measures the rate of heat transfer through a building component; a lower U-Factor indicates better insulating properties.

In hot climates, it is essential to minimize heat gain through the building envelope to maintain indoor temperatures and reduce cooling energy consumption. A U-Factor of 0.6 is representative of materials that effectively limit the transfer of thermal energy, thereby contributing to a more energy-efficient design suitable for reducing air conditioning loads and enhancing occupant comfort.

The other options reflect more stringent limitations that might be required in colder climates or more advanced insulating materials but are not appropriate for high-temperature settings where the goal is to minimize heat gain rather than retain heat.