Abstract: An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system utilizing an existing sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the existing sensor detecting the abnormal condition. Further included is an audio sensor, a wireless transmitter, a wireless receiver, programmable control circuitry, a switching transistor, a relay, and a power supply for all the previous elements, wherein these components utilize the first event marker signal and through a series of subsequent signals to result in the relay being operative to be in an activated operational state upon being energized by the switching transistor to operationally effectuate the selected response from the HVAC building system.

Abstract: An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system utilizing an existing sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the existing sensor detecting the abnormal condition. Further included is an audio sensor, a wireless transmitter, a wireless receiver, programable control circuitry, a switching transistor, a relay, and a power supply for all the previous elements, wherein these components utilize the first event marker signal and through a series of subsequent signals to result in the relay being operative to be in an activated operational state upon being energized by the switching transistor to operationally effectuate the selected response from the HVAC building system.

Abstract: An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system optionally including a sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the sensor detecting the abnormal condition. Further included is control circuitry in a first communication with the sensor, wherein the control circuitry is in a ready state that is operative to monitor for the first event marker signal, wherein the control circuitry outputs a second event marker signal corresponding to the first event marker signal, a relay in a second communication with the control circuitry, the relay is operative to be in an activated operational state upon receiving the second event marker signal to operationally effectuate the selected response from the HVAC building system.

Abstract: An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system optionally including a sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the sensor detecting the abnormal condition. Further included is control circuitry in a first communication with the sensor, wherein the control circuitry is in a ready state that is operative to monitor for the first event marker signal, wherein the control circuitry outputs a second event marker signal corresponding to the first event marker signal, a relay in a second communication with the control circuitry, the relay is operative to be in an activated operational state upon receiving the second event marker signal to operationally effectuate the selected response from the HVAC building system.