ANSI/ASHRAE Standard 55-2013, Thermal Environmental Conditions for Human Occupancy, specifies conditions for acceptable thermal environments and is intended for use in design, operation, and commissioning of buildings and other occupied spaces. The 2013 edition of ANSI/ASHRAE Standard 55 incorporates 18 published addenda to the 2010 edition, and provides two compliance methods: a graphic method for simple situations and an analytical method for more general cases. Analytical calculations can be easily performed using the ASHRAE Thermal Comfort Tool software available from the ASHRAE Bookstore.
Since 2010, Standard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language. Requirements are now clearly stated and calculation procedures appear sequentially.
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