Page 72 - Zero Net Energy Case Study Buildings-Volume 2

CASE STUDY NO. 9
SPECULATIVE OFFICE BUILDING AT 435 INDIO WAY
(Above) View directly up into skylight aperture. (Photo cour- tesy of Integral Group.)
not be needed at any time under these conditions. The daylight studies showed, for example, that the glazing should be sloped at an angle perpendicular to the solar altitude at 12 noon at the equinox (March 21 and September 21). See the illustration above. (Diagram courtesty of Integral Group.)
The skylight structures are constructed of fiberglass and can be dropped into roof openings as required to get a generally even distribution of daylight across the floor below. Measurements taken under clear sky conditions showed a light level of 19 footcandles at 30” above the floor plane (workstation height). This is a good general lighting level and the expectation is that this light level would be augmented by local task lighting by the tenant, as needed at workstations.
Suspended light fixtures using LED light sources are placed farther apart than normal, with the idea that they simply replace the daylight levels when daylight is not available in a typical ambi- ent/task type of lighting design approach. The LED lights are dimmable in response to daylight availability and are additionally controlled by motion and infrared sensors.
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Zero Net Energy Case Study Buildings: Volume 2
PHOTO: BRUCE DAMONTE