In an example, an air filter system includes an air filter and a thermally conductive particulate sensor (TCPS). The TCPS includes a temperature sensor to measure a first temperature of the TCPS at a first time, measure a second temperature of the TCPS at a second time, and provide the measured first temperature and the measured second temperature to a controller. The controller to determine an actual rate of temperature change based on the measured first temperature and the measured second temperature, compare the actual rate of temperature change to a target rate of temperature change, and provide a notification when a difference between the actual rate of temperature change and the target rate of temperature change is greater than an accumulation threshold indicative of a threshold amount of particulate accumulation on the TCPS.

A gasoline particulate filter (GPF) diagnostic technique utilizes an upstream temperature sensor arranged at an upstream point relative to a GPF brick that the GPF is configured to house and configured to measure an upstream temperature of exhaust gas produced by an engine, a downstream temperature sensor arranged at a downstream point relative to the GPF brick and configured to measure a downstream temperature of the exhaust gas produced by the engine, and a controller configured to detect whether the GPF brick is damaged or missing based on a temperature difference between the upstream and downstream exhaust gas temperatures, a set of temperature thresholds, and a current operational mode of the engine.

The present disclosure relates generally to air intake filter assemblies, and more particularly to air intake assemblies for an outdoor portion of a heating, ventilation, and/or air conditioning (HVAC) system. In an embodiment, a filter assembly is configured to filter an airflow entering an air intake of a HVAC unit. The filter assembly includes a first layer of a first coarse mesh, a second layer of a second coarse mesh, and a fine filter disposed between the first layer and the second layer. Additionally, the fine filter includes an upper level and a lower level with respect to the airflow, and wherein the lower level facilitates accumulation of fine debris captured from the airflow entering the air intake of the HVAC unit.

An indoor air quality (IAQ) control system for a heating, ventilation, air conditioning, and Refrigeration (HVACR) system including an IAQ monitor that collects air quality data from an air quality sensor of an air quality-controlled space; a controller that manages a remediation device of the air quality-controlled space; and an IAQ management server that generates a biological pollutant estimate based on the air quality data using an algorithm that correlates the air quality data to the biological pollutant estimate, and generates a remediation recommendation. Additionally, a control method includes collecting air quality data from an air quality sensor of an air quality-controlled space using an IAQ monitor; managing a remediation device of the air quality-controlled space using a controller; generating a biological pollutant estimate based on the air quality data using an algorithm that correlates the air quality data to the biological pollutant estimate; and generating a remediation recommendation.

A container includes a container body and an air processing system. The container body includes a plurality of walls defining an interior space for receiving wafers. The air processing system is attached to the container body. The air processing system includes an exchange module, an air extraction module, a first contaminant removal module, a processing module, a second contaminant removal module, a controller module and a power module. The exchange module is coupled to one of the walls of the container body. The air extraction module extracts air from the container body. The first contaminant removal module is coupled to the air extraction module and the exchange module. The processing module is coupled to the air extraction module. The second contaminant removal module is coupled to the processing module and the exchange module. The controller module is configured to turn the air extraction module on and off.

Methods and systems are provided for monitoring a change in exhaust particulate filter (PF) soot load during an engine non-combusting condition. In one example, a method may include, responsive to a higher than threshold PF temperature immediately prior to an engine shutdown, estimating a rate of soot burn when the engine is no longer combusting, and estimating a soot load on the PF during and at an onset of immediately subsequent engine start based in part on the rate of soot burn.

A fresh air ventilation device for air pollution prevention includes a main body, a blower, a filtering and cleaning assembly, and a gas detection module. The blower is disposed in the main body to guide air convection and form a flow-guiding path. The filtering and cleaning assembly is disposed in the flow-guiding path to filter and clean an air pollution source in the air convection guided by the blower. The gas detection module is disposed in the flow-guiding path of the main body to detect the air pollution source and transmit a gas detection data.

The present disclosure relates generally to air intake filter assemblies, and more particularly to air intake assemblies for an outdoor portion of a heating, ventilation, and/or air conditioning (HVAC) system. In an embodiment, a filter assembly is configured to filter an airflow entering an air intake of a HVAC unit. The filter assembly includes a support structure and a plurality of filter slats, each having a fine filtration material, each disposed within the support structure, and wherein the plurality of filter slats is configured in a louvered relationship and actuated between a closed configuration through which the airflow passes and an open configuration through which the airflow passes.

The present application is directed to an environmental control system for an agricultural animal housing facility. This system includes a plurality of air handling systems configured to deliver supply air to an agricultural animal housing facility, wherein each air handling system is configured to receive a portion of fresh air and a portion of recirculated internal air, and wherein each air handling system is configured to mix the fresh air and internal air and provide the resultant mixture to the agricultural animal housing facility as supply air. The plurality of air handling systems are configured to regulate a proportion of fresh air to internal air in response to an internal temperature of the agricultural animal housing facility.

A system for protecting a workspace from airborne contaminants comprises at least one sensing capturing unit, an air transmission unit, an air capturing unit, and a processor. The processor is configured to receive a sensing data associated with the workspace from the at least one sensing capturing unit and determine presence of at least one source of transmission of the airborne contaminants. The processor is further configured to configure a capture zone within the workspace based on the determined at least one source of transmission of the airborne contaminants. The processor is configured to control the air transmission unit to direct a unidirectional flow of air over the configured capture zone, thereby directing movement of the airborne contaminants in the capture zone and further to control the air capturing unit to capture the unidirectional flow of air, along with the airborne contaminants, directed from the air transmission unit.