I am finding it amusing that so many controls companies simply dismiss our fan coil units. There off hand anything you can do we can do better, is very amusing.

A particularly customers controls company advised me, he had been in "the game" for some 17 years and could knock anything we can do out in 30 Minutes.. I watched there "demonstration" with interest after they had two months to write the 30  minute strategy... Which barley worked...

I think the bottom line is, leave it to the experts.. If you want a controller that suits your fan coil units, it's best left to the fan coil unit manufacturer.