www.opsisarch.com The unique winter garden creates a year-round tempered gathering space. This space is warmed in the winter by sunlight, while a portion of the return air ordinarily exhausted to the exterior from the conditioned classrooms at the perimeter is harnessed to provide the space with partially conditioned air without consuming additional energy. Passive ventilation and carefully oriented glazing keeps summer temperatures within a few degrees of ambient. technology classroom building portland community college portland, oregon a case study in sustainable design Sustainable Sites • The building footprint is sculpted to preserve a grove of fi r and deciduous trees while reinforcing the occupants’ connection to the natural environment. • The unique organization of

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