A wall mountable sensor module includes a housing defining an internal space that is segmented into a first internal space and a second internal space. The first internal space defines an air channel that extends from an air inlet to an air outlet. Two or more sensors are configured to be exposed to the air flow channel. A first sensor is configured to detect a first air parameter and a second sensor is configured to detect a second different air parameter, wherein the second sensor is situated downstream of the first sensor in the air flow channel. The sensor module includes a fan housed by the housing, the fan configured to cause an airflow to flow in through the air inlet, through the air flow channel thereby exposing each of the sensors to the airflow, and out through the air outlet.

A heating, ventilation, and air conditioning (HVAC) system includes an air handling unit, a supply airflow damper to direct a supply airflow from the air handling unit to a conditioned space, and one or more filters selectively deployable across a flowpath of the air handling unit to remove one or more contaminants from the supply airflow prior to the supply airflow passing through the supply airflow damper. A control system is operably connected to the one or more filters to direct movement of the one or more filters between a deployed position and a stowed position.

An air purifier for preventing air pollution is disclosed and includes a main body, a gas guider, a filtration and purification component and at least one gas detection module. The main body is configured to form a diversion path. The gas guider is disposed in the diversion path for guiding an air convection. The filtration and purification component is disposed in the diversion path for filtering and purifying an air pollution source contained in the air convection guided by the gas guider. The at least one gas detection module is disposed in the diversion path for detecting the air pollution source and transmitting a gas detection datum.

An apparatus for removing particulate matter from an enclosure having an internal space and an opening into the internal space, includes a cover positionable adjacent the opening so that the cover covers the opening, a gas source external to the internal space, an inlet conduit that in use extends through the cover and is adapted to direct gas from the gas source to at least one gas outlet within the internal space, a source of partial vacuum to maintain a partial vacuum within the enclosed space and to draw gas and particulate matter entrained therein from the internal space firstly through an outlet conduit and then through a particulate matter separation means comprising at least one filter, a sensor for sensing concentration of particulate matter in gas leaving the enclosed space, and a display adapted to provide to a user information on concentration of particulate matter leaving the internal space.

A method for indicating to a user the expected time for an air purifier to achieve a target level of pollution in a room by: (A) acquiring the current level of pollution (CP) in said room; (B) acquiring current air flow speed (CAFS) through said air purifier; (C) comparing the current level of pollution (CP) with a pre-determined target level of pollution (IP); (D) calculating the expected time (T) required to reduce current pollution (CP) to said target level of pollution (IP) at current air flow speed (CAFS); (E) indicating said expected time (T) required to reduce current pollution to said target level of pollution at current air flow speed to a user; and (F) repeating steps (A) to (E).

Devices, methods, and systems for detecting airflow and temperature conditions of a fire sensing device are described herein. One device includes an airflow sensor and a controller configured to receive a measurement from the airflow sensor, compare the measurement to a baseline range, and transmit a message responsive to the measurement being outside of the baseline range.

A method comprising detecting an indoor carbon dioxide level; detecting an outdoor fine dust level; driving an air supply fan and an exhaust fan such that an air supply amount of the air supply fan is greater than an exhaust amount of the exhaust fan based on detected indoor carbon dioxide level and outdoor fine dust level; and performing a first indoor pressure control of detecting an indoor pressure and controlling the air supply fan and the exhaust fan. In the indoor pressure control, based on the detected indoor pressure being less than a first set value, a number of revolutions per minute of the exhaust fan is controlled to be decreased, and based on the detected indoor pressure is greater than or equal to a second set value greater than the first set value, the number of revolutions per minute of the exhaust fan is controlled to be increased.

An environmental control system for a building, the system including a vent. The vent includes one or more louvers configured to change position between an open position and a closed position to permit air from the air duct to enter a zone of the building or stop the air from entering the zone and a vent circuit configured to operate the one or more louvers based on one or more control commands. The system includes a controller device including a processing circuit configured to receive a selection of an operating profile from a plurality of predefined operating profiles for the vent, each of the plurality of predefined operating profiles indicating an intended use of the zone, determine, based on the operating profile, the one or more control commands, and cause the vent circuit to operate the one or more louvers based on the one or more control commands.

Systems and methods for particulate sensing of a building. Some embodiments relate to an air handling unit of an HVAC system of a building. The air handling unit includes a zone sensor configured to sample a first zone and measure a first particle disturbance of the first zone, an integrated sampling system includes one or more integrated sensors configured to measure a second particle disturbance of an outdoor air stream and a third particle disturbance of an indoor air stream. The air handling unit further includes an air handling unit controller configured to control operation of the air handling unit, responsive to comparing the second particle disturbance with at least one of the first particle disturbance or and the third particle disturbance.

A system for detecting and cleaning air pollution in indoor space with heating, ventilation and air conditioning includes one or more outdoor gas detection devices, several indoor gas detection devices, several filtering devices, and a central controller. The central controller receives air pollution data detected by the gas detection devices, by connecting to a cloud device, performs an intelligent computation and comparison on the air pollution data to locate an air pollution location, and the cloud device transmits a control command intelligently and selectively to the central controller. Therefore, according to the control command, the central controller controls the air conditioning modulation mechanism of one or more HVAC components and enables the filtering devices to generate a directed air convection, thereby achieving the filtration of the air pollution to allow the indoor air pollution data to be a safety detection value.