Ambient Properties
The ambient data available under the Definitions branch come from the processing of measured data from ASHRAE Weather Data Viewer 5.0 (©2013 ASHRAE, www.ashrae.org. Used with permission.), ASHRAE Weather Data Viewer 6.0 (©2017 ASHRAE, www.ashrae.org. Used with permission.), and Weather Data Viewer 2021 (©2021 ASHRAE, www.ashrae.org. Used with permission.) given as frequencies of observations, monthly and hourly averaged for several past years of observation. They provide time-dependent weather conditions for about 8500 stations worldwide in terms of the dry bulb temperature, the dew-point temperature, the relative humidity, the wind speed, the absolute pressure, the precipitation rate, and the solar direct and diffuse irradiance.
In this section:
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Settings for the Ambient Properties
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Processing of ASHRAE Data
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Ambient Data Interpolation
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Ambient Variables and Conditions
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Use of Ambient Data From the Features
When no special mention is added, the term temperature stands for the dry bulb temperature. See Moist Air Variables for the definition of the dry bulb temperature, dew point temperature, and relative humidity.