Fire detectors with environmental data input

1. A method comprising:

providing a fire detector having a plurality of environmental monitoring devices disposed in an ambient airflow proximate the fire detector;

acquiring a plurality of parameters indicative of the physical characteristics of a region; and

providing the parameters as inputs to an alarm condition detection process, and, responsive thereto, adjusting sensitivities of at least some of the environmental monitoring devices; and

sensing, automatically, an ambient condition of the region proximate the fire detector by at least one of the plurality of environmental monitoring devices of the fire detector and providing indicia indicative of the conditions as inputs to the alarm condition detection process, and, responsive thereto, adjusting a sensitivity of at least one other of the environmental monitoring devices of the fire detector.

2. A method as in claim 1 where acquiring includes acquiring regional floor plan information.

3. A method as in claim 1 where acquiring parameters includes acquiring at least some of, expected temperature in at least one portion of the region, indicia indicative of expected air flow in at least parts of the region, indicia indicative of space adjacent to an outside wall, indicia indicative of natural light in at least one part of the region, indicia of fuel load in the region, type of occupancy associated with the region, expected use of one or more portions of the region, or, indicia indicative of characteristics of environmental control of the region.

4. A method as in claim 1 where automatically sensing includes at least some of sensing air flow, sensing temperature at one or more locations in the region, sensing temperature differences at various heights in the region, sensing occupancy levels in the region, sensing dust levels in the region, sensing a gas level in the region, sensing levels of visible light in the region, sensing humidity levels in the region, sensing sound levels in the region, or, sensing usage of selected utility usage in the region.

5. A method as in claim 1 where adjusting includes adjusting alarm decision processing of a plurality of detectors installed in the region.

6. A method comprising:

providing a fire detector having a plurality of environmental monitoring devices disposed in an ambient airflow proximate the fire detector;

sensing, automatically, an ambient condition of a region proximate the fire detector at least partially via one of the plurality of environmental monitoring devices of the fire detector; and

providing the indicia indicative of the conditions as inputs to an alarm condition detection process, and, responsive thereto, automatically adjusting a sensitivity of at least one other of the environmental monitoring devices of the fire detector.

7. A method as in claim 6 which includes acquiring a plurality of parameters indicative of the physical characteristics of the region.

8. A method as in claim 7 where acquiring parameters includes acquiring at least some of, expected temperature in at least one portion of the region, indicia indicative of expected air flow in at least parts of the region, indicia indicative of space adjacent to an outside wall, indicia indicative of natural light in at least one part of the region, indicia of fuel load in the region, type of occupancy associated with the region, expected use of one or more portions of the region, or, indicia indicative of characteristics of environmental control of the region.

9. A method as in claim 8 where automatically sensing includes at least some of sensing air flow, sensing temperature at one or more locations in the region, sensing temperature differences at various heights in the region, sensing occupancy levels in the region, sensing dust levels in the region, sensing a gas level in the region, sensing levels of visible light in the region, sensing humidity levels in the region, sensing sound levels in the region, sensing ambient air velocities at various locations in the region, or, sensing usage of selected utility usage in the region.

10. A method as in claim 9 where adjusting includes adjusting alarm decision processing of a plurality of detectors installed in the region.

11. A system comprising:

a fire sensor;

a plurality of ambient condition detectors located within the fire sensor and exposed to an ambient airflow proximate the detector; and

control circuitry coupled to the fire sensor, the circuitry responding to at least some of manually entered regional parameters and automatically acquired parameters indicative of selected regional ambient conditions the automatically acquired parameters sensed by at least one of the plurality of ambient condition detectors and including software to adjust a sensitivity of at least one other of the environmental monitoring detectors of the fire detector in response thereto.

12. A system as in claim 11 where at least some of the detectors include flow circuitry that senses an ambient air flow rate.

13. A system as in claim 12 where the flow circuitry includes additional circuitry, responsive to a senses flow rate that generates an indicium indicative thereof.

14. A system as in claim 13 where the flow circuitry includes interface circuitry to couple the indicium to the control circuits.

15. A system as in claim 12 where the ambient condition detectors are coupled to the control circuitry by at least one of a wire or wireless medium and where the indicium is transmitted via the medium.

16. A system as in claim 12 wherein the fire sensor further comprises a housing, a smoke sensing chamber in the housing, at least one flow rate sensor of ambient air flow with local control circuits coupled thereto as well as local interface circuits to transmit flow rate indicating indicia to the control circuitry.