Tell me if this is common practice. Most of our facilities Air handlers, VAV boxes, and affilited controls are controlled through the Siemens Apogee software. For some reason,within the last few years as changes are made to our HVAC automation system, they are not staying with siemens. What we are ending up with is Air handlers being controlled by Apogee, and some of its affiliated VAV boxes being controlled by TAC VISTA. Two questions
Is this common, or acceptable, in the HVAC controls field?
What opinions do you controls techs have of TAC VISTA?