Electrochromic Window Demonstration at the 911 Federal Building, 911 Northeast 11th Avenue, Portland, Oregon
2016
Switchable electrochromic (EC) windows are part of a new class of dynamic, energy-efficient
technologies that enable real-time, active load management in response to weather conditions and
the unique operating conditions of individual buildings. Owners can now specify a solid-state
technology that reacts to various stimuli like the skin of a living entity. The technology can be
controlled to address multiple criteria to achieve a more optimal energy-efficient and comfortable
indoor environment than one with static or manually operated technologies. Inputs can include
data on outdoor solar conditions, utility rates, occupancy status, heating, ventilation, and air
conditioning (HVAC), or operating emergency or security mode. The outputs then dictate how the
EC window is controlled, whether as a self-contained autonomous unit that achieves specific zonal
objectives or as a part of an integrated system designed to address whole building, campus and gridrelated goals. Since windows typically have a 30-year life, these dynamic qualities enable the
building to be adaptable and more resilient as the environmental, operating and economic context
evolves.
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