A passive ventilation control system and method. The system includes passive vents throughout a building. The vents may be arranged in multiple sets, with each set being substantially vertically aligned through multiple floors or the entire height of the building. Sensors are positioned inside and/or outside the building for sensing different environmental parameters or atmospheric conditions. The sensors send signals to a controller, which automatically adjusts airflow through the vents in response to the signals from the sensors.

A structure comprises at least one outer wall having an internal wall section and an outer wall section with an air flow passage therebetween. A circulation system circulates air through the flow passage to inhibit moisture accumulation and mold growth. A sensing system determines the presence of moisture in the flow passage and generates a signal in response thereto. A controller receives the signal from the sensing system and controls the circulation system to maintain a predetermined temperature and relative humidity in the flow passage.

A ventilation structure is set on a parting portion between an outer wall member and an eave member, and extends in a longitudinal direction along the parting portion. The ventilation structure includes an outer wall base member, the outer wall member provided on the outer wall base member through a furring strip, the eave member provided upward beyond the outer wall member and an upper end of the furring strip, and a ventilation member set in a space between the outer wall base member, the furring strip, the outer wall member and the eave member for ventilating an aeration layer between the outer wall base member and the outer wall member and an exterior. The ventilation member is constituted of a frame member and an aeration member set on the frame member. The frame member includes a first vertical portion, a top surface portion, a second vertical portion and a bottom surface portion. The aeration member includes a plurality of vent holes passing through the same from an outer surface to an inner surface.

A passive ventilation control system and method. The system includes passive vents throughout a building. The vents may be arranged in multiple sets, with each set being substantially vertically aligned through multiple floors or the entire height of the building. Sensors are positioned inside and/or outside the building for sensing different environmental parameters or atmospheric conditions. The sensors send signals to a controller, which automatically adjusts airflow through the vents in response to the signals from the sensors.

The invention relates to a method for controlling a passive-ventilation system of a building, comprising: determining an outdoor air temperature of air in an environment of the building; determining an indoor air temperature of at least one zone inside the building; calculating a temperature difference by subtracting the determined outside air temperature from the determined indoor air temperature; and, if the calculated temperature difference is greater than zero, controlling a state of at least one passive-ventilation device of the passive-ventilation system to be in any of a closed state, an open state, and one of one or more intermediate states between closed and open state. Each of the states corresponds to one value of an opening fraction value of the at least one zone inside the building varying between 0 and 1.

Passive cooling materials are configured to provide free convective air flow. Various arrangements of elements can be used in occupant shelters to passively cool shelter occupants while providing air exchange with the outside ambient environment, without provision of electrical power. Examples can be used alone or with additional cooling, ventilation and dehumidification systems to reduce required electrical power to provide cooling.

A vent with an adjustable baffle is disclosed. As the baffle is rotated away from the frame of the vent a corresponding opening is formed though which air may flow. The vent further has features which constrict the width of the opening in response to how far the baffle is opened. When the baffle is partially opened, these constricting features block a portion of the vent opening resulting in an opening of a certain width. The baffle can be opened further to a point beyond the constricting feature so that a wider vent opening is created. The design allows for more, and easier control of air flow in a system and can increase the distance air coming though the vent moves into the space before it descends.

An inverted exhaust plenum module exhausts air from an enclosure into an ambient environment while mitigating airflow restrictions caused by ambient wind conditions, particularly headwinds impinging on exhaust vents. The plenum module includes wall elements that extend downwards from separate edges of two separate roof elements of the enclosure, forming a plenum between the wall elements that is open at the top. Exhaust vents in the wall elements exhaust air from the enclosure into the plenum to circulate into the ambient environment via the top of the plenum. By exhausting air into a plenum that extends beneath roof elements, the vents are at least partially obscured from ambient winds that might otherwise impinge on the vents. A wing element can be installed to induce exhaust airflow via lowering air pressure at the top of the plenum. The plenum module can be a separate module that is coupled to a structure.

A ventilation group for a livestock or industrial plant having a roof with an upper opening communicating with an external environment, at least one lateral opening being provided in a lateral wall of the plant and communicating with the environment. The group includes a collecting and conveying channel and elements fixing the channel to the roof, so that the channel is arranged below the upper opening. The channel is configured for collecting atmospheric precipitation which falls through the upper opening and for conveying it towards a ground surface. Via at least one air passage an inside of the plant communicates with the upper opening so as to generate an air flow entering the plant through the lateral opening and passing towards the environment through the passage and the upper opening.

A ventilation and air-conditioning system for a room includes a cooling air supply system, a supply air duct system and at least one enclosure. The enclosure includes an inlet, an outlet, and heat storage elements. The ventilation and air-conditioning system is configured such that when the operation of the cooling air supply system fails, a natural convection airflow occurs through the enclosure from the inlet to the outlet, the natural convection airflow being cooled by transferring heat to the heat storage elements. The supply air duct system is arranged above the inlet at a distance from the inlet. A gap is defined between the supply air duct system and the inlet. The inlet of the enclosure is adapted to be in constant flow communication with the room by air flowing from the room through the gap into the inlet of the enclosure.