Abstract: A heating ventilation and air conditioning (HVAC) system includes an air handling unit having an outlet, at least one zone operably coupled to the outlet of the air handling unit; and at least one indoor air quality sensor operable to monitor a level of one or more contaminants. The at least one indoor air quality sensor is arranged within the at least one zone. A controller operably coupled to the at least one indoor air quality sensor and is configured to determine when an amount of the one or more contaminants within the at least one zone exceeds an allowable threshold and implement a multi-level ventilation strategy to reduce the amount of the one or more contaminants within the at least one zone to below the allowable threshold.

Abstract: A heating ventilation and air conditioning (HVAC) system includes an air handling unit having an outlet, at least one zone operably coupled to the outlet of the air handling unit, and at least one indoor air quality sensor operable to monitor an amount of one or more contaminants. The at least one indoor air quality sensor is arranged within the at least one zone. A controller operably coupled to the at least one indoor air quality sensor is configured to detect the occurrence of a fault or an unsatisfied indoor air quality condition and perform diagnostics to determine the cause of the fault or the unsatisfied indoor air quality condition.

Abstract: An elevator system (20) uses destination entry dispatching techniques. A passenger interface device (22) operates in a first mode to allow passengers (24) to enter destination requests for elevator service. The passenger interface (22) operates in a second mode to provide at least one additional feature to an authorized individual. The additional feature may be at least one of a service-related function, a security-related function, a monitoring-related function or a communication-related function.

Abstract: An elevator system (20) uses destination entry dispatching techniques. A passenger interface device (22) operates in a first mode to allow passengers (24) to enter destination requests for elevator service. The passenger interface (22) operates in a second mode to provide at least one additional feature to an authorized individual. The additional feature may be at least one of a service-related function, a security-related function, a monitoring-related function or a communication-related function. Various such features are disclosed.

Abstract: A position reference system for use with a conveyance, such as an elevator (12). The system includes a code affixed to or embedded within a suspension device or primary motion coupling such as a rope or coated steel belt (16). A reader (28) in a fixed location determines the position of the conveyance.