Abstract: A device for phase separation of a multiphase mixture with at least one gas and at least two fluid phases may include a vessel including a tangential inlet via which the multiphase mixture is conveyed to the vessel, a tangential gas outlet above the inlet, via which a gas phase of the multiphase mixture separated from the multiphase mixture can be taken out of the vessel, and at least two outlets below the inlet at different vertical heights, via which one of the at least two fluid phases of the multiphase mixture respectively separated from the multiphase mixture can be taken out of the vessel. Further, a method for phase separation of a multiphase mixture using such device may include imparting an upwards-directed eddy flow to the multiphase mixture, during which fluid droplets are separated from the multiphase gas mixture, collecting the fluid droplets, and separately removing all phases formed.

Abstract: The present invention provides an air filter including a main body, a pressure fan, a filter mode and a fixing assembly. The main body has a containing room, an entrance hole and an exit hole. The pressure fan is disposed in the containing room. The filter mode comprises a first filter layer, a second filter layer and a frame body. The first filter layer is disposed in the entrance hole, and the second filter layer is disposed in the frame body. As such, users can select to use only the first filter layer or both filter layers at one time. Moreover, users only need to let the frame body pivot to a position away from the entrance hole so that users can change the filter layers faster and easier.

Abstract: An air intake (2) for a turbine engine, and a method implemented by the air intake (2) are disclosed. The air intake (2) is provided with a filter system (10) including foldable filter elements (11), arranged at the inlet section (3) of the air intake (2). In addition, the filter system (10) includes control elements (11) that exert a force along a first direction (Y) on the free end (11?) of the foldable filter elements (11) to adjust the filtering power of the filter system (10), guide members (12) of the filter system (10) serving to guide the movement of the free end (11?) induced by the control elements (13).

Abstract: The invention relates to an air cleaning device essentially comprising at least a vertical hollow structure having a first perforated side surface forming an inlet (1-2) for the air to be cleaned and a second perforated side surface forming an outlet (3-4) for the cleaned air. The invention is characterized in that the vertical hollow structure is covered with a protective cover and decorative elements (15) are positioned outside said cover in order to conceal the vertical hollow structure completely or partially. The structure contains filter units, as well as a fan (6-7) that forces the passage of air between the air inlet and the air outlet, thereby eliminating impalpable components and preventing a reaction with impure gases which are also eliminated.

Abstract: A control device for a filtration unit for filtering a fluid, the control device comprising an integrity test unit for performing an integrity test for checking the functional integrity of the filtration unit, and a reaction unit for determining a reaction based on a result of the integrity test.

Abstract: A mobile system for intervention in an atmosphere of radioactive gas, notably tritium, which, includes; a dynamic confinement device, including & removable confinement barrier to surround an intervention, zone and a device for controlled extraction of air to keep the zone at a lower pressure than the exterior; a device for monitoring the radioactive gas concentration in the air of the zone; a device to detect and signal the exceedance of a predefined threshold by this concentration to the persons present in the zone.

Abstract: An indicator for a refrigerator filter which has a body configured to contain a replaceable filter cartridge and including an openable cap to enclose the filter cartridge within the body. The indicator includes a control having a filter life determination mechanism and arranged to emit a signal when a life of the filter cartridge is determined to be expired. A visual display is arranged in association with the body which comprises an illuminating component which illuminates upon receipt of the signal from the control, graphics positioned in association with the body, and a light pipe extending from the graphics towards the illuminating component to transmit light from the illuminating component to the graphics.

Abstract: A ventilation device uses a cross-flow fan and one or more filters, where the filter preferably has a J-shape that at least partially surrounds the rotor of the cross-flow fan. In one embodiment, the filter includes a plurality of pleats, preferably along a bottom surface of the filter. The filters preferably remove particles, undesired gases, and micro-organisms. A filtration and ventilation system with at least one first ventilation device and at least one second ventilation device larger than the first ventilation device, as well as a method of filtering contaminants out of air using a personal ventilation device, are also disclosed.

Abstract: Embodiments of the invention generally provide a containment system having integrated bubble tight-dampers. In another embodiment, the containment system includes an integral auto-scan mechanism disposed in the housing of the containment system so that a filter element, disposed in the housing, may be leak tested without accessing the interior of the housing. In yet another embodiment, a method for testing a filter disposed in a containment system includes challenging an upstream side of a filter element disposed in a housing of the containment system with a test aerosol, and automatically moving a probe disposed within the housing to obtain samples for leak testing.

Abstract: An air filter assembly has a fan, pre-filter, a main filter, and a control circuit which generates various signals to the user as to when the pre-filter and the main filter should be replaced. The control circuit detects when the pre-filter should be replaced from two conditions: a first pre-filter replacement condition based decreased air flow, and a second pre-filter replacement condition based on cumulative operating time. The control circuit detects when the main filter should be replaced based on a formula containing a number of the occurrences of the first pre-filter replacement condition and a number of occurrences of the second pre-filter replacement condition. The control circuit also detects a main filter replacement condition based on cumulative operating time of main filter. The main filter can have a fuse that is blown when the main filter should be replaced.

Abstract: A filter cassette and a method for allowing a leak to be detected are disclosed, in which the filter cassette comprises a main body defining a first chamber. The main body includes an inlet and an outlet, a filter separating the first chamber into first and second sub-chambers, the inlet being in fluid communication with the first sub-chamber and the second sub-chamber being in fluid communication with the outlet. The main body also includes a second chamber is defined by the main body and the filter, wherein in absence of a leak the second chamber is substantially not in fluid communication with the first chamber. The main body further includes a port in fluid communication with the second chamber, whereby measuring a fluid characteristic in the second chamber by means of the port allows a detection of a leak, i.e. an external leak or a bypass leakage.

Abstract: Systems and methods for processing high purity materials are disclosed. A unit operation processes a material stream, an operational parameter of the unit operation is monitored, and a standby unit is charged with pressurized gas to achieve system pressure. The material stream is diverted to the standby unit in response to the operational parameter of the unit operation registering a threshold value. Flow exiting the standby unit is first vented via an outlet, and then directed toward a point of use after the pressurized gas has been purged. The unit operation may then be serviced and subsequently brought back online. A second unit operation may process a second material stream simultaneously, and the second material stream may be periodically diverted to the standby unit in like manner, thus reducing line pressure variation. The disclosed method may be performed manually or implemented automatically through use of a controller.

Abstract: A method for purifying polluted air having particle phase pollutants and gaseous phase pollutants is provided. The method comprising: separately purifying and treating particle phase and gaseous phase pollutants present in the air; providing a dust cleaning apparatus, a catalytic filter core and a valve for controlling an airflow path within an air purification apparatus; controlling the airflow path for the air to bypass the catalytic filter core in a way that: if the amount of particle phase pollutants is above a predetermined value, the valve is moved to the open position to enable the air to bypass the catalyst filtering core; if the amount of particle phase pollutants is less than a predetermined value, the valve is moved to the closed position to force the air to pass through the catalyst filtering core.

Abstract: The present invention provides a system and method for transmitting information between a device within a housing to a second device, preferably a test or monitoring unit, outside of the housing. There are numerous issues associated with transferring information from within a sealed housing to an external device. In some cases, the use of wires inside the housing may be impractical, due to internal conditions, such as fluid flow, pressure or temperature. In one embodiment, the antenna of the external RF reading device is electrically connected to the dome of the housing. In another embodiment, the device within the housing is electrically connected to a housing component. In another embodiment, the gasket is used to pass information from within the housing to an external device.

Abstract: The present invention provides a system and method for transmitting information between a device within a housing to a second device, preferably a test or monitoring unit, outside of the housing. There are numerous issues associated with transferring information from within a sealed housing to an external device. In some cases, the use of wires inside the housing may be impractical, due to internal conditions, such as fluid flow, pressure or temperature. In one embodiment, the antenna of the external RF reading device is electrically connected to the dome of the housing. In another embodiment, the device within the housing is electrically connected to a housing component. In another embodiment, the gasket is used to pass information from within the housing to an external device.

Abstract: The present invention provides a system and method for transmitting information between a device within a housing to a second device, preferably a test or monitoring unit, outside of the housing. There are numerous issues associated with transferring information from within a sealed housing to an external device. In some cases, the use of wires inside the housing may be impractical, due to internal conditions, such as fluid flow, pressure or temperature. In one embodiment, the antenna of the external RF reading device is electrically connected to the dome of the housing. In another embodiment, the device within the housing is electrically connected to a housing component. In another embodiment, the gasket is used to pass information from within the housing to an external device.

Abstract: A real-time monitoring system that monitors various aspects of the operation of a refrigerant-cycle system is described. The system includes a processor that measures power provided to the refrigerant-cycle system and gathers data from one or more sensors in connection with a filter element.

Abstract: An air elutriation device for an air conveying household appliance includes a housing with an air elutriation zone delimited by a filter element, a detection element in a storage space for the filter element, and a cover sheet on the filter element. The detection element can be actuated via the filter element by the cover sheet.

Abstract: An apparatus for purifying and humidifying air which enables separate supply of purified air and humidified air and controls the amount of humidified air discharged and which includes dual flow paths to increase the efficiency of air transfer. The apparatus includes a case having a suction port through which external air is introduced thereinto and a discharge port through which the introduced air is discharged, a circulation fan for causing the introduced air to flow toward the discharge port, a filter unit disposed in the case to filter the introduced air, a humidification unit disposed at a low position in the case to supply the air passed through the filter unit with moisture, and a flow path control unit disposed between the suction port and the humidification unit to control flow of the air passed through the filter unit.

Abstract: Various embodiments of air treatment devices (and housings therefor) are provided. The housings are generally configured to provide air treatment devices that lessen the perceived size of the air treatment devices. Further, embodiments provide housings that are typically easier to clean and maintain and to provide ease in access to internal components of the air treatment devices. Embodiments may also position a control display associated with an air treatment device, such that the control display is visible from a position in front and above the air treatment device. Embodiments may also be configured to minimize and/or inhibit air exiting from the air outlet of the air treatment device from immediately reentering the air inlet and thus being recirculated.

Abstract: A system and method for supercritical fluid enrichment of radioactive isotope/s are disclosed. The method involves pressurizing an outer chamber and an inner centrifugal chamber of a stage to supercritical pressure; supplying material including target isotope/s at supercritical pressure to the inner chamber; spinning the inner chamber to centrifuge the material including target isotope/s; providing a differential pressure between the inner chamber and the outer chamber; wherein windows in the inner chamber enable passage of the target isotope from the inner chamber to the outer chamber in response to the differential pressure.

Abstract: A dust bin for a robotic vacuum comprises a dust bin frame having a cavity defined therein to receive debris, a filter frame disposed within the dust bin frame and defining two filter openings at opposite sides thereof, and a central impeller disposed adjacent to or under the filter frame to draw air from outside of the dust bin into the dust bin. The dust bin also comprises two air filters, one air filter being located on each side of the central impeller, each air filter being inserted into one of the filter openings, each filter having an overhang around a perimeter thereof that includes a sealing face to form a vacuum-assisted seal with the filter frame when air is drawn into the dust bin.

Abstract: Methods are disclosed for inspecting a cylindrical porous ceramic body by positioning a diffuser near, and spaced apart from, the first end of a ceramic body; flowing a tracer flow toward the diffuser, wherein a first portion of the tracer flow passes through the diffuser, and a second portion of the tracer flow does not pass through the diffuser, the first and second portions of the tracer flow then entering the first end of the ceramic body, wherein the average velocity of the first portion of the tracer flow entering the ceramic body VAVG1 is lower than the average velocity of the second portion of the tracer flow entering the ceramic body VAVG2; directing light toward the second end of the ceramic body; and detecting reflected light coming from a location proximate the second transverse face at the second end of the ceramic body.

Abstract: A sealed air purifier is disclosed. A housing is formed by connecting a first shell and a second shell. The first shell and the second shell communicate via separable connecting base and connector. A retractable bag encloses the connecting base and the connector. A sealing structure is provided between both ends of the bag. The first shell has an air inlet connecting the inside and the outside and a gate to control the airflow. A compression assembly is disposed in the first shell. The second shell has an air outlet connecting the inside and the outside and a blocking element to control the air outlet. The second shell has a sterilizing device and a super ULPA filter. When the gate closes the air inlet, the compression assembly, sterilizing device, and the air outlet close correspondingly, so that the inside of the housing is isolated. Thus, the viruses remaining therein do not spread with air.

Abstract: A method of manufacturing an exhaust gas purifying apparatus includes providing an exhaust gas-treating body. A holding sealing material is provided. The holding sealing material includes inorganic fibers. The holding sealing material has a first end face and a second end face each provided approximately in parallel with a width direction. The holding sealing material is wound around a periphery of the exhaust gas-treating body to form a gap between the first end face and the second end face. The exhaust gas-treating body with the holding sealing material is housed in a casing. At least one of a first electrode member and a first sensor is disposed at the gap of the holding sealing material so that at least one of the first electrode member and the first sensor is connected to the exhaust gas-treating body, passes through the holding sealing material, and penetrates the casing.

Abstract: An air treatment apparatus and method are disclosed in the present invention, wherein, at least one air treatment unit is included. The unit comprises air inlet, air outlet, air treatment devices and connecting components. The air treatment device is located between the air inlet and the air outlet. The air treatment device comprises at least one of the following components: component for air purification and filtering, blow-through fan, draw-through fan, pump, component for heating, component for dehumifying, component for humidifying, component for air-cooling. The air treatment unit can be used alone for improving the air quality of the environment. When more than one unit are connected together with the connecting components, the units are teamed up and work together, and an air treatment system is formed.

Abstract: A powered air cleaning system has a flow path extending through the system from an inlet to an outlet. A motor-driven fan is located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow. An ejector port ejects particulate debris laden air from the stratified rotating flow in the system. At least one de-swirl component located within the rotating flow aerodynamically redirects clean air from the innermost orbits of the stratified rotating flow toward the outlet to provide a positive airflow pressure out of the outlet. The system has a variable speed fan motor and an integrated controller for adjusting the speed of the motor and thereby the flow rate of clean air through the outlet of the system. The controller receives a signal that is a function of airflow requirements of a device supplied with clean air by the system.

Abstract: A method for purifying polluted air having particle phase pollutants and gaseous phase pollutants is provided. The method comprising: separately purifying and treating particle phase and gaseous phase pollutants present in the air; providing a dust cleaning apparatus, a catalytic filter core and a valve for controlling an airflow path within an air purification apparatus; controlling the airflow path for the air to bypass the catalytic filter core in a way that: if the amount of particle phase pollutants is above a predetermined value, the valve is moved to the open position to enable the air to bypass the catalyst filtering core; if the amount of particle phase pollutants is less than a predetermined value, the valve is moved to the closed position to force the air to pass through the catalyst filtering core.

Abstract: A filter system for an explosion-proof enclosure is described herein. The filter system can include a pre-filter assembly located outside the explosion-proof enclosure. The pre-filter assembly can include a pre-filter material configured to control air passing therethrough. The filter system can also include a filter assembly coupled to the pre-filter assembly. The filter assembly can further control the air received from the pre-filter assembly and passing therethrough into the explosion-proof enclosure.

Abstract: A filter element, a particle filter, a method for marking a filter element, a method for producing a particle filter and the use of a filter element are described. With such methods and filter elements, individual filter elements can be securely adhered in a simple manner to form a filter. An identification means is applied to the end surfaces of each filter element for producing a particle filter, thus enabling the defined orientation of the filter elements for the adhesive process and preventing erroneous adhesion.

Abstract: A method is described for identifying faults relating to an HVAC system, such a clogged filter. Sensor data is used to estimate HVAC system efficiency. Trends in system efficiency are then used to identify faults such as clogged filters. The sensor(s) can include one or more of the following types: optical sensor, temperature sensor, pressure sensor, acoustic transducer, humidity sensor, resistive sensor, capacitive sensor, and infrared sensor. The efficiency estimation can also be based on conditions external to the building, such as data from exterior sensors and/or data gathered from third parties such as government or private weather stations. The efficiency estimation can also be based on performance metrics such as the time used to reach a set point temperature. The fault identification includes filtering out non-fault related events. An instrumented air filter for use with an HVAC system is also described.

Abstract: A vertically directed dryer unit (10) for compressed air, comprising a dryer cartridge (22) which, together with a housing (16, 18, 20), defines an inlet head area (92) and an outlet head area (72). A plurality of hollow membrane fibers (30) extend inside the cartridge between the two head areas, the wall material thereof being more permeable with respect to water vapor than air. An outlet valve (90) is provided between the outlet head area (72) and an outlet (74) of the drier unit. Said valve only opens when the pressure in the outlet head area (72) produces sufficient pressure for the provision of purging air. The purging air is fed to the outer surface of the membrane fibers (30) via a throttle element (70).

Abstract: A container having a plurality of walls, and at least one inlet and/or outlet, said container including an apparatus for controlling the composition of gases within the container, the apparatus including at least one sensor, at least one controller and at least one gas permeable membrane, through which membrane different gases can pass at different rates, said membrane dividing the container into a first region being for holding cargo and a second region defining a gas buffer region, and said membrane being permeable permitting for nitrogen, oxygen and carbon dioxide at different flow rates, wherein the buffer region is in communication with the ambient atmosphere through one or more vacuum pump(s).

Abstract: A feed gas conditioner.

Abstract: One example embodiment includes a system for removing cooling liquid from a mist. The system includes an intake, where the intake is configured to receive the cooling mist. The system also includes a mist filter, where the mist filter is configured to remove cooling liquid from the mist. The system further includes an exhaust, where the exhaust is configured to output the demisted air.

Abstract: An apparatus for purifying and humidifying air which enables separate supply of purified air and humidified air and controls the amount of humidified air discharged and which includes dual flow paths to increase the efficiency of air transfer. The apparatus includes a case having a suction port through which external air is introduced thereinto and a discharge port through which the introduced air is discharged, a circulation fan for causing the introduced air to flow toward the discharge port, a filter unit disposed in the case to filter the introduced air, a humidification unit disposed at a low position in the case to supply the air passed through the filter unit with moisture, and a flow path control unit disposed between the suction port and the humidification unit to control flow of the air passed through the filter unit.

Abstract: A vertically directed dryer unit for compressed air, comprising a dryer cartridge which, together with a housing, defines an inlet head area and an outlet head area. A plurality of hollow membrane fibers extend inside the cartridge between the two head areas, the wall material thereof being more permeable with respect to water vapor than air. An outlet valve is provided between the outlet head area and an outlet of the drier unit. Said valve only opens when the pressure in the outlet head area produces sufficient pressure for the provision of purging air. The purging air is fed to the outer surface of the membrane fibers via a throttle element.

Abstract: A system and associated method for improved mercury removal from a flow containing combustion exhaust. The system includes a filtration arrangement through which the flow proceeds to remove material, including mercury, from the flow. The system includes a sensor arrangement sensing a mercury concentration within the flow downstream of the filtration arrangement and providing a signal indicative of the sensed mercury concentration. The system includes an adjustable temperature control arrangement changing a temperature of the combustion exhaust proceeding to the filtration arrangement in response to the signal indicative of the sensed mercury concentration to change an amount of mercury being removed from the flow.

Abstract: A first intake air control mode of setting an intake throttle valve to (or close to) a fully-opened state and setting an EGR valve to (or close to) a fully-closed state is performed when DPF temperature and a particulate matter deposition quantity are greater than corresponding predetermined values respectively, a no-injection operation state exists, and engine rotation speed is higher than a corresponding predetermined value. A second intake air control mode of setting the intake throttle valve to (or close to) a fully-closed state and setting the EGR valve to (or close to) a fully-opened state is performed when the DPF temperature and the particulate matter deposition quantity are greater than the corresponding predetermined values respectively, the no-injection operation state exists, and the engine rotation speed is lower than the corresponding predetermined value.

Abstract: Embodiments of the invention generally provide an apparatus and method for certifying a filter in a containment system without decontaminating the containment system prior to certification. The apparatus generally comprises a valve assembly selectable between at least three operational states. A first state prevents flow from prevents flow through a port of a housing. A second state fluidly couples the port to test equipment necessary to test a filter disposed within the housing. A third state seals the port but fluidly couples the test equipment to a decontamination system.

Abstract: A system and process for gas homogenization is disclosed. This has application in the areas of generation of gas and its conversion to electricity in downstream applications. The homogenization system minimizes variance in the gas characteristics (composition, flow, pressure, temperature), thereby rendering a steady stream of gas of consistent quality to the downstream machinery. This homogenization system can be adjusted to optimize the output gas stream for specific end-applications, or to optimize the output gas stream for different input feedstocks. This ensures that overall conversion efficiencies are maximized while keeping the process cost-effective. Such a uniform, steady output gas stream has a wide range of applications in the broad areas of generation of electricity (e.g. using internal combustion engines and combustion turbine engines), chemical synthesis (e.g.

Abstract: A filter assembly is provided for an appliance that performs a useful cycle of operation on a physical article and uses a resource that passes through the filter assembly. The filter assembly includes at least one replaceable filter mounted in a filter holder. The filter holder has at least one control board having software architecture configured for communication on a network including other control boards or clients. The control board has at least one functionality of a universe of functionalities, and the functionality has a unique identifier, where the unique identifier can be communicated by the software architecture over the network. The filter assembly has at least one node in communication with the network, so that the filter assembly can monitor and record events, communicate, or affect the cycle of operation of the appliance.

Abstract: A system for fluid filtration and for providing an indication of filtration operation. The system uses a filtration media for permitting flow of fluid there through and for filtering at least one material from the fluid. The filtration media has an upstream side and a downstream side. The system includes a member located adjacent to the downstream side of the filtration media and permitting flow of the fluid there through. The member retains at least some of the at least one material not filtered from the fluid by the filtration media. The member is contrast to the at least one material so that an indication of locality of reduced filtration of the at least one material is provided.

Abstract: The present invention provides a system and method for transmitting information between a device within a housing to a second device, preferably a test or monitoring unit, outside of the housing. There are numerous issues associated with transferring information from within a sealed housing to an external device. In some cases, the use of wires inside the housing may be impractical, due to internal conditions, such as fluid flow, pressure or temperature. In one embodiment, the antenna of the external RF reading device is electrically connected to the dome of the housing. In another embodiment, the device within the housing is electrically connected to a housing component. In another embodiment, the gasket is used to pass information from within the housing to an external device.

Abstract: Herein are disclosed devices and methods that can be used to provide an indication of the need to change a filter in a small forced air handling unit, based on the actual operating time (runtime) of the unit. The methods rely on the use of at least one vibration sensor that is placed in contact with a surface of an exterior component of the air handling unit and that can determine whether the unit is operating by sensing vibrations of the surface caused by operation of the unit.

Abstract: A control system and associated methods for an air treatment system. In one aspect, the present invention provides a control system and method for controlling blower speed as a function of separately determined smoke and dust concentrations. In one embodiment, the control system and method provides a variable delayed between changes in motor speed to address undesirable rapid changes between speeds. In another aspect, the present invention provides a system and method for calibrating a sensor to provide more uniform operation over time. In yet another aspect, the present invention provide a system and method for calibrating motor speed to provide more consistent and uniform motor speed over time. The present invention also provides a system and method for tracking filter life by as a function of time, motor speed and/or a sensed variable, such as particulate concentration in the environment.

Abstract: A measuring unit arranged to measure a clean environment is placed on a cell by a retrieval and storage apparatus to measure clean environment of the cell. Based on a measurement result, a fan filter unit or an exhaust vent is controlled to maintain the clean environment of the cell at a predetermined level or more.

Abstract: An air filter with a clog-detecting device includes a housing having a wind outlet and a wind intake, a filter unit positioned between the wind outlet and the wind intake, an exhauster disposed between the wind outlet and the filter unit, a magnetic induction unit positioned on the exhauster, and a warning unit assembled on the housing and electrically connected with the magnetic induction unit. A metallic plate is axially fixed on the rotating spindle of a motor and positioned adjacent to the magnetic induction unit, having its upper side formed with at least one projection to enable the magnetic induction unit to induce the metallic plate and produce pulse signals. Thus, by detecting the frequency of the pulse signal, a user can know whether the air filter is clogged or not and proceed to remove the clogged condition to let the air filter continue to work normally.

Abstract: A portable water extracting and purification system for converting filtered ambient air moisture into water may include a free-standing support frame and a reservoir removably engaged to the support frame and provided with a handle. The system may further include a mechanism for filtering ambient air prior to entering the support frame. Additionally, a mechanism may be included for extracting moisture from the filtered ambient air by inducing condensation to form and deposit water into the reservoir. An additional mechanism may be included for automatically toggling the moisture extracting mechanism between operating and non-operating modes upon detecting first and second triggering events respectively.

Abstract: An inlet filter house is provided for use with a turbine engine including an inlet duct. The inlet filter house is coupled to the inlet duct and includes an inlet hood including a filter assembly selectively positionable between an operating position and a bypass position. An actuating assembly is coupled to the filter assembly to selectively position the filter assembly. A sensor is configured to detect at least one operating parameter. A controller is coupled to the sensor for actuating the actuating assembly based on the at least one operating parameter.