A filter device and a filter system are provided. A magnetic unit is disposed on at least one side of the filter device. The filter device includes a filter and a magnetic fixing device. The filter includes a first side wall. The magnetic fixing device includes a body, a clipping portion, and the magnetic unit. The body includes a top edge, a bottom edge, a first side face, and a second side face opposite to the first side face. The clipping portion includes a top flange extending from the top edge along the facing direction of the first side face by a first distance and a clip plate extending from an outer edge of the top flange toward the bottom edge by a second distance. The first side wall is clipped between the clip plate and the first side face. The magnetic unit is disposed on the second side face. The filter system includes a frame and the filter device.

An air cleaning system can rapidly senses occurrence of local pollution, caused by fine dust, through a remote sensor hub and supplies purified air to a polluted area in a concentrated manner, thereby quickly purifying indoor air.

A clean room supporting multiple air filter elements within a frame having multiple tracks to support extensions on individual edges of the air filter elements. Within the multiple tracks are a tape of elastic ultralow density polytetrafluoroethylene polymer having a specific density of always less than 1.0, preferably less than 0.8 and most preferred as greater than 0.25 and less than 0.6 positioned along the length of the tracks.

A negative air filtration system and a method of operating a negative air filtration system are provided. The negative air filtration system includes a housing, a pre-filter, a HEPA filter, and a fan assembly. The housing including an inlet and an outlet. The pre-filter is disposed within the housing, downstream of the inlet. The HEPA filter is disposed within the housing, downstream of the pre-filter. The fan assembly is disposed within the housing, downstream of the HEPA filter. The fan assembly is in airflow communication with the pre-filter and the HEPA filter. The fan assembly is configured to generate a negative pressure across the pre-filter and the HEPA filter. The fan assembly may include a constant torque motor. The negative air filtration system is designed to have reduced complexity and increased reliability when compared to existing negative air filtration systems.

An air cleaning system having at least one dust sensor and a method for controlling the air cleaning system may improve accuracy of dust sensors through linkage control of the dust sensors, and may normally operate a faulty air cleaner using dust sensors of the remaining communicating air cleaners other than the faulty air cleaner even when any one of the dust sensors fails to operate. The air cleaning system may select a master dust sensor through linkage control of the dust sensors, and may operate the plurality of air cleaners only using sensor information of the master dust sensor. Therefore, the air cleaning system may stop operation of the remaining dust sensors other than the master dust sensor, may reduce measurement noise produced by the dust sensors and power consumption, and may increase a lifetime of the dust sensors.

A system and method for maintaining, monitoring and improving air quality and purity in a room or environment, such as a hospital room or operating room.

Fume extraction device, in particular laboratory fume extraction device, including a housing with an operating chamber that is accessible to an operator through an operating hole in the housing; the operating chamber is defined by a base, side walls and a cover; the operating hole and/or at least one fresh air supply hole in the area of the operating hole is/are provided for allowing fresh air to flow into the operating chamber, and at least one waste air hole in the area of the cover is provided for allowing waste air to escape. At least one filter holder for accommodating at least one filter element is placed upstream of the at least one waste air hole; the at least one filter holder is accessible through the operating hole such that the filter element is accessible and replaceable from the operating chamber.

Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.

An emissions collection system that includes a containment system, the containment system including a plurality of walls and a roof structure that together form an internal chamber; wherein chamber inlets are formed in one wall of the plurality of walls; and wherein chamber outlets are formed in either another wall of the plurality of walls or the roof structure. A filter assembly includes a filter that collects emissions generated within the internal chamber; and a duct system that places the chamber outlets in fluid communication with the filter assembly; wherein the filter assembly is sized and configured to move air through the chamber inlets, the internal chamber, the chamber outlets, the duct system, and the filter to collect emissions generated within the internal chamber.

An air mover for forcing air through the system, a pre-treating stage with a particulate filter for removing larger contaminants from the air and an antimicrobial (e.g., copper and silver) filter for killing or damaging microorganisms, a UV chamber including an ultraviolet lamp that emits radiation and a catalytic (e.g., TiO.sub.2-coated) device and a reflective (e.g., mirror-finish anodized aluminum) lining for amplifying the UV radiation for killing microorganisms, a post-UV stage including a VOC-reducing (e.g., activated-charcoal) filter for removing odors and VOCs from the air, and optionally a supply of a surface disinfectant (e.g., ClO.sub.2). In example embodiments, the UV lamps and VOC filters are selected and configured for controlling microbial pathogens, and in other example embodiments they are selected and configured for removing ethylene from the air.