Skip to main content
EERE » BTO » Building America » Solution Center Home » Image Gallery » Building energy codes often reference primary and secondary daylight when specifying daylighting control requirements – the primary daylight zone or distance into the room from the window equals the window height from the floor.

Building energy codes often reference primary and secondary daylight when specifying daylighting control requirements – the primary daylight zone or distance into the room from the window equals the window height from the floor.