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Clarified side-lighting requirements and associated exceptions.Updated daylight responsive requirements, added definition for “continuous dimming” based on NEMA LSD-64-2014.Updated lighting control requirements for parking garages to account for the use of LEDs.New simplified method for lighting for contractors and designers of renovated office buildings and retail buildings up to 25,000 ft2 (2300 m2).Modified lighting power allowances for Space-by-Space Method and the Building Area Method Learning Objectives - P id an overview of ASHRAE Standard 90.1, including history, Provide i f St d d 90 1 i l di hi t scope, and process for maintaining the standards - Describe the energy savings comparison of 90.1-2010 to 90.1-2004 - Discuss approved changes to 90.1-2010 - Describe future improvements for 90.Refined exceptions related to vestibules, added new option and associated criteria for using air curtains.Revised air leakage section to clarify compliance Front page of the ASHRAE 90.1 2016 Design Guide from Wattstopper with sitting area showcased.Upgraded minimum criteria for SHGC and U-factor across all climate zones.Combined categories of “nonmetal framed” and “metal framed” products for vertical fenestration.New commissioning requirements in accordance with ASHRAE/IES Standard 202.
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Significant changes to requirements include the following
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The 2019 edition includes various modifications and clarifications to improve internal consistency and to standardize the structure and language of the document. It is an indispensable reference for engineers and other professionals involved in design of buildings and building systems. BSR/ASHRAE/IES Addendum ac to ANSI/ASHRAE/IES Standard 90. It offers, in detail, the minimum energy efficiency requirements for design and construction of new buildings and their systems, new portions of buildings and their systems, and new systems and equipment in existing buildings, as well as criteria for determining compliance with these requirements. ASHRAE/IES Standard 90. ASHRAE Standard 90.1 Version Metal Roof R-Value Metal Above-Grade Wall R-Value Above-Grade Wood Frame Wall R-Value 90.1-2007 19 13 13 90. This standard provides the minimum requirements for energy-efficient design of most buildings, except low-rise residential buildings. Standard 90.1 has been a benchmark for commercial building energy codes in the United States and a key basis for codes and standards around the world for more than 35 years.