A box assembly includes a box, a door, an opener, and an insulation material. The box is configured to be installed on a curtain wall. The door encloses an interior space of the box. The opener is configured to open the door. The insulation material is in a compressed state in the interior space when the door is closed. The insulation material is configured to transition to an uncompressed state when the opener opens the door. When the door is opened, the insulation material at least partially extends from the interior space into a safing slot adjacent the curtain wall when the box is in an installed state and the door is opened.