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.