An apparatus situated in a space for controlling an air terminal device to
affect at least one environmental condition in the space includes: (a) at
least one sensor unit for presenting at least one sensed indication
related with at least one respective environmental condition of the at
least one environmental condition; and (b) a local control unit coupled
with the air terminal device and coupled with at least one respective
sensor unit of the at least one sensor unit. The local control unit
responds to a relationship of at least one predetermined requirement with
the at least one sensed indication to effect the controlling.