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This presentation provides a high level summary of the Daylighting Analysis including Glare Evaluation and climate based metrics (Daylight Autonomy -DA - and Utilization of Daylight Index - UDI) of Electrochromic switchable glazing compared to conventional static glazing for the atrium roof in a ten story Office Building.in South Korea. These analysis were performed using a detailed model constructed in Rhino and using Diva, a plugin for Rhino developed by Christoff Reinhart, Alstan Jekubiac and Jeffrey Neimasz at the Harvard School of Architecture. The annual daylighting performance utilyzes the unique dynamic shading modeling capability in DIVA which works in conjunction with Radiance, a program developed by the Biulding Technology Group at LBNL and by Greg Ward. DIVA is marketed by Solemma (see www.diva4rhino.com). Electrochromic glazing modeled as per the manufacturer's specifications - Sage Electrochroimics, Inc.