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A post-occupancy evaluation was made of two energy-efficient office buildings four years after initial occupancy. Building operators, owners, engineers and architects were interviewed to understand how decisions were made that ultimately affected the energy performance of the two buildings. Tenants were surveyed to assess their satisfaction with their work environment. Findings from the study have shown how different goals and expectations on the part of the principal players led to decisions that have influenced major aspects of the buildings' performance. Interior designers and tenants have negated the energy-saving potential of the daylighting, marketing staff have altered the window characteristics, building operators have operated the building on schedules different from those envisioned by the designers, and building code officials have restricted tenant use of the atria. While many of the findings are specific to these two buildings, the general findings are applicable to office buildings in general, specifically that the operation and use of the building are often more important than the design in determining the overall performance.
office buildings, energy-efficient design, daylighting, occupant effects, operation and maintenance, post-occupancy evaluation
Staff Scientist, Lawrence Berkeley Laboratory, Berkeley, California