01087nas a2200157   4500008004100000245004000041210004000081260001200121300001200133490000700145520063800152100002200790700001900812700002100831856007700852       2009                        eng d00aDaylight metrics and energy savings0 aDaylight metrics and energy savings  c09/2009  a261-2830 v413 a<p>The drive towards sustainable, low-energy buildings has increased the need for simple, yet accurate methods to evaluate whether a "daylit" building meets minimum standards for energy and human comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor of occupants comfort or interventions. This paper reviews the historical basis of current compliance methods for achieving daylit buildings, proposes a technical basis for development of better metrics, and provides two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.</p>1 aMardaljevic, John1 aHeschong, Lisa1 aLee, Eleanor, S.  uhttps://facades.lbl.gov/publications/daylight-metrics-and-energy-savings02657nas a2200265   4500008003900000245007100039210006900110260001200179520181700191653003502008653002802043653001602071653002202087653001902109100002102128700002702149700002202176700002202198700002202220700002202242700001402264700002102278700002402299856006802323       2005                          d00aDaylighting the New York Times Headquarters Building: Final Report0 aDaylighting the New York Times Headquarters Building Final Repor  c06/20053 a<p>The technical energy-savings potential for smart integrated window-daylighting systems is excellent and can yield significant reductions in US commercial building energy use if adopted by a significant percentage of the market. However, conventional automated shades and daylighting controls have been commercially available for over two decades with less than 1-2% market penetration in the US. As with all innovations, the problem with accelerating market adoption is one of decreasing risk. As the building owner researches technology options, the usual questions surface that concern the purchase of any new product: how will it work for my application, are the vendor claims valid, what risks are incurred, and will the performance benefits be sustained over the life of the installation? In their effort to create an environment that "enhances the way we work" in their new 139 km<sup>2</sup> (1.5 Mft<sup>2</sup>) headquarters building in downtown Manhattan, The New York Times employed a unique approach to create a competitive marketplace for daylighting systems. A monitored field test formed the strategic cornerstone for accelerating an industry response to the building owners' challenge to a sleepy market (i.e., US automated shading and daylighting control products have had few major technical advances over the past 10 years). Energy, control system, and environmental quality performance of commercially-available automated roller shade and daylighting control systems were evaluated. Procurement specifications were produced. Bids were received that met The Times cost-effective criteria. The Times will proceed with the use of these systems in their final building. Competitively-priced new products have been developed as a result of this research and are now available on the market.</p>10aautomated daylighting controls10aautomated window shades10adaylighting10aenergy-efficiency10avisual comfort1 aLee, Eleanor, S.1 aSelkowitz, Stephen, E.1 aHughes, Glenn, D.1 aClear, Robert, D.1 aWard, Gregory, J.1 aMardaljevic, John1 aLai, Judy1 aInanici, Mehlika1 aInkarojrit, Vorapat  uhttps://facades.lbl.gov/publications/daylighting-new-york-times