Apparatus and method for environmentally conditioning a space

1. A local control apparatus, comprising:

at least one condition sensor unit, each configured to sense an extant condition of a selected space corresponding to an air terminal device, said selected space coupled to an air duct from one of a plurality of air conditioning units, said at least one condition sensor unit configured to indicate said extant condition of said selected space; and

a local control unit coupled to a corresponding said air terminal device and coupled via a second network to a master control unit which is coupled via a first network to said plurality of air conditioning units, said local control unit configured to control at least one function of said corresponding said air terminal device based on said indication of said extant condition of said selected space and said master control unit configured to control at least one other function of said corresponding said air terminal device.

2. The local control apparatus as recited in claim 1 wherein the local control unit controls said air terminal device according to a predetermined relation between a predetermined value and said extant condition.

3. The location control apparatus as recited in claim 2 wherein a user interface permits a user to vary said predetermined relation and said predetermined value.

4. The location control apparatus as recited in claim 3 wherein a display unit cooperates with said user interface to permit said user to vary said predetermined relation and said predetermined value.

5. The location control apparatus as recited in claim 1 wherein said extant condition is selected from the group consisting of temperature, relative humidity, carbon dioxide level, and motion.

6. A method, comprising:

sensing, by a condition sensing unit of a local control apparatus, at least one extant condition in a selected space;

indicating, by said condition sensing unit, said at least one extant condition in said selected space;

controlling, by a local control unit of said local control apparatus, at least one function of an air terminal device based on said at least one extant condition; and

controlling, by a master control unit coupled to both said local control apparatus via a second network and a plurality of air conditioning units via a first network, at least one other function of said air terminal device, said air terminal device configured to condition said selected space in cooperation with said plurality of air conditioning units.

7. The method as recited in claim 6 further comprising controlling, by said local control unit, said at least one function of said air terminal device according to a predetermined relation between a predetermined value and said extant condition.

8. The method as recited in claim 7 wherein a user varies, with a user interface of said local control apparatus, said predetermined relation and said predetermined value.

9. The method as recited in claim 8 further comprising displaying, with a display unit of said local control apparatus, said predetermined relation, said predetermined value, and said at least one extant condition.

10. The method as recited in claim 6 wherein said at least one extant condition is selected from the group consisting of temperature, relative humidity, carbon dioxide level, and motion.

11. An environmental control system, comprising:

a plurality of air conditioning units, each coupled to an air duct for distributing conditioned air among selected spaces;

a master control unit coupled via a first network to said plurality of air conditioning units;

a plurality of air terminal devices, each serving a corresponding one of said selected spaces and coupled via a second network to said master control unit wherein said master control unit controls some functions of said plurality of air terminal devices; and

a plurality of local control apparatuses, each associated with said corresponding one of said selected spaces and with a corresponding one of said plurality of air terminal devices and each coupled to said master control unit via said second network wherein said each of said local control apparatuses controls other functions of said corresponding one of said plurality of air terminal devices, each of said plurality of local control apparatuses including:

at least one condition sensor unit, each configured to sense a condition of said corresponding one of said selected spaces and configured to indicate an extant condition of said corresponding one of said selected spaces; and

a local control unit coupled to said corresponding one of said plurality of air terminal devices and coupled via said second network to said master control unit, said local control unit configured to control at least one of said other functions of said corresponding one of said plurality of air terminal devices based on said indication of said extant condition of said corresponding one of said selected spaces in cooperation with said master control unit.

12. The environmental control system as recited in claim 11 wherein the local control unit controls said air terminal device according to a predetermined relation between a predetermined value and said extant condition.

13. The environmental control system as recited in claim 12 wherein a user interface permits a user to vary said predetermined relation and said predetermined value.

14. The location control apparatus as recited in claim 13 wherein a display unit cooperates with said user interface to permit said user to vary said predetermined relation and said predetermined value.

15. The location control apparatus as recited in claim 11 wherein said extant condition is selected from the group consisting of temperature, relative humidity, carbon dioxide level, and motion.