A ventilation arrangement has a ventilation channel with a mouth opening and a first shielding hood shielding the mouth opening. The ventilation channel widens and/or narrows in cross section towards the mouth opening. The mouth opening is encompassed by the first shielding hood, leaving free a gap.

An attic fan assembly and method for efficiently cooling an attic is provided. The assembly includes a motor, a fan blade assembly, a control unit, a condition sensor, and a speed sensor. The control unit receives a condition sensor signal from the condition sensor and determines a target speed. The control unit receives a speed sensor signal from the speed sensor and determines a present speed. The control unit sends a motor signal to control speed of the motor according to the conditions of the target speed and the present speed.

A vent arrangement for a mask system includes a mask component and a mask vent provided to the mask component. The mask vent includes a plurality of vent holes each extending through a thickness of the mask component and each including a vent exit, and a continuous side wall structured to surround the plurality of vent exits of the vent holes.

The invention non-direct vent (one pipe) or direct vent (two pipe) fuel fired appliance vent terminations spaced apart to accommodate the inward flow of combustion air and/or the outwardly flow of exhaust flue gas of a fuel fired appliance. The vent termination ends are capable of engaging the terminal ends of a variety of different size exhaust conduits including fitting sockets of a conduit fitting. The vent pipe termination can include in some aspects a vent pipe termination kit which may include, but not limited to; a vent termination main embodiment, mounting plate, screws, connector elements, threaded nuts, connector element cover, protection shield, intake screen, 90 degree elbows, sloped vent fitting, T fittings, wall anchors, decals or labels, escutcheon covers, insulating materials, caulking or other similar components.

The cyclone separation device has a case (1), a space partition plate (7), and a cylindrical member (11). The case (1) is formed into a cylindrical shape and has a first intake port (4), an outflow port (6), and a second intake port (5). The first intake port (4) has a circumferential opening (2) circumferentially formed in a side surface on a side of the one end of the case (1), and a fixed blade (3) arranged along the circumferential opening (2). The outflow port (6) is disposed on a surface on the side of the one end and discharges the swirling airflow fed through the first intake port (4). The second intake port (5) is disposed on a side surface on a side of the other end opposite to the one end.

A natural ventilator is herein disclosed that is free of moving parts, wind-activated, rain-proof, and free of dust or smog infiltration. It is not only suitable to be a standalone natural ventilator, but is also advantageous to be used as an enhanced exhaust exit in a forced-air ventilation system, for such enclosed spaces or objects as buildings and vehicles needing air relief. The ventilator assembly has rainwater-proof shapes or fixtures that serve to defend the vent system, and the interior space being vented, against rainwater invasion, even if raindrop trajectory becomes highly oblique from vertical as driven by strong winds. It also includes shapes or fixtures to prevent fume condensation from drifting outward and staining the exterior of a building or vehicle, or the like, that is being vented.

Embodiments disclosed herein relate to air flow control blinds or tents useful for controlling scents emitted therefrom. The air flow control blinds can include walls, a roof, windows in the walls, and at least one directional vent disposed on the walls, where the at least one directional vent includes an inlet on the inner surface of the blind and an outlet fluidly connected to the inlet, the outlet facing downward on the outer surface of the blind to direct fluids flowing therethrough towards the ground. The air flow control blinds may include one or more roof vents adjacent to the walls on the roof. The air flow control blind includes at least one oxidant generator mount on one or more of the roof or the walls to mount an oxidant generator thereon. Blind systems can include a portable oxidant generator positioned in the blind.

A natural ventilator is herein disclosed that is free of moving parts, wind-activated, rain-proof, and free of dust or smog infiltration. It is not only suitable to be a standalone natural ventilator, but is also advantageous to be used as an enhanced exhaust exit in a forced-air ventilation system, for such enclosed spaces or objects as buildings and vehicles needing air relief. The ventilator assembly has rainwater-proof shapes or fixtures that serve to defend the vent system, and the interior space being vented, against rainwater invasion, even if raindrop trajectory becomes highly oblique from vertical as driven by strong winds. It also includes shapes or fixtures to prevent fume condensation from drifting outward and staining the exterior of a building or vehicle, or the like, that is being vented.

A method for building a soundproof enclosure (10) in the form of an independent structure with acoustic properties for isolating noise and vibration is disclosed. The soundproof enclosure (10) comprised a plurality of acoustical wall panels (12) interconnectable each to another at opposing sides for enclosing an interior space (41) of various sizes. The soundproof enclosure (10) further comprised one or more modular multilayer ceiling unit(s) (13) assembled onto the top edges of the acoustical wall panels (12) to form the enclosure. The ceiling unit (13) comprised a plurality of ceiling layers (17), each ceiling layer (17) being vertically spaced apart with one another by brackets to topographically form the multiple guided spaces necessary for air flow circulation within the enclosure (10). These guided spaces can also house multiple implements such as circulation fan, air filter and sound silencer. Sound insulating material layer(s) are interposed between the contacting surfaces of the ceiling unit (13) and the acoustical wall panels (12) and/or all around the surfaces to isolate and decouple the ceiling unit (13) from the acoustical wall panels (12) from vibrations. A sound barrier cover (16a or 79) is interposed at the openings (25) of the air passages (24) to further reduce the sound level emitted into and exiting from the enclosure. In addition, a construction method by elevating the heavy acoustical wall panels (12) and the ceiling units (13) until they fall into precise assembly location for ease of assembly of the components of the enclosure (10) and a floor base unit 11 that enabled the enclosure (10) to about easily in whole is also disclosed. Furthermore, a method to ease assembly of the enclosure (10) by use of removable heavy-duty handles (87) is disclosed.

Air gap insulation is a common means of providing thermal insulation from the environment. In many cases the air gap is heated by direct or indirect solar radiation, so ventilating this gap has a cooling effect. The invention cools this gap by integrating moisture-absorption material units that harvest water from the air during the night and provide evaporative cooling during the day. Compared to the ambient air, the daily relative humidity fluctuations in the air gap are more extreme, allowing a significant cooling effect. Furthermore, during the night, humidity absorption on the absorption unit reduces the risk of condensation within the air gap. Additionally the absorption process generates heat, and by using a controller processes of heating, cooling and dehumidifying can be activated when possible and needed.