I have a customer that is using an AMX system with 19 thermostats on it, but he is using the Aprilaire communicating stats with the AMX whole house automation. I do know that AMX is one of the top companys in what they do.
Poor planning on your part doesnt necessarily constitute an emergency on my part.
Interesting to know...I also have a new customer with 9 units with the Aprilaire communication panel. They want me to monitor it for them online, honestly I've never benn asked to provide this service before