Once the outside air has been read and the assumed potential critical zones have been identified, if a building owner/staff is unable to compile the mechancial as-builts in order to determine max (Vdzd) and min (used to determine Ds), is it acceptable to trend those spaces through the building DDC system for a certain period of time in order to determine those values? Any further advice? Thanks in advance.
You rely on LEEDuser. Can we rely on you?
LEEDuser is supported by our premium members, not by advertisers.
Go premium for
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
June 4, 2012 - 1:55 pm
Roger,
Many times the Max and Min values for a terminal unit are listed as adjustable points in the DDC system. Check there first. Unfortunately, unless you are trending during peak indoor and outdoor conditions and you may not see your maximum flow at your critical zone during a short trending period. Minimums will probably occur more often and would be caught in a trending period of a day or so.