This patent presents a method, and some devices based on the method, to achieve near zero air based transmission of disease within a business, while still allowing people to approach each other closer than arms length touching distance. This can be achieved with rapidly deployable portable units. It also presents a simple method to test whether the airflow structure requirements of the system have been met, and to adjust it if not.

An air conditioner is provided that may include a case in which a heat exchanger is disposed and having an air inlet and an air outlet; a discharge pipe that communicates with the air outlet and extends outside of the case; and a kit having a discharge port in which the discharge pipe is fixed, and configured to be disposed at a window frame. The kit may include a main board in which the discharge port is formed; at least one sub-board configured to be movable up and down with respect to the main board; a rack connected with one of the main board or the at least one sub-board and forming a plurality of grooves spaced apart from each other in an upward-downward direction; and a holder connected with the other one of the main board or the at least one sub-board and having a protrusion inserted into one of the plurality of grooves to restrict upward-downward movement of the at least one sub-board.

A multifunction adaptive whole house fan system can include a whole house fan to pull large volume of air through a building structure. The whole house fan can pull air from a motorized window or damper into the building structure and expel air through an attic. The system can monitor the environment to operate the whole house fan when desired conditions are present in coordination with other systems of the building structure to reduce overall energy consumption.

The invention discloses a mobile cabin with sound-absorbing features, whereas cabins may be interconnected, if necessary, by connection devices as modules into a larger set of cabins and detached again, if necessary, and used as individual cabins or smaller sets of cabins. The invention also discloses a method for ventilation of the mobile cabin.

The invention discloses a mobile cabin with sound-absorbing features, whereas cabins may be interconnected, if necessary, by connection devices as modules into a larger set of cabins and detached again, if necessary, and used as individual cabins or smaller sets of cabins. The invention also discloses a method for ventilation of the mobile cabin.

A multifunction adaptive whole house fan system can include a whole house fan to pull large volume of air through a building structure. The whole house fan can pull air from a motorized window or damper into the building structure and expel air through an attic. The system can monitor the environment to operate the whole house fan when desired conditions are present in coordination with other systems of the building structure to reduce overall energy consumption.

A manifold assembly includes a body and a damper assembly. The body defines a first opening, a second opening, outlet third opening, and a fluid plenum. The fluid plenum fluidly couples the first opening, the second opening, and the third opening. The damper assembly includes a first damper, a second damper, and a connecting member. The first damper is disposed within the fluid plenum proximate to the first opening. The second damper is disposed within the fluid plenum proximate to the second opening. The connecting member is coupled to both the first damper and the second damper and is configured to move the first damper and the second damper to selectively open one of the first opening or the second opening while closing the one not opened.

A manifold assembly includes a body and a damper assembly. The body defines a first opening, a second opening, outlet third opening, and a fluid plenum. The fluid plenum fluidly couples the first opening, the second opening, and the third opening. The damper assembly includes a first damper, a second damper, and a connecting member. The first damper is disposed within the fluid plenum proximate to the first opening. The second damper is disposed within the fluid plenum proximate to the second opening. The connecting member is coupled to both the first damper and the second damper and is configured to move the first damper and the second damper to selectively open one of the first opening or the second opening while closing the one not opened.

A method of controlling indoor air humidity includes determining a dew point set point and determining a dew point of air from a space within a building. The method also includes, in response to determining that the dew point satisfies the dew point set point, determining a vent air dew point of air in an external environment surrounding the building. The method further includes, in response to determining that the vent air dew point is below the dew point set point by a dew point threshold, controlling a connecting member of a damper assembly to position a first damper of the damper assembly in an open position to draw in vent air from the external environment into the space, and to position a second damper of the damper assembly in a close position to substantially prevent recirculation of air through the dehumidifier.

A ventilation screed configured to be mounted at a vertical wall of a structure includes an attachment flange having an upper end region and a lower end region opposite the upper end region. A cavity structure is disposed along the upper end region of the attachment flange. The cavity structure has a first side, a second side, and a third side. The first side extends from the upper end region of the attachment flange. The third side extends over the first side and is spaced from the first side and from the upper end region of the attachment flange. The second side extends between the first side and the third side. At least one ventilation opening is formed through the first side of the cavity structure. A ventilation spacer extends from the first side of the cavity structure and is spaced from and extends partially along the attachment flange.