Provided is an air cleaner that can take a large amount of air in a large space into a dust collector with good efficiency while being lightweight and having easy maintenance. An air cleaner is provided with a drone and a dust collector. The drone has a main body unit and propellers attached to the tips of frames. The dust collector has electric discharge electrodes and a dust collection electrode. The electric discharge electrodes are connected to a booster unit within a central chamber. The booster unit is electrically connected to a control unit in the main body unit. Electric discharge is formed between the dust collection electrode and the electric discharge electrodes, and dust particles in the air are charged and collected by the dust collection electrode.

Vents are disclosed for covering openings on roofs. The disclosed vents cover openings on metal roofs and prevent moisture and objects from entering the opening while allowing air to pass therethrough. The vents disclosed herein also prevent moisture from entering the building through openings that can be created when the vents are attached to a roof. The vents include a cap, a collar, and a flashing configured to contact the roof. The vents can also include a screen placed between the cap and the collar. The collar can have arms formed on an upper portion thereof to facilitate connection of the collar to the cap. Feet can be formed on a bottom portion of the collar. Once the vent is fully assembled, the feet can be positioned underneath the flashing and can be the main connection point of the vent to a roof. Due to the design of this assembly, fasteners pass through the feet providing a sound and secure attachment to the roof. The feet are then covered from moisture, rain, and/or snow by a flashing, and the flashing is then secured by screws or other fasteners passing through the reinforcement material and through the flashing itself which provides a weatherproof seal.

Vents are disclosed for covering openings on roofs. The disclosed vents cover openings on metal roofs and prevent moisture and objects from entering the opening while allowing air to pass therethrough. The vents disclosed herein also prevent moisture from entering the building through openings that can be created when the vents are attached to a roof. The vents include a cap, a collar, and a flashing configured to contact the roof. The vents can also include a screen placed between the cap and the collar. The collar can have arms formed on an upper portion thereof to facilitate connection of the collar to the cap. Feet can be formed on a bottom portion of the collar. Once the vent is fully assembled, the feet can be positioned underneath the flashing and can be the main connection point of the vent to a roof. Due to the design of this assembly, fasteners pass through the feet providing a sound and secure attachment to the roof. The feet are then covered from moisture, rain, and/or snow by a flashing, and the flashing is then secured by screws or other fasteners passing through the reinforcement material and through the flashing itself which provides a weatherproof seal.

A partitioning member for a total heat exchange element includes a sheet shaped porous base, a moisture permeable membrane provided on the porous base, and a functional material. The functional material produces at least one of an antifungal effect, an antibacterial effect, and an antiviral effect. The moisture permeable membrane contains the functional material. Alternatively, a partitioning member for a total heat exchange element includes a functional membrane containing a functional material producing at least one of an antifungal effect, an antibacterial effect, and an antiviral effect, with the functional material covering a surface of the porous base or the moisture permeable membrane.

A partitioning member for a total heat exchange element includes a sheet shaped porous base, a moisture permeable membrane provided on the porous base, and a functional material. The functional material produces at least one of an antifungal effect, an antibacterial effect, and an antiviral effect. The moisture permeable membrane contains the functional material. Alternatively, a partitioning member for a total heat exchange element includes a functional membrane containing a functional material producing at least one of an antifungal effect, an antibacterial effect, and an antiviral effect, with the functional material covering a surface of the porous base or the moisture permeable membrane.

The present disclosure relates to an air duct device and an air handling apparatus. The air duct device can include a first air duct and a second air duct. The first air duct has an air inlet and an air outlet. The second air duct has an air input channel passing by the air outlet of the first air duct, and an air outlet that is in communication with the first air duct.

An air mixing system includes a building superstructure having an open space therein and an attic. An air mixing unit mounted to the ceiling draws air from the open space and the attic, mixes the air and discharges the mixed air outwards from the fan.

An air mixing system includes a building superstructure having an open space therein and an attic. An air mixing unit mounted to the ceiling draws air from the open space and the attic, mixes the air and discharges the mixed air outwards from the fan.

A method and an arrangement for air-conditioning a cold aisle which is partially bounded by heat-generating devices and is arranged in a hot room, the hot room being separated from a second room by a boundary wall, and a region of the boundary wall is formed by a heat exchanger, such that air that is conveyed through the heat exchanger by the fan is supplied to the cold aisle. An opening with a fan is provided in the boundary wall. The cold aisle is connected to the boundary wall so that the opening is surrounded by the cold aisle.

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls proximate the top opening holding one or more hinge connected panels that manually release to rotationally close the passage and are manually rotationally liftable to a home position allowing ventilation. A panel drain automatically closes when the panel is raised to home position so it is already closed when the panel is released to rotationally close the passage.