A heating, ventilating, and air conditioning (HVAC) unit includes a filter track assembly that includes a bulkhead frame, a first rail configured to support a first air filter, and a second rail configured to support a second air filter. The first rail and the second rail are coupled to the bulkhead frame, and the first rail and the second rail are disposed on opposing sides of the bulkhead frame.

Provided herein is a portable air purifier. The portable air purifier includes: a body; first to third accommodation portions configured to have respective open top surfaces in order to separately accommodate a battery, an air compressor, and water; first to third covers configured to selectively open and close the respective open top surfaces of the first to third accommodation portions; an air inlet connected to the lower portion of the second accommodation portion, and configured to accommodate a pre-filter; a siphon pipe positioned upright inside the water of the third accommodation portion, and configured such that the top thereof is connected to the air outlet of the air compressor; a cannula installed on the top of the third accommodation portion, and configured to supply purified, humidified air to a user; and a power switch configured to control the amount of air to be supplied.

Disclosed herein are base metal catalyst devices for removing ozone, volatile organic compounds, and other pollutants from an air flow stream. A catalyst device includes a housing, a solid substrate disposed within the housing, and a catalyst layer disposed on the substrate. The catalyst layer includes a first base metal catalyst at a first mass percent, a second base metal catalyst at a second mass percent, and a support material impregnated with at least one of the first base metal catalyst or the second base metal catalyst.

The application provides a fresh air purification window for preventing haze. A ventilation device is provided with an upper layer and a lower layer and partitioned by a transverse middle-layer partition plate, an exhaust fan is mounted in the upper layer, an air feeder is mounted in the lower layer, an air inlet grille is formed on the upper layer through front-layer glass, and a half-closed space with an air cavity unidirectionally provided with an exhaust opening is formed by the upper layer, upper-layer glass, a middle-layer separation partition plate and air cavity one-sided glass. The fresh air purification window has the effects of lowering the shielding light ray of the current purification window and enabling the current purification window to be compact in structure.

The invention relates to a filtering apparatus and method for treating polluted indoor air, which can be operated by gas scrubbers, adsorbers, or through the use of a microbial biodegrading medium for polluting gases, wherein said apparatus allows the biofiltration method to be efficient and applicable in indoor spaces. The technical problem of the efficiency of the filter has to do with said filter being able to process the greatest amount of pollutants during a minimum residence time and with a filter bed volume that allows the application thereof in apparatus that have an adequate size for indoor spaces, such as spaces inside the household, i.e., allowing the reactor to operate at maximum capacity without having to increase the size thereof.

The present invention provides an indoor fresh air apparatus, comprising a body, an elementary filtering means, a deodorizing module, a blowing-in machine, a first haze removing module, a second haze removing module and a third haze removing module. The body is provided with an air-in passage serving as an air-in end and an air-out passage serving as an air-out end. The elementary filtering means is disposed at the air-in end; the deodorizing module is disposed within the air-in passage; and the blowing-in machine is disposed at the air-out end. The air-in passage, the first haze removing module, the second haze removing module, the third haze removing module and the air-out passage are connected in order. The air treatment unit provided by the present invention is capable of not only completely recovering cold energy or heat energy of indoor air, but also effectively treating indoor and outdoor PM2.5 and harmful gases.

The present invention provides an air filtering system for use in a building and an HVAC system, wherein the air filtering system comprises: an outside-air inlet; a first filtering stage at the downstream of the outside-air inlet; a second filtering stage at the downstream of the first filtering stage; a collection module for collecting outside-air quality information; and a control module in communication with the collection module, wherein the control module adjusts an operation state of the first filtering stage and/or the second filtering stage based on the air quality information collected by the collection module. The system of the present invention has the advantages of energy saving, low maintenance cost, etc.

The present invention relates to an integrated basement ventilation apparatus, and more particularly, to an integrated basement ventilation apparatus which can improve a basement ventilation apparatus and thereby perform an adiabatic cooling using latent heat when air is supplied, and in a case of outbreak of fire, forcibly close a damper closed or opened by itself as air is exhausted, and allow general automatic control depending on a local air condition in a basement structure and which can control an increase in temperature in the basement structure at a low cost and enhance a fire safety, and in particular, can suppress the fire early and significantly enhance the quality of air in the basement structure, thereby significantly enhancing condition and maintenance of whole facilities.

An ecological city system is provided including a core structure and a set of circularly arranged structures having various functions surrounding the core. A plurality of radially arranged transportation structures provide transportation between the circularly arranged structures and the core structure. The ecological city system sustains inhabitant life via a closed loop system for maximizing ecological sustainability, ecological harmony, inhabitant safety, and economic performance and efficiency.

A road vehicle with a vehicle frame and a rear axle connected to the vehicle frame is provided with an ambient air purification device with filter elements for removing dust, particulate matter, and gases from ambient air. The ambient air purification device is arranged transverse to a longitudinal vehicle axis in an exterior region of the road vehicle at a vehicle rear of the road vehicle in an underfloor region such that at least the filter elements are arranged behind the rear axle of the road vehicle in a travel direction of the road vehicle. The ambient air purification device is received in an installation space of the vehicle frame. The ambient air purification device is flowed through in longitudinal vehicle direction. A free outflow zone of the ambient air purification device is arranged, in travel direction of the road vehicle, behind the ambient air purification device.