Last month, this column addressed the fact that VAV terminal units are substantially more “variable” than even their name implies. Not only does the air flowing through them vary, there are a variety of control sequences that can be applied to them. This month, I want to address the long-term benefits to the owner of having a standard VAV terminal unit control sequence for their building or buildings.
As noted in April 2017, in the interests of energy conservation and occupant comfort, some building owners and operators have put a lot of effort into standardizing their terminal unit controls and want things done a very specific way. In addition to energy-conscious operations, the value of standardization cannot be overstated when the quantity of VAVs is in the scores, hundreds, or thousands for a single owner.