Interpretation Requests (IR) are requests to the BACnet committee (SSPC) to better explain what is meant by certain wording in the standard. These requests for official interpretations can be for Standards 135, the original BACnet Standard as well as 135.1, the BACnet Companion Standard (Testing). An “Interpretation” is “The written explanation of the meaning of specific provisions of a standard or guideline, as determined by the IC [Interpretations Committee] or the PC [Project Committee, i.e., SSPC 135] in response to an IR.”
Below are links to the ASHRAE website that contain all the interpretations to Standards 135 and 135.1 and all associated addenda.
Interpretations to ASHRAE 135 – The BACnet Standard
Interpretations of ASHRAE 135-2020
Interpretations of ASHRAE 135-2016
Interpretations of ASHRAE 135-2012
Interpretations of ASHRAE 135-2010
Interpretations of ASHRAE 135-2008
Interpretations of ASHRAE 135-2004
Interpretations of ASHRAE 135-2001