ASHRAE STD 55
Thermal Environmental Conditions for Human Occupancy
|Publication Date:||31 October 2017|
Addendum a adds a new method for the avoidance of the draft risk at the ankle region. Currently, the standard does not provide guidance for assessing ankle draft. The new method applies to occupants with clothing insulation less than 0.7 clo and metabolic rate less than 1.3 met, complying with the entire Section 5.3.4, "Local Thermal Discomfort."
This addendum uses mandatory language. Informative Appendix I is updated to take into account the new method, which is based on work described in the following sources:
Liu, S., S. Schiavon, A. Kabanshi, and W. Nazaroff. 2016. Predicted percentage of dissatisfied with ankle draft. Indoor Air 27(4):852-62. https://doi.org/10.1
Schiavon, S., D. Rim, W. Pasut, and W. Nazaroff. 2016. Sensation of draft at uncovered ankles for women exposed to displacement ventilation and underfloor air distribution systems. Building and Environment 96:228-36. http://dx.doi.org/10
Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and
strikethrough (for deletions) unless the instructions specifically mention some other means of indicating the changes.