For the building envelope, the following factors were considered:
- Triple Low-E glass for all the windows in the building.
- Around 40% to 50% of WWR in the western and eastern sides of the building with 1/2 Win height.
- Most of the illumination will come from the southern side of the building. giving it 80% of WWR with no shading.
- The north side only needs one window for the room, occupying no more than 15% of the wall area.
- As for the wall and roof, the R38 materials were enough to reduce the EUI considerably.
With these considerations, the mean EUI of the building goes down to 52.1 kBtu / ft2 / yr.
By taking advantage of the lighting and plug load efficiency, plus daylighting and occupancy control, the building can lower almost 20 units more of EUI.
By adding photovoltaic features to the building, this can get as low as 9.29 in EUI, almost complying to the Arch 2030 Challenge. The EUI for the payback limit does not vary much between 20 to 30 years.