Methods, systems, and computer-readable mediums storing computer executable code for detecting and alerting of gases is provided. The method may include determining a parts per million of a specified gas. The method may also include comparing the determined parts per million to a pre-determined threshold. The method may include, when the parts per million meets or exceeds a threshold, generating a control signal. The method may also include transmitting the control signal to an alerting device to emit an alert to a user. The method may also include transmitting the control signal to a control device, wherein the control device performs a specified task.

Implementations are directed to a smart filter apparatus including an air filter, a sensor supported by the air filter and sensitive to a pathogen, and a control unit in data communication with the sensor and operable to perform operations including receiving, from the sensor, an indication of the pathogen present in air incident on the sensor, generating, by the control unit, a pathogen alert response, and providing, by the control unit, the pathogen alert response.

The present disclosure relates to a heating, ventilating, and air conditioning (HVAC) system that includes a refrigerant circuit and a sensor configured to measure a refrigerant concentration external to the refrigeration circuit. The HVAC system also includes a controller that is communicatively coupled to the sensor and to an economizer. The controller is configured to control a flow of environmental air into the HVAC system. The controller is further configured to increase a ratio of the flow of environmental air relative to a flow of return air from a conditioned interior space of a building when the sensor measures the refrigerant concentration above a predetermined threshold concentration.

Devices, methods, and systems for monitoring and/or assessing compliance with infectious disease guidance for reducing infectious disease transmissions are described herein. The systems may include sensing devices at or within a facility and computing devices to compare data based on outputs from the sensing devices with guidance and/or recommendations for mitigating infectious disease transmission. Various compliance parameters may be identified as being relevant to the guidelines and measurable with outputs from the sensing devices. Various compliance parameters may be identified as being relevant to the guidelines, but not measurable with outputs from the sensing devices. The compliance parameters may be individually scored or scored in groups, including the compliance parameters not measureable with outputs from the sensing devices, and a score relative to a facility or group of facilities may be provided. The scores may be presented to via a dashboard.

Described herein are methods and systems for decontaminating aircraft cabins and providing an indication to provide confidence that the cabins are safe for reentry post-operation. These methods and systems are based on reducing concentrations of infectious agents inside a cabin utilizing outside air and/or filtered air. In some examples, a method is performed after a certain contamination event (e.g., a sick person present on a flight and/or as a part of periodic service (e.g., in between flights. The amount of time the system is run to introduce compounds into the cabin is specifically calculated to lower the fraction of the remaining infectious agents below a certain desired level, thereby reducing the contamination concentration in the cabin from the initial concentration, The decontamination duration depends on the cabin volume and the incoming airflow rates. For example, the fraction of the remaining is brought below 5% after 9 minutes of flowing incoming air at 20 air changes per hour.

Methods and systems for maintaining an atmosphere inside a habitat enclosing a work station and shutting down one, more than one, or all operational equipment inside and/or outside the habitat upon the occurrence of an adverse event. Concentrations of explosive, flammable, and/or poisonous gases or vapors are sensed, transmitted to a logic device, as are temperature, pressure, and/or humidity. HVAC units and air extraction units controlled by the logic device maintain acceptable pressure, temperature, and/or humidity. Any grit and dust may be extracted. Any explosive, flammable, and/or poisonous gases or vapors are extracted employing an emergency gas extraction sub-system controlled by the logic device. The logic device shuts down one, more than one, or all operational equipment inside and/or outside the habitat (for example as dictated by the client, law, or regulation) upon receiving one or more adverse event signals.

A system includes one or more occupancy sensors, one or more environmental sensors and one or more controllable building components. A controller is configured to receive occupancy signals from the one or more occupancy sensors over a building network and to receive indoor air quality parameter signals from the one or more environmental sensors over the building network and to process the received signals to determine whether action is needed to improve one or more environmental conditions within at least some of the plurality of building spaces to reduce the likelihood of disease transmission among occupants of the building. Responsive to determining that action is needed, the controller is configured to provide control signals to one or more of the controllable building components over the building network to improve one or more environmental conditions within at least some of the plurality of building spaces.

A system for use with a conditioned space. The system includes an energy transfer device and at least one element. The energy transfer device transfers heat from a hotter air flow and a cooler air flow. The energy transfer device prevents the hotter air flow from mixing with the cooler air flow. A supply one of the hotter and cooler air flows enters into the conditioned space and a return one of the hotter and cooler air flows exits from the conditioned space. The element(s) heat or cool the supply air flow before the supply air flow reaches the conditioned space.

Systems and methods for integrating a building management system communicatively coupled to a security subsystem via a communication network, in which the building management system determines occupancy data, with a heating, ventilation, and air conditioning subsystem that includes a scrubber unit communicatively coupled to the building management system via the communication network. The scrubber unit includes a contaminant filter that sorbs air contaminants from a surrounding environment when an elevated pressure differential is introduced across the contaminant filter; an inlet sensor that determines sensor data indicative of contaminant level present in return air received by the scrubber unit from an internal portion of the building; and scrubber control circuitry that selectively instructs the scrubber unit to operate in one of multiple regeneration modes based at least in part on the occupancy data and the sensor data to facilitate improving filtering efficiency provided by the contaminant filter during subsequent operation.

Indoor shooting range comprising an interior space for firing ammunition, said indoor shooting range comprising: —an air ventilation system arranged for providing said interior space with fresh air; —a detector unit arranged for detecting a concentration of metallic elements, in said interior space, originating from ammunition fired in said interior space of said indoor shooting range; —a control unit, communicatively coupled to said air ventilation system and said detector unit, for controlling said air ventilation system taking into account a detected concentration, by said detector unit, of metallic elements originating from said ammunition fired in said interior space for maintaining said concentration of said metallic particles in said interior space below a predetermined value.