A tailored high-performance façade is particularly critical to the supertall Wanda Vista skyscraper under design in Chicago. The luxury residential building must minimize overall energy usage by balancing lighting, heating, and cooling demands, ensuring thermal and visual comfort, and preserving expansive panoramas of the neighboring lakefront and cityscape.
Wanda Vista’s façade is designed for premium aesthetics, comfort, and energy performance over the building’s dramatically varying height and multiple orientations via a combination of daylight analysis and energy modeling. dbHMS started with acceptable minimum glazing percentages and calculated optimization of the windows’ visible light transmittance and reflectivity using analysis metrics of daylight autonomy and point-in-time illuminance. This ensures that glare is prevented, introduces vibrant light deep within residential spaces throughout the year, and allows residents to keep their shades open and fixtures off while enjoying the view. Window solar heat gain coefficients vary as the floor plates change to optimize energy usage for the lowest annual operating cost, independent of final HVAC design.